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| author | bors <bors@rust-lang.org> | 2020-09-20 01:38:26 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2020-09-20 01:38:26 +0000 |
| commit | 255a4c58f5863ed41c2e68792799125c6c676575 (patch) | |
| tree | 07f3b9a5dccecda14b0b7f6e6579be0d615c5f73 | |
| parent | f68e08933d8f519a9655934fedebbc509661b219 (diff) | |
| parent | 2f9271b14c9ec0e5ed72ec91c2e24e850c580f83 (diff) | |
| download | rust-255a4c58f5863ed41c2e68792799125c6c676575.tar.gz rust-255a4c58f5863ed41c2e68792799125c6c676575.zip | |
Auto merge of #72632 - jonas-schievink:dest-prop, r=oli-obk
Implement a generic Destination Propagation optimization on MIR This takes the work that was originally started by `@eddyb` in https://github.com/rust-lang/rust/pull/47954, and then explored by me in https://github.com/rust-lang/rust/pull/71003, and implements it in a general (ie. not limited to acyclic CFGs) and dataflow-driven way (so that no additional infrastructure in rustc is needed). The pass is configured to run at `mir-opt-level=2` and higher only. To enable it by default, some followup work on it is still needed: * Performance needs to be evaluated. I did some light optimization work and tested against `tuple-stress`, which caused trouble in my last attempt, but didn't go much in depth here. * We can also enable the pass only at `opt-level=2` and higher, if it is too slow to run in debug mode, but fine when optimizations run anyways. * Debuginfo needs to be fixed after locals are merged. I did not look into what is required for this. * Live ranges of locals (aka `StorageLive` and `StorageDead`) are currently deleted. We either need to decide that this is fine, or if not, merge the variable's live ranges (or remove these statements entirely – https://github.com/rust-lang/rust/issues/68622). Some benchmarks of the pass were done in https://github.com/rust-lang/rust/pull/72635.
35 files changed, 1919 insertions, 456 deletions
diff --git a/compiler/rustc_mir/src/dataflow/impls/mod.rs b/compiler/rustc_mir/src/dataflow/impls/mod.rs index c42d5867856..1769feaf7a5 100644 --- a/compiler/rustc_mir/src/dataflow/impls/mod.rs +++ b/compiler/rustc_mir/src/dataflow/impls/mod.rs @@ -204,7 +204,7 @@ impl<'a, 'tcx> HasMoveData<'tcx> for DefinitelyInitializedPlaces<'a, 'tcx> { /// `EverInitializedPlaces` tracks all places that might have ever been /// initialized upon reaching a particular point in the control flow -/// for a function, without an intervening `Storage Dead`. +/// for a function, without an intervening `StorageDead`. /// /// This dataflow is used to determine if an immutable local variable may /// be assigned to. diff --git a/compiler/rustc_mir/src/lib.rs b/compiler/rustc_mir/src/lib.rs index 42717f27384..251037792c9 100644 --- a/compiler/rustc_mir/src/lib.rs +++ b/compiler/rustc_mir/src/lib.rs @@ -6,6 +6,7 @@ Rust MIR: a lowered representation of Rust. #![feature(nll)] #![feature(in_band_lifetimes)] +#![feature(bindings_after_at)] #![feature(bool_to_option)] #![feature(box_patterns)] #![feature(box_syntax)] diff --git a/compiler/rustc_mir/src/transform/dest_prop.rs b/compiler/rustc_mir/src/transform/dest_prop.rs new file mode 100644 index 00000000000..46cbced2d54 --- /dev/null +++ b/compiler/rustc_mir/src/transform/dest_prop.rs @@ -0,0 +1,1057 @@ +//! Propagates assignment destinations backwards in the CFG to eliminate redundant assignments. +//! +//! # Motivation +//! +//! MIR building can insert a lot of redundant copies, and Rust code in general often tends to move +//! values around a lot. The result is a lot of assignments of the form `dest = {move} src;` in MIR. +//! MIR building for constants in particular tends to create additional locals that are only used +//! inside a single block to shuffle a value around unnecessarily. +//! +//! LLVM by itself is not good enough at eliminating these redundant copies (eg. see +//! https://github.com/rust-lang/rust/issues/32966), so this leaves some performance on the table +//! that we can regain by implementing an optimization for removing these assign statements in rustc +//! itself. When this optimization runs fast enough, it can also speed up the constant evaluation +//! and code generation phases of rustc due to the reduced number of statements and locals. +//! +//! # The Optimization +//! +//! Conceptually, this optimization is "destination propagation". It is similar to the Named Return +//! Value Optimization, or NRVO, known from the C++ world, except that it isn't limited to return +//! values or the return place `_0`. On a very high level, independent of the actual implementation +//! details, it does the following: +//! +//! 1) Identify `dest = src;` statements that can be soundly eliminated. +//! 2) Replace all mentions of `src` with `dest` ("unifying" them and propagating the destination +//! backwards). +//! 3) Delete the `dest = src;` statement (by making it a `nop`). +//! +//! Step 1) is by far the hardest, so it is explained in more detail below. +//! +//! ## Soundness +//! +//! Given an `Assign` statement `dest = src;`, where `dest` is a `Place` and `src` is an `Rvalue`, +//! there are a few requirements that must hold for the optimization to be sound: +//! +//! * `dest` must not contain any *indirection* through a pointer. It must access part of the base +//! local. Otherwise it might point to arbitrary memory that is hard to track. +//! +//! It must also not contain any indexing projections, since those take an arbitrary `Local` as +//! the index, and that local might only be initialized shortly before `dest` is used. +//! +//! Subtle case: If `dest` is a, or projects through a union, then we have to make sure that there +//! remains an assignment to it, since that sets the "active field" of the union. But if `src` is +//! a ZST, it might not be initialized, so there might not be any use of it before the assignment, +//! and performing the optimization would simply delete the assignment, leaving `dest` +//! uninitialized. +//! +//! * `src` must be a bare `Local` without any indirections or field projections (FIXME: Is this a +//! fundamental restriction or just current impl state?). It can be copied or moved by the +//! assignment. +//! +//! * The `dest` and `src` locals must never be [*live*][liveness] at the same time. If they are, it +//! means that they both hold a (potentially different) value that is needed by a future use of +//! the locals. Unifying them would overwrite one of the values. +//! +//! Note that computing liveness of locals that have had their address taken is more difficult: +//! Short of doing full escape analysis on the address/pointer/reference, the pass would need to +//! assume that any operation that can potentially involve opaque user code (such as function +//! calls, destructors, and inline assembly) may access any local that had its address taken +//! before that point. +//! +//! Here, the first two conditions are simple structural requirements on the `Assign` statements +//! that can be trivially checked. The liveness requirement however is more difficult and costly to +//! check. +//! +//! ## Previous Work +//! +//! A [previous attempt] at implementing an optimization like this turned out to be a significant +//! regression in compiler performance. Fixing the regressions introduced a lot of undesirable +//! complexity to the implementation. +//! +//! A [subsequent approach] tried to avoid the costly computation by limiting itself to acyclic +//! CFGs, but still turned out to be far too costly to run due to suboptimal performance within +//! individual basic blocks, requiring a walk across the entire block for every assignment found +//! within the block. For the `tuple-stress` benchmark, which has 458745 statements in a single +//! block, this proved to be far too costly. +//! +//! Since the first attempt at this, the compiler has improved dramatically, and new analysis +//! frameworks have been added that should make this approach viable without requiring a limited +//! approach that only works for some classes of CFGs: +//! - rustc now has a powerful dataflow analysis framework that can handle forwards and backwards +//! analyses efficiently. +//! - Layout optimizations for generators have been added to improve code generation for +//! async/await, which are very similar in spirit to what this optimization does. Both walk the +//! MIR and record conflicting uses of locals in a `BitMatrix`. +//! +//! Also, rustc now has a simple NRVO pass (see `nrvo.rs`), which handles a subset of the cases that +//! this destination propagation pass handles, proving that similar optimizations can be performed +//! on MIR. +//! +//! ## Pre/Post Optimization +//! +//! It is recommended to run `SimplifyCfg` and then `SimplifyLocals` some time after this pass, as +//! it replaces the eliminated assign statements with `nop`s and leaves unused locals behind. +//! +//! [liveness]: https://en.wikipedia.org/wiki/Live_variable_analysis +//! [previous attempt]: https://github.com/rust-lang/rust/pull/47954 +//! [subsequent approach]: https://github.com/rust-lang/rust/pull/71003 + +use crate::dataflow::impls::{MaybeInitializedLocals, MaybeLiveLocals}; +use crate::dataflow::Analysis; +use crate::{ + transform::{MirPass, MirSource}, + util::{dump_mir, PassWhere}, +}; +use itertools::Itertools; +use rustc_data_structures::unify::{InPlaceUnificationTable, UnifyKey}; +use rustc_index::{ + bit_set::{BitMatrix, BitSet}, + vec::IndexVec, +}; +use rustc_middle::mir::tcx::PlaceTy; +use rustc_middle::mir::visit::{MutVisitor, PlaceContext, Visitor}; +use rustc_middle::mir::{ + traversal, Body, InlineAsmOperand, Local, LocalKind, Location, Operand, Place, PlaceElem, + Rvalue, Statement, StatementKind, Terminator, TerminatorKind, +}; +use rustc_middle::ty::{self, Ty, TyCtxt}; + +// Empirical measurements have resulted in some observations: +// - Running on a body with a single block and 500 locals takes barely any time +// - Running on a body with ~400 blocks and ~300 relevant locals takes "too long" +// ...so we just limit both to somewhat reasonable-ish looking values. +const MAX_LOCALS: usize = 500; +const MAX_BLOCKS: usize = 250; + +pub struct DestinationPropagation; + +impl<'tcx> MirPass<'tcx> for DestinationPropagation { + fn run_pass(&self, tcx: TyCtxt<'tcx>, source: MirSource<'tcx>, body: &mut Body<'tcx>) { + // Only run at mir-opt-level=2 or higher for now (we don't fix up debuginfo and remove + // storage statements at the moment). + if tcx.sess.opts.debugging_opts.mir_opt_level <= 1 { + return; + } + + let candidates = find_candidates(tcx, body); + if candidates.is_empty() { + debug!("{:?}: no dest prop candidates, done", source.def_id()); + return; + } + + // Collect all locals we care about. We only compute conflicts for these to save time. + let mut relevant_locals = BitSet::new_empty(body.local_decls.len()); + for CandidateAssignment { dest, src, loc: _ } in &candidates { + relevant_locals.insert(dest.local); + relevant_locals.insert(*src); + } + + // This pass unfortunately has `O(l² * s)` performance, where `l` is the number of locals + // and `s` is the number of statements and terminators in the function. + // To prevent blowing up compile times too much, we bail out when there are too many locals. + let relevant = relevant_locals.count(); + debug!( + "{:?}: {} locals ({} relevant), {} blocks", + source.def_id(), + body.local_decls.len(), + relevant, + body.basic_blocks().len() + ); + if relevant > MAX_LOCALS { + warn!( + "too many candidate locals in {:?} ({}, max is {}), not optimizing", + source.def_id(), + relevant, + MAX_LOCALS + ); + return; + } + if body.basic_blocks().len() > MAX_BLOCKS { + warn!( + "too many blocks in {:?} ({}, max is {}), not optimizing", + source.def_id(), + body.basic_blocks().len(), + MAX_BLOCKS + ); + return; + } + + let mut conflicts = Conflicts::build(tcx, body, source, &relevant_locals); + + let mut replacements = Replacements::new(body.local_decls.len()); + for candidate @ CandidateAssignment { dest, src, loc } in candidates { + // Merge locals that don't conflict. + if !conflicts.can_unify(dest.local, src) { + debug!("at assignment {:?}, conflict {:?} vs. {:?}", loc, dest.local, src); + continue; + } + + if replacements.for_src(candidate.src).is_some() { + debug!("src {:?} already has replacement", candidate.src); + continue; + } + + if !tcx.consider_optimizing(|| { + format!("DestinationPropagation {:?} {:?}", source.def_id(), candidate) + }) { + break; + } + + replacements.push(candidate); + conflicts.unify(candidate.src, candidate.dest.local); + } + + replacements.flatten(tcx); + + debug!("replacements {:?}", replacements.map); + + Replacer { tcx, replacements, place_elem_cache: Vec::new() }.visit_body(body); + + // FIXME fix debug info + } +} + +#[derive(Debug, Eq, PartialEq, Copy, Clone)] +struct UnifyLocal(Local); + +impl From<Local> for UnifyLocal { + fn from(l: Local) -> Self { + Self(l) + } +} + +impl UnifyKey for UnifyLocal { + type Value = (); + fn index(&self) -> u32 { + self.0.as_u32() + } + fn from_index(u: u32) -> Self { + Self(Local::from_u32(u)) + } + fn tag() -> &'static str { + "UnifyLocal" + } +} + +struct Replacements<'tcx> { + /// Maps locals to their replacement. + map: IndexVec<Local, Option<Place<'tcx>>>, + + /// Whose locals' live ranges to kill. + kill: BitSet<Local>, +} + +impl Replacements<'tcx> { + fn new(locals: usize) -> Self { + Self { map: IndexVec::from_elem_n(None, locals), kill: BitSet::new_empty(locals) } + } + + fn push(&mut self, candidate: CandidateAssignment<'tcx>) { + trace!("Replacements::push({:?})", candidate); + let entry = &mut self.map[candidate.src]; + assert!(entry.is_none()); + + *entry = Some(candidate.dest); + self.kill.insert(candidate.src); + self.kill.insert(candidate.dest.local); + } + + /// Applies the stored replacements to all replacements, until no replacements would result in + /// locals that need further replacements when applied. + fn flatten(&mut self, tcx: TyCtxt<'tcx>) { + // Note: This assumes that there are no cycles in the replacements, which is enforced via + // `self.unified_locals`. Otherwise this can cause an infinite loop. + + for local in self.map.indices() { + if let Some(replacement) = self.map[local] { + // Substitute the base local of `replacement` until fixpoint. + let mut base = replacement.local; + let mut reversed_projection_slices = Vec::with_capacity(1); + while let Some(replacement_for_replacement) = self.map[base] { + base = replacement_for_replacement.local; + reversed_projection_slices.push(replacement_for_replacement.projection); + } + + let projection: Vec<_> = reversed_projection_slices + .iter() + .rev() + .flat_map(|projs| projs.iter()) + .chain(replacement.projection.iter()) + .collect(); + let projection = tcx.intern_place_elems(&projection); + + // Replace with the final `Place`. + self.map[local] = Some(Place { local: base, projection }); + } + } + } + + fn for_src(&self, src: Local) -> Option<Place<'tcx>> { + self.map[src] + } +} + +struct Replacer<'tcx> { + tcx: TyCtxt<'tcx>, + replacements: Replacements<'tcx>, + place_elem_cache: Vec<PlaceElem<'tcx>>, +} + +impl<'tcx> MutVisitor<'tcx> for Replacer<'tcx> { + fn tcx<'a>(&'a self) -> TyCtxt<'tcx> { + self.tcx + } + + fn visit_local(&mut self, local: &mut Local, context: PlaceContext, location: Location) { + if context.is_use() && self.replacements.for_src(*local).is_some() { + bug!( + "use of local {:?} should have been replaced by visit_place; context={:?}, loc={:?}", + local, + context, + location, + ); + } + } + + fn process_projection_elem( + &mut self, + elem: PlaceElem<'tcx>, + _: Location, + ) -> Option<PlaceElem<'tcx>> { + match elem { + PlaceElem::Index(local) => { + if let Some(replacement) = self.replacements.for_src(local) { + bug!( + "cannot replace {:?} with {:?} in index projection {:?}", + local, + replacement, + elem, + ); + } else { + None + } + } + _ => None, + } + } + + fn visit_place(&mut self, place: &mut Place<'tcx>, context: PlaceContext, location: Location) { + if let Some(replacement) = self.replacements.for_src(place.local) { + // Rebase `place`s projections onto `replacement`'s. + self.place_elem_cache.clear(); + self.place_elem_cache.extend(replacement.projection.iter().chain(place.projection)); + let projection = self.tcx.intern_place_elems(&self.place_elem_cache); + let new_place = Place { local: replacement.local, projection }; + + debug!("Replacer: {:?} -> {:?}", place, new_place); + *place = new_place; + } + + self.super_place(place, context, location); + } + + fn visit_statement(&mut self, statement: &mut Statement<'tcx>, location: Location) { + self.super_statement(statement, location); + + match &statement.kind { + // FIXME: Don't delete storage statements, merge the live ranges instead + StatementKind::StorageDead(local) | StatementKind::StorageLive(local) + if self.replacements.kill.contains(*local) => + { + statement.make_nop() + } + + StatementKind::Assign(box (dest, rvalue)) => { + match rvalue { + Rvalue::Use(Operand::Copy(place) | Operand::Move(place)) => { + // These might've been turned into self-assignments by the replacement + // (this includes the original statement we wanted to eliminate). + if dest == place { + debug!("{:?} turned into self-assignment, deleting", location); + statement.make_nop(); + } + } + _ => {} + } + } + + _ => {} + } + } +} + +struct Conflicts<'a> { + relevant_locals: &'a BitSet<Local>, + + /// The conflict matrix. It is always symmetric and the adjacency matrix of the corresponding + /// conflict graph. + matrix: BitMatrix<Local, Local>, + + /// Preallocated `BitSet` used by `unify`. + unify_cache: BitSet<Local>, + + /// Tracks locals that have been merged together to prevent cycles and propagate conflicts. + unified_locals: InPlaceUnificationTable<UnifyLocal>, +} + +impl Conflicts<'a> { + fn build<'tcx>( + tcx: TyCtxt<'tcx>, + body: &'_ Body<'tcx>, + source: MirSource<'tcx>, + relevant_locals: &'a BitSet<Local>, + ) -> Self { + // We don't have to look out for locals that have their address taken, since + // `find_candidates` already takes care of that. + + let conflicts = BitMatrix::from_row_n( + &BitSet::new_empty(body.local_decls.len()), + body.local_decls.len(), + ); + + let def_id = source.def_id(); + let mut init = MaybeInitializedLocals + .into_engine(tcx, body, def_id) + .iterate_to_fixpoint() + .into_results_cursor(body); + let mut live = MaybeLiveLocals + .into_engine(tcx, body, def_id) + .iterate_to_fixpoint() + .into_results_cursor(body); + + let mut reachable = None; + dump_mir( + tcx, + None, + "DestinationPropagation-dataflow", + &"", + source, + body, + |pass_where, w| { + let reachable = + reachable.get_or_insert_with(|| traversal::reachable_as_bitset(body)); + + match pass_where { + PassWhere::BeforeLocation(loc) if reachable.contains(loc.block) => { + init.seek_before_primary_effect(loc); + live.seek_after_primary_effect(loc); + + writeln!(w, " // init: {:?}", init.get())?; + writeln!(w, " // live: {:?}", live.get())?; + } + PassWhere::AfterTerminator(bb) if reachable.contains(bb) => { + let loc = body.terminator_loc(bb); + init.seek_after_primary_effect(loc); + live.seek_before_primary_effect(loc); + + writeln!(w, " // init: {:?}", init.get())?; + writeln!(w, " // live: {:?}", live.get())?; + } + + PassWhere::BeforeBlock(bb) if reachable.contains(bb) => { + init.seek_to_block_start(bb); + live.seek_to_block_start(bb); + + writeln!(w, " // init: {:?}", init.get())?; + writeln!(w, " // live: {:?}", live.get())?; + } + + PassWhere::BeforeCFG | PassWhere::AfterCFG | PassWhere::AfterLocation(_) => {} + + PassWhere::BeforeLocation(_) | PassWhere::AfterTerminator(_) => { + writeln!(w, " // init: <unreachable>")?; + writeln!(w, " // live: <unreachable>")?; + } + + PassWhere::BeforeBlock(_) => { + writeln!(w, " // init: <unreachable>")?; + writeln!(w, " // live: <unreachable>")?; + } + } + + Ok(()) + }, + ); + + let mut this = Self { + relevant_locals, + matrix: conflicts, + unify_cache: BitSet::new_empty(body.local_decls.len()), + unified_locals: { + let mut table = InPlaceUnificationTable::new(); + // Pre-fill table with all locals (this creates N nodes / "connected" components, + // "graph"-ically speaking). + for local in 0..body.local_decls.len() { + assert_eq!(table.new_key(()), UnifyLocal(Local::from_usize(local))); + } + table + }, + }; + + let mut live_and_init_locals = Vec::new(); + + // Visit only reachable basic blocks. The exact order is not important. + for (block, data) in traversal::preorder(body) { + // We need to observe the dataflow state *before* all possible locations (statement or + // terminator) in each basic block, and then observe the state *after* the terminator + // effect is applied. As long as neither `init` nor `borrowed` has a "before" effect, + // we will observe all possible dataflow states. + + // Since liveness is a backwards analysis, we need to walk the results backwards. To do + // that, we first collect in the `MaybeInitializedLocals` results in a forwards + // traversal. + + live_and_init_locals.resize_with(data.statements.len() + 1, || { + BitSet::new_empty(body.local_decls.len()) + }); + + // First, go forwards for `MaybeInitializedLocals` and apply intra-statement/terminator + // conflicts. + for (i, statement) in data.statements.iter().enumerate() { + this.record_statement_conflicts(statement); + + let loc = Location { block, statement_index: i }; + init.seek_before_primary_effect(loc); + + live_and_init_locals[i].clone_from(init.get()); + } + + this.record_terminator_conflicts(data.terminator()); + let term_loc = Location { block, statement_index: data.statements.len() }; + init.seek_before_primary_effect(term_loc); + live_and_init_locals[term_loc.statement_index].clone_from(init.get()); + + // Now, go backwards and union with the liveness results. + for statement_index in (0..=data.statements.len()).rev() { + let loc = Location { block, statement_index }; + live.seek_after_primary_effect(loc); + + live_and_init_locals[statement_index].intersect(live.get()); + + trace!("record conflicts at {:?}", loc); + + this.record_dataflow_conflicts(&mut live_and_init_locals[statement_index]); + } + + init.seek_to_block_end(block); + live.seek_to_block_end(block); + let mut conflicts = init.get().clone(); + conflicts.intersect(live.get()); + trace!("record conflicts at end of {:?}", block); + + this.record_dataflow_conflicts(&mut conflicts); + } + + this + } + + fn record_dataflow_conflicts(&mut self, new_conflicts: &mut BitSet<Local>) { + // Remove all locals that are not candidates. + new_conflicts.intersect(self.relevant_locals); + + for local in new_conflicts.iter() { + self.matrix.union_row_with(&new_conflicts, local); + } + } + + fn record_local_conflict(&mut self, a: Local, b: Local, why: &str) { + trace!("conflict {:?} <-> {:?} due to {}", a, b, why); + self.matrix.insert(a, b); + self.matrix.insert(b, a); + } + + /// Records locals that must not overlap during the evaluation of `stmt`. These locals conflict + /// and must not be merged. + fn record_statement_conflicts(&mut self, stmt: &Statement<'_>) { + match &stmt.kind { + // While the left and right sides of an assignment must not overlap, we do not mark + // conflicts here as that would make this optimization useless. When we optimize, we + // eliminate the resulting self-assignments automatically. + StatementKind::Assign(_) => {} + + StatementKind::LlvmInlineAsm(asm) => { + // Inputs and outputs must not overlap. + for (_, input) in &*asm.inputs { + if let Some(in_place) = input.place() { + if !in_place.is_indirect() { + for out_place in &*asm.outputs { + if !out_place.is_indirect() && !in_place.is_indirect() { + self.record_local_conflict( + in_place.local, + out_place.local, + "aliasing llvm_asm! operands", + ); + } + } + } + } + } + } + + StatementKind::SetDiscriminant { .. } + | StatementKind::StorageLive(..) + | StatementKind::StorageDead(..) + | StatementKind::Retag(..) + | StatementKind::FakeRead(..) + | StatementKind::AscribeUserType(..) + | StatementKind::Coverage(..) + | StatementKind::Nop => {} + } + } + + fn record_terminator_conflicts(&mut self, term: &Terminator<'_>) { + match &term.kind { + TerminatorKind::DropAndReplace { + place: dropped_place, + value, + target: _, + unwind: _, + } => { + if let Some(place) = value.place() { + if !place.is_indirect() && !dropped_place.is_indirect() { + self.record_local_conflict( + place.local, + dropped_place.local, + "DropAndReplace operand overlap", + ); + } + } + } + TerminatorKind::Yield { value, resume: _, resume_arg, drop: _ } => { + if let Some(place) = value.place() { + if !place.is_indirect() && !resume_arg.is_indirect() { + self.record_local_conflict( + place.local, + resume_arg.local, + "Yield operand overlap", + ); + } + } + } + TerminatorKind::Call { + func, + args, + destination: Some((dest_place, _)), + cleanup: _, + from_hir_call: _, + fn_span: _, + } => { + // No arguments may overlap with the destination. + for arg in args.iter().chain(Some(func)) { + if let Some(place) = arg.place() { + if !place.is_indirect() && !dest_place.is_indirect() { + self.record_local_conflict( + dest_place.local, + place.local, + "call dest/arg overlap", + ); + } + } + } + } + TerminatorKind::InlineAsm { + template: _, + operands, + options: _, + line_spans: _, + destination: _, + } => { + // The intended semantics here aren't documented, we just assume that nothing that + // could be written to by the assembly may overlap with any other operands. + for op in operands { + match op { + InlineAsmOperand::Out { reg: _, late: _, place: Some(dest_place) } + | InlineAsmOperand::InOut { + reg: _, + late: _, + in_value: _, + out_place: Some(dest_place), + } => { + // For output place `place`, add all places accessed by the inline asm. + for op in operands { + match op { + InlineAsmOperand::In { reg: _, value } => { + if let Some(p) = value.place() { + if !p.is_indirect() && !dest_place.is_indirect() { + self.record_local_conflict( + p.local, + dest_place.local, + "asm! operand overlap", + ); + } + } + } + InlineAsmOperand::Out { + reg: _, + late: _, + place: Some(place), + } => { + if !place.is_indirect() && !dest_place.is_indirect() { + self.record_local_conflict( + place.local, + dest_place.local, + "asm! operand overlap", + ); + } + } + InlineAsmOperand::InOut { + reg: _, + late: _, + in_value, + out_place, + } => { + if let Some(place) = in_value.place() { + if !place.is_indirect() && !dest_place.is_indirect() { + self.record_local_conflict( + place.local, + dest_place.local, + "asm! operand overlap", + ); + } + } + + if let Some(place) = out_place { + if !place.is_indirect() && !dest_place.is_indirect() { + self.record_local_conflict( + place.local, + dest_place.local, + "asm! operand overlap", + ); + } + } + } + InlineAsmOperand::Out { reg: _, late: _, place: None } + | InlineAsmOperand::Const { value: _ } + | InlineAsmOperand::SymFn { value: _ } + | InlineAsmOperand::SymStatic { def_id: _ } => {} + } + } + } + InlineAsmOperand::Const { value } => { + assert!(value.place().is_none()); + } + InlineAsmOperand::InOut { + reg: _, + late: _, + in_value: _, + out_place: None, + } + | InlineAsmOperand::In { reg: _, value: _ } + | InlineAsmOperand::Out { reg: _, late: _, place: None } + | InlineAsmOperand::SymFn { value: _ } + | InlineAsmOperand::SymStatic { def_id: _ } => {} + } + } + } + + TerminatorKind::Goto { .. } + | TerminatorKind::Call { destination: None, .. } + | TerminatorKind::SwitchInt { .. } + | TerminatorKind::Resume + | TerminatorKind::Abort + | TerminatorKind::Return + | TerminatorKind::Unreachable + | TerminatorKind::Drop { .. } + | TerminatorKind::Assert { .. } + | TerminatorKind::GeneratorDrop + | TerminatorKind::FalseEdge { .. } + | TerminatorKind::FalseUnwind { .. } => {} + } + } + + /// Checks whether `a` and `b` may be merged. Returns `false` if there's a conflict. + fn can_unify(&mut self, a: Local, b: Local) -> bool { + // After some locals have been unified, their conflicts are only tracked in the root key, + // so look that up. + let a = self.unified_locals.find(a).0; + let b = self.unified_locals.find(b).0; + + if a == b { + // Already merged (part of the same connected component). + return false; + } + + if self.matrix.contains(a, b) { + // Conflict (derived via dataflow, intra-statement conflicts, or inherited from another + // local during unification). + return false; + } + + true + } + + /// Merges the conflicts of `a` and `b`, so that each one inherits all conflicts of the other. + /// + /// `can_unify` must have returned `true` for the same locals, or this may panic or lead to + /// miscompiles. + /// + /// This is called when the pass makes the decision to unify `a` and `b` (or parts of `a` and + /// `b`) and is needed to ensure that future unification decisions take potentially newly + /// introduced conflicts into account. + /// + /// For an example, assume we have locals `_0`, `_1`, `_2`, and `_3`. There are these conflicts: + /// + /// * `_0` <-> `_1` + /// * `_1` <-> `_2` + /// * `_3` <-> `_0` + /// + /// We then decide to merge `_2` with `_3` since they don't conflict. Then we decide to merge + /// `_2` with `_0`, which also doesn't have a conflict in the above list. However `_2` is now + /// `_3`, which does conflict with `_0`. + fn unify(&mut self, a: Local, b: Local) { + trace!("unify({:?}, {:?})", a, b); + + // Get the root local of the connected components. The root local stores the conflicts of + // all locals in the connected component (and *is stored* as the conflicting local of other + // locals). + let a = self.unified_locals.find(a).0; + let b = self.unified_locals.find(b).0; + assert_ne!(a, b); + + trace!("roots: a={:?}, b={:?}", a, b); + trace!("{:?} conflicts: {:?}", a, self.matrix.iter(a).format(", ")); + trace!("{:?} conflicts: {:?}", b, self.matrix.iter(b).format(", ")); + + self.unified_locals.union(a, b); + + let root = self.unified_locals.find(a).0; + assert!(root == a || root == b); + + // Make all locals that conflict with `a` also conflict with `b`, and vice versa. + self.unify_cache.clear(); + for conflicts_with_a in self.matrix.iter(a) { + self.unify_cache.insert(conflicts_with_a); + } + for conflicts_with_b in self.matrix.iter(b) { + self.unify_cache.insert(conflicts_with_b); + } + for conflicts_with_a_or_b in self.unify_cache.iter() { + // Set both `a` and `b` for this local's row. + self.matrix.insert(conflicts_with_a_or_b, a); + self.matrix.insert(conflicts_with_a_or_b, b); + } + + // Write the locals `a` conflicts with to `b`'s row. + self.matrix.union_rows(a, b); + // Write the locals `b` conflicts with to `a`'s row. + self.matrix.union_rows(b, a); + } +} + +/// A `dest = {move} src;` statement at `loc`. +/// +/// We want to consider merging `dest` and `src` due to this assignment. +#[derive(Debug, Copy, Clone)] +struct CandidateAssignment<'tcx> { + /// Does not contain indirection or indexing (so the only local it contains is the place base). + dest: Place<'tcx>, + src: Local, + loc: Location, +} + +/// Scans the MIR for assignments between locals that we might want to consider merging. +/// +/// This will filter out assignments that do not match the right form (as described in the top-level +/// comment) and also throw out assignments that involve a local that has its address taken or is +/// otherwise ineligible (eg. locals used as array indices are ignored because we cannot propagate +/// arbitrary places into array indices). +fn find_candidates<'a, 'tcx>( + tcx: TyCtxt<'tcx>, + body: &'a Body<'tcx>, +) -> Vec<CandidateAssignment<'tcx>> { + let mut visitor = FindAssignments { + tcx, + body, + candidates: Vec::new(), + ever_borrowed_locals: ever_borrowed_locals(body), + locals_used_as_array_index: locals_used_as_array_index(body), + }; + visitor.visit_body(body); + visitor.candidates +} + +struct FindAssignments<'a, 'tcx> { + tcx: TyCtxt<'tcx>, + body: &'a Body<'tcx>, + candidates: Vec<CandidateAssignment<'tcx>>, + ever_borrowed_locals: BitSet<Local>, + locals_used_as_array_index: BitSet<Local>, +} + +impl<'a, 'tcx> Visitor<'tcx> for FindAssignments<'a, 'tcx> { + fn visit_statement(&mut self, statement: &Statement<'tcx>, location: Location) { + if let StatementKind::Assign(box ( + dest, + Rvalue::Use(Operand::Copy(src) | Operand::Move(src)), + )) = &statement.kind + { + // `dest` must not have pointer indirection. + if dest.is_indirect() { + return; + } + + // `src` must be a plain local. + if !src.projection.is_empty() { + return; + } + + // Since we want to replace `src` with `dest`, `src` must not be required. + if is_local_required(src.local, self.body) { + return; + } + + // Can't optimize if both locals ever have their address taken (can introduce + // aliasing). + // FIXME: This can be smarter and take `StorageDead` into account (which + // invalidates borrows). + if self.ever_borrowed_locals.contains(dest.local) + && self.ever_borrowed_locals.contains(src.local) + { + return; + } + + assert_ne!(dest.local, src.local, "self-assignments are UB"); + + // We can't replace locals occurring in `PlaceElem::Index` for now. + if self.locals_used_as_array_index.contains(src.local) { + return; + } + + // Handle the "subtle case" described above by rejecting any `dest` that is or + // projects through a union. + let is_union = |ty: Ty<'_>| { + if let ty::Adt(def, _) = ty.kind() { + if def.is_union() { + return true; + } + } + + false + }; + let mut place_ty = PlaceTy::from_ty(self.body.local_decls[dest.local].ty); + if is_union(place_ty.ty) { + return; + } + for elem in dest.projection { + if let PlaceElem::Index(_) = elem { + // `dest` contains an indexing projection. + return; + } + + place_ty = place_ty.projection_ty(self.tcx, elem); + if is_union(place_ty.ty) { + return; + } + } + + self.candidates.push(CandidateAssignment { + dest: *dest, + src: src.local, + loc: location, + }); + } + } +} + +/// Some locals are part of the function's interface and can not be removed. +/// +/// Note that these locals *can* still be merged with non-required locals by removing that other +/// local. +fn is_local_required(local: Local, body: &Body<'_>) -> bool { + match body.local_kind(local) { + LocalKind::Arg | LocalKind::ReturnPointer => true, + LocalKind::Var | LocalKind::Temp => false, + } +} + +/// Walks MIR to find all locals that have their address taken anywhere. +fn ever_borrowed_locals(body: &Body<'_>) -> BitSet<Local> { + let mut visitor = BorrowCollector { locals: BitSet::new_empty(body.local_decls.len()) }; + visitor.visit_body(body); + visitor.locals +} + +struct BorrowCollector { + locals: BitSet<Local>, +} + +impl<'tcx> Visitor<'tcx> for BorrowCollector { + fn visit_rvalue(&mut self, rvalue: &Rvalue<'tcx>, location: Location) { + self.super_rvalue(rvalue, location); + + match rvalue { + Rvalue::AddressOf(_, borrowed_place) | Rvalue::Ref(_, _, borrowed_place) => { + if !borrowed_place.is_indirect() { + self.locals.insert(borrowed_place.local); + } + } + + Rvalue::Cast(..) + | Rvalue::Use(..) + | Rvalue::Repeat(..) + | Rvalue::Len(..) + | Rvalue::BinaryOp(..) + | Rvalue::CheckedBinaryOp(..) + | Rvalue::NullaryOp(..) + | Rvalue::UnaryOp(..) + | Rvalue::Discriminant(..) + | Rvalue::Aggregate(..) + | Rvalue::ThreadLocalRef(..) => {} + } + } + + fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location) { + self.super_terminator(terminator, location); + + match terminator.kind { + TerminatorKind::Drop { place: dropped_place, .. } + | TerminatorKind::DropAndReplace { place: dropped_place, .. } => { + self.locals.insert(dropped_place.local); + } + + TerminatorKind::Abort + | TerminatorKind::Assert { .. } + | TerminatorKind::Call { .. } + | TerminatorKind::FalseEdge { .. } + | TerminatorKind::FalseUnwind { .. } + | TerminatorKind::GeneratorDrop + | TerminatorKind::Goto { .. } + | TerminatorKind::Resume + | TerminatorKind::Return + | TerminatorKind::SwitchInt { .. } + | TerminatorKind::Unreachable + | TerminatorKind::Yield { .. } + | TerminatorKind::InlineAsm { .. } => {} + } + } +} + +/// `PlaceElem::Index` only stores a `Local`, so we can't replace that with a full `Place`. +/// +/// Collect locals used as indices so we don't generate candidates that are impossible to apply +/// later. +fn locals_used_as_array_index(body: &Body<'_>) -> BitSet<Local> { + let mut visitor = IndexCollector { locals: BitSet::new_empty(body.local_decls.len()) }; + visitor.visit_body(body); + visitor.locals +} + +struct IndexCollector { + locals: BitSet<Local>, +} + +impl<'tcx> Visitor<'tcx> for IndexCollector { + fn visit_projection_elem( + &mut self, + local: Local, + proj_base: &[PlaceElem<'tcx>], + elem: PlaceElem<'tcx>, + context: PlaceContext, + location: Location, + ) { + if let PlaceElem::Index(i) = elem { + self.locals.insert(i); + } + self.super_projection_elem(local, proj_base, elem, context, location); + } +} diff --git a/compiler/rustc_mir/src/transform/mod.rs b/compiler/rustc_mir/src/transform/mod.rs index 226282fe426..fc9854ba499 100644 --- a/compiler/rustc_mir/src/transform/mod.rs +++ b/compiler/rustc_mir/src/transform/mod.rs @@ -24,6 +24,7 @@ pub mod cleanup_post_borrowck; pub mod const_prop; pub mod copy_prop; pub mod deaggregator; +pub mod dest_prop; pub mod dump_mir; pub mod elaborate_drops; pub mod generator; @@ -467,6 +468,7 @@ fn run_optimization_passes<'tcx>( &simplify_comparison_integral::SimplifyComparisonIntegral, &simplify_try::SimplifyArmIdentity, &simplify_try::SimplifyBranchSame, + &dest_prop::DestinationPropagation, ©_prop::CopyPropagation, &simplify_branches::SimplifyBranches::new("after-copy-prop"), &remove_noop_landing_pads::RemoveNoopLandingPads, diff --git a/compiler/rustc_mir/src/transform/nrvo.rs b/compiler/rustc_mir/src/transform/nrvo.rs index 3673b6a4aa2..1ffb5a87c47 100644 --- a/compiler/rustc_mir/src/transform/nrvo.rs +++ b/compiler/rustc_mir/src/transform/nrvo.rs @@ -36,6 +36,12 @@ impl<'tcx> MirPass<'tcx> for RenameReturnPlace { return; } + if tcx.sess.opts.debugging_opts.mir_opt_level >= 2 { + // The `DestinationPropagation` pass runs at level 2, so this pass is redundant (and + // fails some asserts). + return; + } + let returned_local = match local_eligible_for_nrvo(body) { Some(l) => l, None => { diff --git a/src/test/mir-opt/const_allocation.main.ConstProp.after.32bit.mir b/src/test/mir-opt/const_allocation.main.ConstProp.after.32bit.mir index a137d7fadba..8b09eade067 100644 --- a/src/test/mir-opt/const_allocation.main.ConstProp.after.32bit.mir +++ b/src/test/mir-opt/const_allocation.main.ConstProp.after.32bit.mir @@ -24,42 +24,42 @@ fn main() -> () { } alloc0 (static: FOO, size: 8, align: 4) { - ╾─alloc17─╼ 03 00 00 00 │ ╾──╼.... + ╾─alloc14─╼ 03 00 00 00 │ ╾──╼.... } -alloc17 (size: 48, align: 4) { +alloc14 (size: 48, align: 4) { 0x00 │ 00 00 00 00 __ __ __ __ ╾─alloc4──╼ 00 00 00 00 │ ....░░░░╾──╼.... - 0x10 │ 00 00 00 00 __ __ __ __ ╾─alloc8──╼ 02 00 00 00 │ ....░░░░╾──╼.... - 0x20 │ 01 00 00 00 2a 00 00 00 ╾─alloc13─╼ 03 00 00 00 │ ....*...╾──╼.... + 0x10 │ 00 00 00 00 __ __ __ __ ╾─alloc7──╼ 02 00 00 00 │ ....░░░░╾──╼.... + 0x20 │ 01 00 00 00 2a 00 00 00 ╾─alloc11─╼ 03 00 00 00 │ ....*...╾──╼.... } alloc4 (size: 0, align: 4) {} -alloc8 (size: 16, align: 4) { - ╾─alloc7──╼ 03 00 00 00 ╾─alloc9──╼ 03 00 00 00 │ ╾──╼....╾──╼.... +alloc7 (size: 16, align: 4) { + ╾─alloc6──╼ 03 00 00 00 ╾─alloc8──╼ 03 00 00 00 │ ╾──╼....╾──╼.... } -alloc7 (size: 3, align: 1) { +alloc6 (size: 3, align: 1) { 66 6f 6f │ foo } -alloc9 (size: 3, align: 1) { +alloc8 (size: 3, align: 1) { 62 61 72 │ bar } -alloc13 (size: 24, align: 4) { - 0x00 │ ╾─alloc12─╼ 03 00 00 00 ╾─alloc14─╼ 03 00 00 00 │ ╾──╼....╾──╼.... - 0x10 │ ╾─alloc15─╼ 04 00 00 00 │ ╾──╼.... +alloc11 (size: 24, align: 4) { + 0x00 │ ╾─alloc10─╼ 03 00 00 00 ╾─alloc12─╼ 03 00 00 00 │ ╾──╼....╾──╼.... + 0x10 │ ╾─alloc13─╼ 04 00 00 00 │ ╾──╼.... } -alloc12 (size: 3, align: 1) { +alloc10 (size: 3, align: 1) { 6d 65 68 │ meh } -alloc14 (size: 3, align: 1) { +alloc12 (size: 3, align: 1) { 6d 6f 70 │ mop } -alloc15 (size: 4, align: 1) { +alloc13 (size: 4, align: 1) { 6d c3 b6 70 │ m..p } diff --git a/src/test/mir-opt/const_allocation.main.ConstProp.after.64bit.mir b/src/test/mir-opt/const_allocation.main.ConstProp.after.64bit.mir index ef98cf9c091..2853a0ac18b 100644 --- a/src/test/mir-opt/const_allocation.main.ConstProp.after.64bit.mir +++ b/src/test/mir-opt/const_allocation.main.ConstProp.after.64bit.mir @@ -24,46 +24,46 @@ fn main() -> () { } alloc0 (static: FOO, size: 16, align: 8) { - ╾───────alloc17───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ + ╾───────alloc14───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ } -alloc17 (size: 72, align: 8) { +alloc14 (size: 72, align: 8) { 0x00 │ 00 00 00 00 __ __ __ __ ╾───────alloc4────────╼ │ ....░░░░╾──────╼ 0x10 │ 00 00 00 00 00 00 00 00 00 00 00 00 __ __ __ __ │ ............░░░░ - 0x20 │ ╾───────alloc8────────╼ 02 00 00 00 00 00 00 00 │ ╾──────╼........ - 0x30 │ 01 00 00 00 2a 00 00 00 ╾───────alloc13───────╼ │ ....*...╾──────╼ + 0x20 │ ╾───────alloc7────────╼ 02 00 00 00 00 00 00 00 │ ╾──────╼........ + 0x30 │ 01 00 00 00 2a 00 00 00 ╾───────alloc11───────╼ │ ....*...╾──────╼ 0x40 │ 03 00 00 00 00 00 00 00 │ ........ } alloc4 (size: 0, align: 8) {} -alloc8 (size: 32, align: 8) { - 0x00 │ ╾───────alloc7────────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ - 0x10 │ ╾───────alloc9────────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ +alloc7 (size: 32, align: 8) { + 0x00 │ ╾───────alloc6────────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ + 0x10 │ ╾───────alloc8────────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ } -alloc7 (size: 3, align: 1) { +alloc6 (size: 3, align: 1) { 66 6f 6f │ foo } -alloc9 (size: 3, align: 1) { +alloc8 (size: 3, align: 1) { 62 61 72 │ bar } -alloc13 (size: 48, align: 8) { - 0x00 │ ╾───────alloc12───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ - 0x10 │ ╾───────alloc14───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ - 0x20 │ ╾───────alloc15───────╼ 04 00 00 00 00 00 00 00 │ ╾──────╼........ +alloc11 (size: 48, align: 8) { + 0x00 │ ╾───────alloc10───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ + 0x10 │ ╾───────alloc12───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ + 0x20 │ ╾───────alloc13───────╼ 04 00 00 00 00 00 00 00 │ ╾──────╼........ } -alloc12 (size: 3, align: 1) { +alloc10 (size: 3, align: 1) { 6d 65 68 │ meh } -alloc14 (size: 3, align: 1) { +alloc12 (size: 3, align: 1) { 6d 6f 70 │ mop } -alloc15 (size: 4, align: 1) { +alloc13 (size: 4, align: 1) { 6d c3 b6 70 │ m..p } diff --git a/src/test/mir-opt/const_allocation2.main.ConstProp.after.32bit.mir b/src/test/mir-opt/const_allocation2.main.ConstProp.after.32bit.mir index c4f10064890..710ffeeda07 100644 --- a/src/test/mir-opt/const_allocation2.main.ConstProp.after.32bit.mir +++ b/src/test/mir-opt/const_allocation2.main.ConstProp.after.32bit.mir @@ -24,41 +24,41 @@ fn main() -> () { } alloc0 (static: FOO, size: 8, align: 4) { - ╾─alloc23─╼ 03 00 00 00 │ ╾──╼.... + ╾─alloc20─╼ 03 00 00 00 │ ╾──╼.... } -alloc23 (size: 48, align: 4) { +alloc20 (size: 48, align: 4) { 0x00 │ 00 00 00 00 __ __ __ __ ╾─alloc8──╼ 00 00 00 00 │ ....░░░░╾──╼.... - 0x10 │ 00 00 00 00 __ __ __ __ ╾─alloc13─╼ 02 00 00 00 │ ....░░░░╾──╼.... - 0x20 │ 01 00 00 00 2a 00 00 00 ╾─alloc21─╼ 03 00 00 00 │ ....*...╾──╼.... + 0x10 │ 00 00 00 00 __ __ __ __ ╾─alloc12─╼ 02 00 00 00 │ ....░░░░╾──╼.... + 0x20 │ 01 00 00 00 2a 00 00 00 ╾─alloc19─╼ 03 00 00 00 │ ....*...╾──╼.... } alloc8 (size: 0, align: 4) {} -alloc13 (size: 8, align: 4) { - ╾─alloc11─╼ ╾─alloc12─╼ │ ╾──╼╾──╼ +alloc12 (size: 8, align: 4) { + ╾─alloc10─╼ ╾─alloc11─╼ │ ╾──╼╾──╼ } -alloc11 (size: 1, align: 1) { +alloc10 (size: 1, align: 1) { 05 │ . } -alloc12 (size: 1, align: 1) { +alloc11 (size: 1, align: 1) { 06 │ . } -alloc21 (size: 12, align: 4) { - ╾─a17+0x3─╼ ╾─alloc18─╼ ╾─a20+0x2─╼ │ ╾──╼╾──╼╾──╼ +alloc19 (size: 12, align: 4) { + ╾─a15+0x3─╼ ╾─alloc16─╼ ╾─a18+0x2─╼ │ ╾──╼╾──╼╾──╼ } -alloc17 (size: 4, align: 1) { +alloc15 (size: 4, align: 1) { 2a 45 15 6f │ *E.o } -alloc18 (size: 1, align: 1) { +alloc16 (size: 1, align: 1) { 2a │ * } -alloc20 (size: 4, align: 1) { +alloc18 (size: 4, align: 1) { 2a 45 15 6f │ *E.o } diff --git a/src/test/mir-opt/const_allocation2.main.ConstProp.after.64bit.mir b/src/test/mir-opt/const_allocation2.main.ConstProp.after.64bit.mir index b16b85c4e95..97a7f76f6bb 100644 --- a/src/test/mir-opt/const_allocation2.main.ConstProp.after.64bit.mir +++ b/src/test/mir-opt/const_allocation2.main.ConstProp.after.64bit.mir @@ -24,44 +24,44 @@ fn main() -> () { } alloc0 (static: FOO, size: 16, align: 8) { - ╾───────alloc23───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ + ╾───────alloc20───────╼ 03 00 00 00 00 00 00 00 │ ╾──────╼........ } -alloc23 (size: 72, align: 8) { +alloc20 (size: 72, align: 8) { 0x00 │ 00 00 00 00 __ __ __ __ ╾───────alloc8────────╼ │ ....░░░░╾──────╼ 0x10 │ 00 00 00 00 00 00 00 00 00 00 00 00 __ __ __ __ │ ............░░░░ - 0x20 │ ╾───────alloc13───────╼ 02 00 00 00 00 00 00 00 │ ╾──────╼........ - 0x30 │ 01 00 00 00 2a 00 00 00 ╾───────alloc21───────╼ │ ....*...╾──────╼ + 0x20 │ ╾───────alloc12───────╼ 02 00 00 00 00 00 00 00 │ ╾──────╼........ + 0x30 │ 01 00 00 00 2a 00 00 00 ╾───────alloc19───────╼ │ ....*...╾──────╼ 0x40 │ 03 00 00 00 00 00 00 00 │ ........ } alloc8 (size: 0, align: 8) {} -alloc13 (size: 16, align: 8) { - ╾───────alloc11───────╼ ╾───────alloc12───────╼ │ ╾──────╼╾──────╼ +alloc12 (size: 16, align: 8) { + ╾───────alloc10───────╼ ╾───────alloc11───────╼ │ ╾──────╼╾──────╼ } -alloc11 (size: 1, align: 1) { +alloc10 (size: 1, align: 1) { 05 │ . } -alloc12 (size: 1, align: 1) { +alloc11 (size: 1, align: 1) { 06 │ . } -alloc21 (size: 24, align: 8) { - 0x00 │ ╾─────alloc17+0x3─────╼ ╾───────alloc18───────╼ │ ╾──────╼╾──────╼ - 0x10 │ ╾─────alloc20+0x2─────╼ │ ╾──────╼ +alloc19 (size: 24, align: 8) { + 0x00 │ ╾─────alloc15+0x3─────╼ ╾───────alloc16───────╼ │ ╾──────╼╾──────╼ + 0x10 │ ╾─────alloc18+0x2─────╼ │ ╾──────╼ } -alloc17 (size: 4, align: 1) { +alloc15 (size: 4, align: 1) { 2a 45 15 6f │ *E.o } -alloc18 (size: 1, align: 1) { +alloc16 (size: 1, align: 1) { 2a │ * } -alloc20 (size: 4, align: 1) { +alloc18 (size: 4, align: 1) { 2a 45 15 6f │ *E.o } diff --git a/src/test/mir-opt/const_allocation3.main.ConstProp.after.32bit.mir b/src/test/mir-opt/const_allocation3.main.ConstProp.after.32bit.mir index 99d3a278d69..19d6c51bc75 100644 --- a/src/test/mir-opt/const_allocation3.main.ConstProp.after.32bit.mir +++ b/src/test/mir-opt/const_allocation3.main.ConstProp.after.32bit.mir @@ -24,10 +24,10 @@ fn main() -> () { } alloc0 (static: FOO, size: 4, align: 4) { - ╾─alloc9──╼ │ ╾──╼ + ╾─alloc3──╼ │ ╾──╼ } -alloc9 (size: 168, align: 1) { +alloc3 (size: 168, align: 1) { 0x00 │ ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab │ ................ 0x10 │ ab ab ab ab ab ab ab ab ab ab ab ab ╾─alloc4──╼ │ ............╾──╼ 0x20 │ 01 ef cd ab 00 00 00 00 00 00 00 00 00 00 00 00 │ ................ diff --git a/src/test/mir-opt/const_allocation3.main.ConstProp.after.64bit.mir b/src/test/mir-opt/const_allocation3.main.ConstProp.after.64bit.mir index d6e49892d4c..94388b08c0e 100644 --- a/src/test/mir-opt/const_allocation3.main.ConstProp.after.64bit.mir +++ b/src/test/mir-opt/const_allocation3.main.ConstProp.after.64bit.mir @@ -24,10 +24,10 @@ fn main() -> () { } alloc0 (static: FOO, size: 8, align: 8) { - ╾───────alloc9────────╼ │ ╾──────╼ + ╾───────alloc3────────╼ │ ╾──────╼ } -alloc9 (size: 180, align: 1) { +alloc3 (size: 180, align: 1) { 0x00 │ ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab │ ................ 0x10 │ ab ab ab ab ab ab ab ab ab ab ab ab ╾──alloc4── │ ............╾─── 0x20 │ ──────────╼ 01 ef cd ab 00 00 00 00 00 00 00 00 │ ───╼............ diff --git a/src/test/mir-opt/copy_propagation.test.CopyPropagation.diff b/src/test/mir-opt/copy_propagation.test.CopyPropagation.diff index f2838638aca..1f3e559c1b7 100644 --- a/src/test/mir-opt/copy_propagation.test.CopyPropagation.diff +++ b/src/test/mir-opt/copy_propagation.test.CopyPropagation.diff @@ -6,19 +6,14 @@ let mut _0: u32; // return place in scope 0 at $DIR/copy_propagation.rs:3:20: 3:23 let _2: u32; // in scope 0 at $DIR/copy_propagation.rs:4:9: 4:10 scope 1 { -- debug y => _2; // in scope 1 at $DIR/copy_propagation.rs:4:9: 4:10 -+ debug y => _1; // in scope 1 at $DIR/copy_propagation.rs:4:9: 4:10 + debug y => _0; // in scope 1 at $DIR/copy_propagation.rs:4:9: 4:10 } bb0: { -- StorageLive(_2); // scope 0 at $DIR/copy_propagation.rs:4:9: 4:10 -- _2 = _1; // scope 0 at $DIR/copy_propagation.rs:4:13: 4:14 -- _0 = _2; // scope 1 at $DIR/copy_propagation.rs:5:5: 5:6 -- StorageDead(_2); // scope 0 at $DIR/copy_propagation.rs:6:1: 6:2 -+ nop; // scope 0 at $DIR/copy_propagation.rs:4:9: 4:10 -+ nop; // scope 0 at $DIR/copy_propagation.rs:4:13: 4:14 -+ _0 = _1; // scope 1 at $DIR/copy_propagation.rs:5:5: 5:6 -+ nop; // scope 0 at $DIR/copy_propagation.rs:6:1: 6:2 + nop; // scope 0 at $DIR/copy_propagation.rs:4:9: 4:10 + _0 = _1; // scope 0 at $DIR/copy_propagation.rs:4:13: 4:14 + nop; // scope 1 at $DIR/copy_propagation.rs:5:5: 5:6 + nop; // scope 0 at $DIR/copy_propagation.rs:6:1: 6:2 return; // scope 0 at $DIR/copy_propagation.rs:6:2: 6:2 } } diff --git a/src/test/mir-opt/copy_propagation_arg.arg_src.CopyPropagation.diff b/src/test/mir-opt/copy_propagation_arg.arg_src.CopyPropagation.diff index a4d60ae25d0..8aab2299d26 100644 --- a/src/test/mir-opt/copy_propagation_arg.arg_src.CopyPropagation.diff +++ b/src/test/mir-opt/copy_propagation_arg.arg_src.CopyPropagation.diff @@ -6,15 +6,15 @@ let mut _0: i32; // return place in scope 0 at $DIR/copy_propagation_arg.rs:27:27: 27:30 let _2: i32; // in scope 0 at $DIR/copy_propagation_arg.rs:28:9: 28:10 scope 1 { - debug y => _2; // in scope 1 at $DIR/copy_propagation_arg.rs:28:9: 28:10 + debug y => _0; // in scope 1 at $DIR/copy_propagation_arg.rs:28:9: 28:10 } bb0: { - StorageLive(_2); // scope 0 at $DIR/copy_propagation_arg.rs:28:9: 28:10 - _2 = _1; // scope 0 at $DIR/copy_propagation_arg.rs:28:13: 28:14 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:28:9: 28:10 + _0 = _1; // scope 0 at $DIR/copy_propagation_arg.rs:28:13: 28:14 _1 = const 123_i32; // scope 1 at $DIR/copy_propagation_arg.rs:29:5: 29:12 - _0 = _2; // scope 1 at $DIR/copy_propagation_arg.rs:30:5: 30:6 - StorageDead(_2); // scope 0 at $DIR/copy_propagation_arg.rs:31:1: 31:2 + nop; // scope 1 at $DIR/copy_propagation_arg.rs:30:5: 30:6 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:31:1: 31:2 return; // scope 0 at $DIR/copy_propagation_arg.rs:31:2: 31:2 } } diff --git a/src/test/mir-opt/copy_propagation_arg.baz.CopyPropagation.diff b/src/test/mir-opt/copy_propagation_arg.baz.CopyPropagation.diff index b20003bd7c6..1ea51fec710 100644 --- a/src/test/mir-opt/copy_propagation_arg.baz.CopyPropagation.diff +++ b/src/test/mir-opt/copy_propagation_arg.baz.CopyPropagation.diff @@ -7,10 +7,10 @@ let mut _2: i32; // in scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 bb0: { - StorageLive(_2); // scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 - _2 = _1; // scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 - _1 = move _2; // scope 0 at $DIR/copy_propagation_arg.rs:23:5: 23:10 - StorageDead(_2); // scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:23:5: 23:10 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:23:9: 23:10 _0 = const (); // scope 0 at $DIR/copy_propagation_arg.rs:21:20: 24:2 return; // scope 0 at $DIR/copy_propagation_arg.rs:24:2: 24:2 } diff --git a/src/test/mir-opt/copy_propagation_arg.foo.CopyPropagation.diff b/src/test/mir-opt/copy_propagation_arg.foo.CopyPropagation.diff index d07a4c0541e..48ab37a239c 100644 --- a/src/test/mir-opt/copy_propagation_arg.foo.CopyPropagation.diff +++ b/src/test/mir-opt/copy_propagation_arg.foo.CopyPropagation.diff @@ -8,10 +8,10 @@ let mut _3: u8; // in scope 0 at $DIR/copy_propagation_arg.rs:11:15: 11:16 bb0: { - StorageLive(_2); // scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17 StorageLive(_3); // scope 0 at $DIR/copy_propagation_arg.rs:11:15: 11:16 _3 = _1; // scope 0 at $DIR/copy_propagation_arg.rs:11:15: 11:16 - _2 = dummy(move _3) -> bb1; // scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17 + _1 = dummy(move _3) -> bb1; // scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17 // mir::Constant // + span: $DIR/copy_propagation_arg.rs:11:9: 11:14 // + literal: Const { ty: fn(u8) -> u8 {dummy}, val: Value(Scalar(<ZST>)) } @@ -19,8 +19,8 @@ bb1: { StorageDead(_3); // scope 0 at $DIR/copy_propagation_arg.rs:11:16: 11:17 - _1 = move _2; // scope 0 at $DIR/copy_propagation_arg.rs:11:5: 11:17 - StorageDead(_2); // scope 0 at $DIR/copy_propagation_arg.rs:11:16: 11:17 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:11:5: 11:17 + nop; // scope 0 at $DIR/copy_propagation_arg.rs:11:16: 11:17 _0 = const (); // scope 0 at $DIR/copy_propagation_arg.rs:9:19: 12:2 return; // scope 0 at $DIR/copy_propagation_arg.rs:12:2: 12:2 } diff --git a/src/test/mir-opt/dest-prop/branch.main.DestinationPropagation.diff b/src/test/mir-opt/dest-prop/branch.main.DestinationPropagation.diff new file mode 100644 index 00000000000..9c213eaed3c --- /dev/null +++ b/src/test/mir-opt/dest-prop/branch.main.DestinationPropagation.diff @@ -0,0 +1,73 @@ +- // MIR for `main` before DestinationPropagation ++ // MIR for `main` after DestinationPropagation + + fn main() -> () { + let mut _0: (); // return place in scope 0 at $DIR/branch.rs:12:11: 12:11 + let _1: i32; // in scope 0 at $DIR/branch.rs:13:9: 13:10 + let mut _3: bool; // in scope 0 at $DIR/branch.rs:15:16: 15:22 + let _4: i32; // in scope 0 at $DIR/branch.rs:18:9: 18:14 + scope 1 { +- debug x => _1; // in scope 1 at $DIR/branch.rs:13:9: 13:10 ++ debug x => _2; // in scope 1 at $DIR/branch.rs:13:9: 13:10 + let _2: i32; // in scope 1 at $DIR/branch.rs:15:9: 15:10 + scope 2 { + debug y => _2; // in scope 2 at $DIR/branch.rs:15:9: 15:10 + } + } + + bb0: { +- StorageLive(_1); // scope 0 at $DIR/branch.rs:13:9: 13:10 +- _1 = val() -> bb1; // scope 0 at $DIR/branch.rs:13:13: 13:18 ++ nop; // scope 0 at $DIR/branch.rs:13:9: 13:10 ++ _2 = val() -> bb1; // scope 0 at $DIR/branch.rs:13:13: 13:18 + // mir::Constant + // + span: $DIR/branch.rs:13:13: 13:16 + // + literal: Const { ty: fn() -> i32 {val}, val: Value(Scalar(<ZST>)) } + } + + bb1: { +- StorageLive(_2); // scope 1 at $DIR/branch.rs:15:9: 15:10 ++ nop; // scope 1 at $DIR/branch.rs:15:9: 15:10 + StorageLive(_3); // scope 1 at $DIR/branch.rs:15:16: 15:22 + _3 = cond() -> bb2; // scope 1 at $DIR/branch.rs:15:16: 15:22 + // mir::Constant + // + span: $DIR/branch.rs:15:16: 15:20 + // + literal: Const { ty: fn() -> bool {cond}, val: Value(Scalar(<ZST>)) } + } + + bb2: { + switchInt(_3) -> [false: bb3, otherwise: bb4]; // scope 1 at $DIR/branch.rs:15:13: 20:6 + } + + bb3: { + StorageLive(_4); // scope 1 at $DIR/branch.rs:18:9: 18:14 + _4 = val() -> bb5; // scope 1 at $DIR/branch.rs:18:9: 18:14 + // mir::Constant + // + span: $DIR/branch.rs:18:9: 18:12 + // + literal: Const { ty: fn() -> i32 {val}, val: Value(Scalar(<ZST>)) } + } + + bb4: { +- _2 = _1; // scope 1 at $DIR/branch.rs:16:9: 16:10 ++ nop; // scope 1 at $DIR/branch.rs:16:9: 16:10 + goto -> bb6; // scope 1 at $DIR/branch.rs:15:13: 20:6 + } + + bb5: { + StorageDead(_4); // scope 1 at $DIR/branch.rs:18:14: 18:15 +- _2 = _1; // scope 1 at $DIR/branch.rs:19:9: 19:10 ++ nop; // scope 1 at $DIR/branch.rs:19:9: 19:10 + goto -> bb6; // scope 1 at $DIR/branch.rs:15:13: 20:6 + } + + bb6: { + StorageDead(_3); // scope 1 at $DIR/branch.rs:20:6: 20:7 + _0 = const (); // scope 0 at $DIR/branch.rs:12:11: 21:2 +- StorageDead(_2); // scope 1 at $DIR/branch.rs:21:1: 21:2 +- StorageDead(_1); // scope 0 at $DIR/branch.rs:21:1: 21:2 ++ nop; // scope 1 at $DIR/branch.rs:21:1: 21:2 ++ nop; // scope 0 at $DIR/branch.rs:21:1: 21:2 + return; // scope 0 at $DIR/branch.rs:21:2: 21:2 + } + } + diff --git a/src/test/mir-opt/dest-prop/branch.rs b/src/test/mir-opt/dest-prop/branch.rs new file mode 100644 index 00000000000..7e0e40671dd --- /dev/null +++ b/src/test/mir-opt/dest-prop/branch.rs @@ -0,0 +1,21 @@ +//! Tests that assignment in both branches of an `if` are eliminated. + +fn val() -> i32 { + 1 +} + +fn cond() -> bool { + true +} + +// EMIT_MIR branch.main.DestinationPropagation.diff +fn main() { + let x = val(); + + let y = if cond() { + x + } else { + val(); + x + }; +} diff --git a/src/test/mir-opt/dest-prop/cycle.main.DestinationPropagation.diff b/src/test/mir-opt/dest-prop/cycle.main.DestinationPropagation.diff new file mode 100644 index 00000000000..dd717c1b9c3 --- /dev/null +++ b/src/test/mir-opt/dest-prop/cycle.main.DestinationPropagation.diff @@ -0,0 +1,76 @@ +- // MIR for `main` before DestinationPropagation ++ // MIR for `main` after DestinationPropagation + + fn main() -> () { + let mut _0: (); // return place in scope 0 at $DIR/cycle.rs:8:11: 8:11 + let mut _1: i32; // in scope 0 at $DIR/cycle.rs:9:9: 9:14 + let mut _4: i32; // in scope 0 at $DIR/cycle.rs:12:9: 12:10 + let _5: (); // in scope 0 at $DIR/cycle.rs:14:5: 14:12 + let mut _6: i32; // in scope 0 at $DIR/cycle.rs:14:10: 14:11 + scope 1 { +- debug x => _1; // in scope 1 at $DIR/cycle.rs:9:9: 9:14 ++ debug x => _4; // in scope 1 at $DIR/cycle.rs:9:9: 9:14 + let _2: i32; // in scope 1 at $DIR/cycle.rs:10:9: 10:10 + scope 2 { +- debug y => _2; // in scope 2 at $DIR/cycle.rs:10:9: 10:10 ++ debug y => _4; // in scope 2 at $DIR/cycle.rs:10:9: 10:10 + let _3: i32; // in scope 2 at $DIR/cycle.rs:11:9: 11:10 + scope 3 { +- debug z => _3; // in scope 3 at $DIR/cycle.rs:11:9: 11:10 ++ debug z => _4; // in scope 3 at $DIR/cycle.rs:11:9: 11:10 + scope 4 { + debug _x => _6; // in scope 4 at $SRC_DIR/core/src/mem/mod.rs:LL:COL + } + } + } + } + + bb0: { +- StorageLive(_1); // scope 0 at $DIR/cycle.rs:9:9: 9:14 +- _1 = val() -> bb1; // scope 0 at $DIR/cycle.rs:9:17: 9:22 ++ nop; // scope 0 at $DIR/cycle.rs:9:9: 9:14 ++ _4 = val() -> bb1; // scope 0 at $DIR/cycle.rs:9:17: 9:22 + // mir::Constant + // + span: $DIR/cycle.rs:9:17: 9:20 + // + literal: Const { ty: fn() -> i32 {val}, val: Value(Scalar(<ZST>)) } + } + + bb1: { +- StorageLive(_2); // scope 1 at $DIR/cycle.rs:10:9: 10:10 +- _2 = _1; // scope 1 at $DIR/cycle.rs:10:13: 10:14 +- StorageLive(_3); // scope 2 at $DIR/cycle.rs:11:9: 11:10 +- _3 = _2; // scope 2 at $DIR/cycle.rs:11:13: 11:14 +- StorageLive(_4); // scope 3 at $DIR/cycle.rs:12:9: 12:10 +- _4 = _3; // scope 3 at $DIR/cycle.rs:12:9: 12:10 +- _1 = move _4; // scope 3 at $DIR/cycle.rs:12:5: 12:10 +- StorageDead(_4); // scope 3 at $DIR/cycle.rs:12:9: 12:10 ++ nop; // scope 1 at $DIR/cycle.rs:10:9: 10:10 ++ nop; // scope 1 at $DIR/cycle.rs:10:13: 10:14 ++ nop; // scope 2 at $DIR/cycle.rs:11:9: 11:10 ++ nop; // scope 2 at $DIR/cycle.rs:11:13: 11:14 ++ nop; // scope 3 at $DIR/cycle.rs:12:9: 12:10 ++ nop; // scope 3 at $DIR/cycle.rs:12:9: 12:10 ++ nop; // scope 3 at $DIR/cycle.rs:12:5: 12:10 ++ nop; // scope 3 at $DIR/cycle.rs:12:9: 12:10 + StorageLive(_5); // scope 3 at $DIR/cycle.rs:14:5: 14:12 + StorageLive(_6); // scope 3 at $DIR/cycle.rs:14:10: 14:11 +- _6 = _1; // scope 3 at $DIR/cycle.rs:14:10: 14:11 ++ _6 = _4; // scope 3 at $DIR/cycle.rs:14:10: 14:11 + _5 = const (); // scope 4 at $SRC_DIR/core/src/mem/mod.rs:LL:COL + drop(_6) -> bb2; // scope 4 at $SRC_DIR/core/src/mem/mod.rs:LL:COL + } + + bb2: { + StorageDead(_6); // scope 3 at $DIR/cycle.rs:14:11: 14:12 + StorageDead(_5); // scope 3 at $DIR/cycle.rs:14:12: 14:13 + _0 = const (); // scope 0 at $DIR/cycle.rs:8:11: 15:2 +- StorageDead(_3); // scope 2 at $DIR/cycle.rs:15:1: 15:2 +- StorageDead(_2); // scope 1 at $DIR/cycle.rs:15:1: 15:2 +- StorageDead(_1); // scope 0 at $DIR/cycle.rs:15:1: 15:2 ++ nop; // scope 2 at $DIR/cycle.rs:15:1: 15:2 ++ nop; // scope 1 at $DIR/cycle.rs:15:1: 15:2 ++ nop; // scope 0 at $DIR/cycle.rs:15:1: 15:2 + return; // scope 0 at $DIR/cycle.rs:15:2: 15:2 + } + } + diff --git a/src/test/mir-opt/dest-prop/cycle.rs b/src/test/mir-opt/dest-prop/cycle.rs new file mode 100644 index 00000000000..7fbffb13359 --- /dev/null +++ b/src/test/mir-opt/dest-prop/cycle.rs @@ -0,0 +1,15 @@ +//! Tests that cyclic assignments don't hang DestinationPropagation, and result in reasonable code. + +fn val() -> i32 { + 1 +} + +// EMIT_MIR cycle.main.DestinationPropagation.diff +fn main() { + let mut x = val(); + let y = x; + let z = y; + x = z; + + drop(x); +} diff --git a/src/test/mir-opt/dest-prop/simple.nrvo.DestinationPropagation.diff b/src/test/mir-opt/dest-prop/simple.nrvo.DestinationPropagation.diff new file mode 100644 index 00000000000..1277c51f2a0 --- /dev/null +++ b/src/test/mir-opt/dest-prop/simple.nrvo.DestinationPropagation.diff @@ -0,0 +1,45 @@ +- // MIR for `nrvo` before DestinationPropagation ++ // MIR for `nrvo` after DestinationPropagation + + fn nrvo(_1: for<'r> fn(&'r mut [u8; 1024])) -> [u8; 1024] { + debug init => _1; // in scope 0 at $DIR/simple.rs:4:9: 4:13 + let mut _0: [u8; 1024]; // return place in scope 0 at $DIR/simple.rs:4:39: 4:49 + let mut _2: [u8; 1024]; // in scope 0 at $DIR/simple.rs:5:9: 5:16 + let _3: (); // in scope 0 at $DIR/simple.rs:6:5: 6:19 + let mut _4: for<'r> fn(&'r mut [u8; 1024]); // in scope 0 at $DIR/simple.rs:6:5: 6:9 + let mut _5: &mut [u8; 1024]; // in scope 0 at $DIR/simple.rs:6:10: 6:18 + let mut _6: &mut [u8; 1024]; // in scope 0 at $DIR/simple.rs:6:10: 6:18 + scope 1 { +- debug buf => _2; // in scope 1 at $DIR/simple.rs:5:9: 5:16 ++ debug buf => _0; // in scope 1 at $DIR/simple.rs:5:9: 5:16 + } + + bb0: { +- StorageLive(_2); // scope 0 at $DIR/simple.rs:5:9: 5:16 +- _2 = [const 0_u8; 1024]; // scope 0 at $DIR/simple.rs:5:19: 5:28 ++ nop; // scope 0 at $DIR/simple.rs:5:9: 5:16 ++ _0 = [const 0_u8; 1024]; // scope 0 at $DIR/simple.rs:5:19: 5:28 + StorageLive(_3); // scope 1 at $DIR/simple.rs:6:5: 6:19 + StorageLive(_4); // scope 1 at $DIR/simple.rs:6:5: 6:9 + _4 = _1; // scope 1 at $DIR/simple.rs:6:5: 6:9 + StorageLive(_5); // scope 1 at $DIR/simple.rs:6:10: 6:18 + StorageLive(_6); // scope 1 at $DIR/simple.rs:6:10: 6:18 +- _6 = &mut _2; // scope 1 at $DIR/simple.rs:6:10: 6:18 ++ _6 = &mut _0; // scope 1 at $DIR/simple.rs:6:10: 6:18 + _5 = &mut (*_6); // scope 1 at $DIR/simple.rs:6:10: 6:18 + _3 = move _4(move _5) -> bb1; // scope 1 at $DIR/simple.rs:6:5: 6:19 + } + + bb1: { + StorageDead(_5); // scope 1 at $DIR/simple.rs:6:18: 6:19 + StorageDead(_4); // scope 1 at $DIR/simple.rs:6:18: 6:19 + StorageDead(_6); // scope 1 at $DIR/simple.rs:6:19: 6:20 + StorageDead(_3); // scope 1 at $DIR/simple.rs:6:19: 6:20 +- _0 = _2; // scope 1 at $DIR/simple.rs:7:5: 7:8 +- StorageDead(_2); // scope 0 at $DIR/simple.rs:8:1: 8:2 ++ nop; // scope 1 at $DIR/simple.rs:7:5: 7:8 ++ nop; // scope 0 at $DIR/simple.rs:8:1: 8:2 + return; // scope 0 at $DIR/simple.rs:8:2: 8:2 + } + } + diff --git a/src/test/mir-opt/dest-prop/simple.rs b/src/test/mir-opt/dest-prop/simple.rs new file mode 100644 index 00000000000..4655f966998 --- /dev/null +++ b/src/test/mir-opt/dest-prop/simple.rs @@ -0,0 +1,14 @@ +//! Copy of `nrvo-simple.rs`, to ensure that full dest-prop handles it too. + +// EMIT_MIR simple.nrvo.DestinationPropagation.diff +fn nrvo(init: fn(&mut [u8; 1024])) -> [u8; 1024] { + let mut buf = [0; 1024]; + init(&mut buf); + buf +} + +fn main() { + let _ = nrvo(|buf| { + buf[4] = 4; + }); +} diff --git a/src/test/mir-opt/dest-prop/union.main.DestinationPropagation.diff b/src/test/mir-opt/dest-prop/union.main.DestinationPropagation.diff new file mode 100644 index 00000000000..871f6e35043 --- /dev/null +++ b/src/test/mir-opt/dest-prop/union.main.DestinationPropagation.diff @@ -0,0 +1,46 @@ +- // MIR for `main` before DestinationPropagation ++ // MIR for `main` after DestinationPropagation + + fn main() -> () { + let mut _0: (); // return place in scope 0 at $DIR/union.rs:8:11: 8:11 + let _1: main::Un; // in scope 0 at $DIR/union.rs:13:9: 13:11 + let mut _2: u32; // in scope 0 at $DIR/union.rs:13:23: 13:28 + let _3: (); // in scope 0 at $DIR/union.rs:15:5: 15:27 + let mut _4: u32; // in scope 0 at $DIR/union.rs:15:10: 15:26 + scope 1 { + debug un => _1; // in scope 1 at $DIR/union.rs:13:9: 13:11 + scope 2 { + } + scope 3 { + debug _x => _4; // in scope 3 at $SRC_DIR/core/src/mem/mod.rs:LL:COL + } + } + + bb0: { + StorageLive(_1); // scope 0 at $DIR/union.rs:13:9: 13:11 + StorageLive(_2); // scope 0 at $DIR/union.rs:13:23: 13:28 + _2 = val() -> bb1; // scope 0 at $DIR/union.rs:13:23: 13:28 + // mir::Constant + // + span: $DIR/union.rs:13:23: 13:26 + // + literal: Const { ty: fn() -> u32 {val}, val: Value(Scalar(<ZST>)) } + } + + bb1: { + (_1.0: u32) = move _2; // scope 0 at $DIR/union.rs:13:14: 13:30 + StorageDead(_2); // scope 0 at $DIR/union.rs:13:29: 13:30 + StorageLive(_3); // scope 1 at $DIR/union.rs:15:5: 15:27 + StorageLive(_4); // scope 1 at $DIR/union.rs:15:10: 15:26 + _4 = (_1.0: u32); // scope 2 at $DIR/union.rs:15:19: 15:24 + _3 = const (); // scope 3 at $SRC_DIR/core/src/mem/mod.rs:LL:COL + drop(_4) -> bb2; // scope 3 at $SRC_DIR/core/src/mem/mod.rs:LL:COL + } + + bb2: { + StorageDead(_4); // scope 1 at $DIR/union.rs:15:26: 15:27 + StorageDead(_3); // scope 1 at $DIR/union.rs:15:27: 15:28 + _0 = const (); // scope 0 at $DIR/union.rs:8:11: 16:2 + StorageDead(_1); // scope 0 at $DIR/union.rs:16:1: 16:2 + return; // scope 0 at $DIR/union.rs:16:2: 16:2 + } + } + diff --git a/src/test/mir-opt/dest-prop/union.rs b/src/test/mir-opt/dest-prop/union.rs new file mode 100644 index 00000000000..b9d831389e8 --- /dev/null +++ b/src/test/mir-opt/dest-prop/union.rs @@ -0,0 +1,16 @@ +//! Tests that projections through unions cancel `DestinationPropagation`. + +fn val() -> u32 { + 1 +} + +// EMIT_MIR union.main.DestinationPropagation.diff +fn main() { + union Un { + us: u32, + } + + let un = Un { us: val() }; + + drop(unsafe { un.us }); +} diff --git a/src/test/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir b/src/test/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir index 0258e3c2e4b..ab194cf532f 100644 --- a/src/test/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir +++ b/src/test/mir-opt/inline/inline_closure_captures.foo.Inline.after.mir @@ -10,15 +10,14 @@ fn foo(_1: T, _2: i32) -> (i32, T) { let mut _6: &[closure@foo<T>::{{closure}}#0 q:&i32, t:&T]; // in scope 0 at $DIR/inline-closure-captures.rs:12:5: 12:6 let mut _7: (i32,); // in scope 0 at $DIR/inline-closure-captures.rs:12:5: 12:9 let mut _8: i32; // in scope 0 at $DIR/inline-closure-captures.rs:12:7: 12:8 - let mut _11: i32; // in scope 0 at $DIR/inline-closure-captures.rs:12:5: 12:9 + let mut _10: i32; // in scope 0 at $DIR/inline-closure-captures.rs:12:5: 12:9 scope 1 { debug x => _3; // in scope 1 at $DIR/inline-closure-captures.rs:11:9: 11:10 scope 2 { - debug _q => _11; // in scope 2 at $DIR/inline-closure-captures.rs:11:14: 11:16 + debug _q => _10; // in scope 2 at $DIR/inline-closure-captures.rs:11:14: 11:16 debug q => (*((*_6).0: &i32)); // in scope 2 at $DIR/inline-closure-captures.rs:10:23: 10:24 debug t => (*((*_6).1: &T)); // in scope 2 at $DIR/inline-closure-captures.rs:10:17: 10:18 - let mut _9: i32; // in scope 2 at $DIR/inline-closure-captures.rs:12:5: 12:9 - let mut _10: T; // in scope 2 at $DIR/inline-closure-captures.rs:12:5: 12:9 + let mut _9: T; // in scope 2 at $DIR/inline-closure-captures.rs:12:5: 12:9 } } @@ -38,17 +37,14 @@ fn foo(_1: T, _2: i32) -> (i32, T) { StorageLive(_8); // scope 1 at $DIR/inline-closure-captures.rs:12:7: 12:8 _8 = _2; // scope 1 at $DIR/inline-closure-captures.rs:12:7: 12:8 (_7.0: i32) = move _8; // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 - StorageLive(_11); // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 - _11 = move (_7.0: i32); // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 - StorageLive(_9); // scope 2 at $DIR/inline-closure-captures.rs:11:19: 11:20 - _9 = (*((*_6).0: &i32)); // scope 2 at $DIR/inline-closure-captures.rs:11:19: 11:20 - StorageLive(_10); // scope 2 at $DIR/inline-closure-captures.rs:11:22: 11:23 - _10 = (*((*_6).1: &T)); // scope 2 at $DIR/inline-closure-captures.rs:11:22: 11:23 - (_0.0: i32) = move _9; // scope 2 at $DIR/inline-closure-captures.rs:11:18: 11:24 - (_0.1: T) = move _10; // scope 2 at $DIR/inline-closure-captures.rs:11:18: 11:24 - StorageDead(_10); // scope 2 at $DIR/inline-closure-captures.rs:11:23: 11:24 + StorageLive(_10); // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 + _10 = move (_7.0: i32); // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 + (_0.0: i32) = (*((*_6).0: &i32)); // scope 2 at $DIR/inline-closure-captures.rs:11:19: 11:20 + StorageLive(_9); // scope 2 at $DIR/inline-closure-captures.rs:11:22: 11:23 + _9 = (*((*_6).1: &T)); // scope 2 at $DIR/inline-closure-captures.rs:11:22: 11:23 + (_0.1: T) = move _9; // scope 2 at $DIR/inline-closure-captures.rs:11:18: 11:24 StorageDead(_9); // scope 2 at $DIR/inline-closure-captures.rs:11:23: 11:24 - StorageDead(_11); // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 + StorageDead(_10); // scope 1 at $DIR/inline-closure-captures.rs:12:5: 12:9 StorageDead(_8); // scope 1 at $DIR/inline-closure-captures.rs:12:8: 12:9 StorageDead(_7); // scope 1 at $DIR/inline-closure-captures.rs:12:8: 12:9 StorageDead(_6); // scope 1 at $DIR/inline-closure-captures.rs:12:8: 12:9 diff --git a/src/test/mir-opt/issue_73223.main.PreCodegen.32bit.diff b/src/test/mir-opt/issue_73223.main.PreCodegen.32bit.diff index f86755cfa7f..a8662b96566 100644 --- a/src/test/mir-opt/issue_73223.main.PreCodegen.32bit.diff +++ b/src/test/mir-opt/issue_73223.main.PreCodegen.32bit.diff @@ -3,66 +3,59 @@ fn main() -> () { let mut _0: (); // return place in scope 0 at $DIR/issue-73223.rs:1:11: 1:11 - let mut _1: std::option::Option<i32>; // in scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - let _2: i32; // in scope 0 at $DIR/issue-73223.rs:3:14: 3:15 - let mut _4: i32; // in scope 0 at $DIR/issue-73223.rs:7:22: 7:27 - let mut _5: (&i32, &i32); // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _6: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _9: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _10: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _11: i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _12: &std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let _13: std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _14: &[&str]; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _15: &[std::fmt::ArgumentV1]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let _16: &[std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let _17: [std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _18: (&&i32, &&i32); // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _19: &&i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _20: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _21: &&i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _24: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _25: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _26: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _27: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let _1: i32; // in scope 0 at $DIR/issue-73223.rs:2:9: 2:14 + let mut _2: std::option::Option<i32>; // in scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + let mut _4: (&i32, &i32); // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _5: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _6: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _7: i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _8: &std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let _9: std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _10: &[std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let _11: [std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _12: (&&i32, &&i32); // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let _13: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _14: &&i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let _15: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _16: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _17: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL scope 1 { - debug split => _2; // in scope 1 at $DIR/issue-73223.rs:2:9: 2:14 + debug split => _1; // in scope 1 at $DIR/issue-73223.rs:2:9: 2:14 let _3: std::option::Option<i32>; // in scope 1 at $DIR/issue-73223.rs:7:9: 7:14 scope 3 { debug _prev => _3; // in scope 3 at $DIR/issue-73223.rs:7:9: 7:14 - let _7: &i32; // in scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _8: &i32; // in scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL scope 4 { - debug left_val => _7; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - debug right_val => _8; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _22: &&i32; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _23: &&i32; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + debug left_val => _13; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + debug right_val => _15; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL scope 5 { - debug arg0 => _22; // in scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + debug arg0 => _20; // in scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL debug arg1 => _23; // in scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL scope 6 { - debug x => _22; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - debug f => _25; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - let mut _28: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _29: &core::fmt::Opaque; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL + debug x => _20; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + debug f => _19; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + let mut _18: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _19: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _20: &&i32; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL } scope 8 { debug x => _23; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - debug f => _27; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - let mut _30: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _31: &core::fmt::Opaque; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL + debug f => _22; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + let mut _21: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _22: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _23: &&i32; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL } } scope 10 { - debug pieces => _14; // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - debug args => _15; // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - let mut _32: std::option::Option<&[std::fmt::rt::v1::Argument]>; // in scope 10 at $SRC_DIR/std/src/macros.rs:LL:COL + debug pieces => (_9.0: &[&str]); // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + debug args => _25; // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + let mut _24: std::option::Option<&[std::fmt::rt::v1::Argument]>; // in scope 10 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _25: &[std::fmt::ArgumentV1]; // in scope 10 at $SRC_DIR/std/src/macros.rs:LL:COL } } } } scope 2 { - debug v => _2; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15 + debug v => _1; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15 } scope 7 { } @@ -70,138 +63,108 @@ } bb0: { - StorageLive(_1); // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - ((_1 as Some).0: i32) = const 1_i32; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - discriminant(_1) = 1; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - _2 = ((_1 as Some).0: i32); // scope 0 at $DIR/issue-73223.rs:3:14: 3:15 - StorageDead(_1); // scope 0 at $DIR/issue-73223.rs:5:6: 5:7 - StorageLive(_3); // scope 1 at $DIR/issue-73223.rs:7:9: 7:14 - StorageLive(_4); // scope 1 at $DIR/issue-73223.rs:7:22: 7:27 - _4 = _2; // scope 1 at $DIR/issue-73223.rs:7:22: 7:27 - ((_3 as Some).0: i32) = move _4; // scope 1 at $DIR/issue-73223.rs:7:17: 7:28 + StorageLive(_2); // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + ((_2 as Some).0: i32) = const 1_i32; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + discriminant(_2) = 1; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + _1 = ((_2 as Some).0: i32); // scope 0 at $DIR/issue-73223.rs:3:14: 3:15 + StorageDead(_2); // scope 0 at $DIR/issue-73223.rs:5:6: 5:7 + ((_3 as Some).0: i32) = _1; // scope 1 at $DIR/issue-73223.rs:7:22: 7:27 discriminant(_3) = 1; // scope 1 at $DIR/issue-73223.rs:7:17: 7:28 - StorageDead(_4); // scope 1 at $DIR/issue-73223.rs:7:27: 7:28 - StorageLive(_5); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_6); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _6 = &_2; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - (_5.0: &i32) = move _6; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - (_5.1: &i32) = const main::promoted[1]; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_4.0: &i32) = &_1; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_4.1: &i32) = const main::promoted[1]; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // ty::Const // + ty: &i32 // + val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[1])) // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: &i32, val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[1])) } - StorageDead(_6); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_7); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _7 = (_5.0: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _8 = (_5.1: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_9); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_10); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_11); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _11 = (*_7); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _10 = Eq(move _11, const 1_i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_11); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _9 = Not(move _10); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_10); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - switchInt(_9) -> [false: bb1, otherwise: bb2]; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _13 = (_4.0: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _15 = (_4.1: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_5); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_6); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_7); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _7 = (*_13); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _6 = Eq(move _7, const 1_i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageDead(_7); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _5 = Not(move _6); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageDead(_6); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + switchInt(_5) -> [false: bb1, otherwise: bb2]; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL } bb1: { - StorageDead(_9); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_7); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_5); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageDead(_5); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL _0 = const (); // scope 0 at $DIR/issue-73223.rs:1:11: 9:2 - StorageDead(_3); // scope 1 at $DIR/issue-73223.rs:9:1: 9:2 return; // scope 0 at $DIR/issue-73223.rs:9:2: 9:2 } bb2: { - StorageLive(_13); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - _14 = const main::promoted[0] as &[&str] (Pointer(Unsize)); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_9.0: &[&str]) = const main::promoted[0] as &[&str] (Pointer(Unsize)); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // ty::Const // + ty: &[&str; 3] // + val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[0])) // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: &[&str; 3], val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[0])) } - StorageLive(_17); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageLive(_18); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageLive(_19); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_20); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _20 = _7; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _19 = &_20; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_21); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _21 = &_8; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - (_18.0: &&i32) = move _19; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - (_18.1: &&i32) = move _21; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_21); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_19); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - _22 = (_18.0: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _23 = (_18.1: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_24); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - _25 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_11); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + (_12.0: &&i32) = &_13; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_14); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _14 = &_15; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_12.1: &&i32) = move _14; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + StorageDead(_14); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + _20 = (_12.0: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _23 = (_12.1: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _19 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {<&i32 as std::fmt::Debug>::fmt}, val: Value(Scalar(<ZST>)) } - StorageLive(_28); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _28 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _25) -> bb3; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageLive(_18); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _18 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _19) -> bb3; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) -> for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {std::intrinsics::transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>}, val: Value(Scalar(<ZST>)) } } bb3: { - StorageLive(_29); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _29 = transmute::<&&i32, &core::fmt::Opaque>(move _22) -> bb4; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_16.0: &core::fmt::Opaque) = transmute::<&&i32, &core::fmt::Opaque>(move _20) -> bb4; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(&&i32) -> &core::fmt::Opaque {std::intrinsics::transmute::<&&i32, &core::fmt::Opaque>}, val: Value(Scalar(<ZST>)) } } bb4: { - (_24.0: &core::fmt::Opaque) = move _29; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_24.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _28; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_29); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_28); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageLive(_26); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - _27 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_16.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _18; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageDead(_18); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _22 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {<&i32 as std::fmt::Debug>::fmt}, val: Value(Scalar(<ZST>)) } - StorageLive(_30); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _30 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _27) -> bb5; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageLive(_21); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _21 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _22) -> bb5; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) -> for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {std::intrinsics::transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>}, val: Value(Scalar(<ZST>)) } } bb5: { - StorageLive(_31); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _31 = transmute::<&&i32, &core::fmt::Opaque>(move _23) -> bb6; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_17.0: &core::fmt::Opaque) = transmute::<&&i32, &core::fmt::Opaque>(move _23) -> bb6; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(&&i32) -> &core::fmt::Opaque {std::intrinsics::transmute::<&&i32, &core::fmt::Opaque>}, val: Value(Scalar(<ZST>)) } } bb6: { - (_26.0: &core::fmt::Opaque) = move _31; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_26.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _30; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_31); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_30); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _17 = [move _24, move _26]; // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_26); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_24); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - _16 = &_17; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - _15 = move _16 as &[std::fmt::ArgumentV1] (Pointer(Unsize)); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageLive(_32); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - discriminant(_32) = 0; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_13.0: &[&str]) = move _14; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_13.1: std::option::Option<&[std::fmt::rt::v1::Argument]>) = move _32; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_13.2: &[std::fmt::ArgumentV1]) = move _15; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_32); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _12 = &_13; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - begin_panic_fmt(move _12); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + (_17.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _21; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageDead(_21); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _11 = [move _16, move _17]; // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL + _10 = &_11; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + _25 = move _10 as &[std::fmt::ArgumentV1] (Pointer(Unsize)); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + StorageLive(_24); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + discriminant(_24) = 0; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_9.1: std::option::Option<&[std::fmt::rt::v1::Argument]>) = move _24; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_9.2: &[std::fmt::ArgumentV1]) = move _25; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageDead(_24); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _8 = &_9; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + begin_panic_fmt(move _8); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL // mir::Constant // + span: $SRC_DIR/std/src/macros.rs:LL:COL // + literal: Const { ty: for<'r, 's> fn(&'r std::fmt::Arguments<'s>) -> ! {std::rt::begin_panic_fmt}, val: Value(Scalar(<ZST>)) } diff --git a/src/test/mir-opt/issue_73223.main.PreCodegen.64bit.diff b/src/test/mir-opt/issue_73223.main.PreCodegen.64bit.diff index f86755cfa7f..a8662b96566 100644 --- a/src/test/mir-opt/issue_73223.main.PreCodegen.64bit.diff +++ b/src/test/mir-opt/issue_73223.main.PreCodegen.64bit.diff @@ -3,66 +3,59 @@ fn main() -> () { let mut _0: (); // return place in scope 0 at $DIR/issue-73223.rs:1:11: 1:11 - let mut _1: std::option::Option<i32>; // in scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - let _2: i32; // in scope 0 at $DIR/issue-73223.rs:3:14: 3:15 - let mut _4: i32; // in scope 0 at $DIR/issue-73223.rs:7:22: 7:27 - let mut _5: (&i32, &i32); // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _6: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _9: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _10: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _11: i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _12: &std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let _13: std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _14: &[&str]; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _15: &[std::fmt::ArgumentV1]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let _16: &[std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let _17: [std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _18: (&&i32, &&i32); // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _19: &&i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _20: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _21: &&i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _24: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _25: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let mut _26: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _27: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let _1: i32; // in scope 0 at $DIR/issue-73223.rs:2:9: 2:14 + let mut _2: std::option::Option<i32>; // in scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + let mut _4: (&i32, &i32); // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _5: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _6: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _7: i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _8: &std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let _9: std::fmt::Arguments; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _10: &[std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let _11: [std::fmt::ArgumentV1; 2]; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _12: (&&i32, &&i32); // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let _13: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _14: &&i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let _15: &i32; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + let mut _16: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _17: std::fmt::ArgumentV1; // in scope 0 at $SRC_DIR/std/src/macros.rs:LL:COL scope 1 { - debug split => _2; // in scope 1 at $DIR/issue-73223.rs:2:9: 2:14 + debug split => _1; // in scope 1 at $DIR/issue-73223.rs:2:9: 2:14 let _3: std::option::Option<i32>; // in scope 1 at $DIR/issue-73223.rs:7:9: 7:14 scope 3 { debug _prev => _3; // in scope 3 at $DIR/issue-73223.rs:7:9: 7:14 - let _7: &i32; // in scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _8: &i32; // in scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL scope 4 { - debug left_val => _7; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - debug right_val => _8; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _22: &&i32; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - let _23: &&i32; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + debug left_val => _13; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + debug right_val => _15; // in scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL scope 5 { - debug arg0 => _22; // in scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + debug arg0 => _20; // in scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL debug arg1 => _23; // in scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL scope 6 { - debug x => _22; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - debug f => _25; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - let mut _28: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _29: &core::fmt::Opaque; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL + debug x => _20; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + debug f => _19; // in scope 6 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + let mut _18: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _19: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _20: &&i32; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL } scope 8 { debug x => _23; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - debug f => _27; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - let mut _30: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL - let mut _31: &core::fmt::Opaque; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL + debug f => _22; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + let mut _21: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _22: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _23: &&i32; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL } } scope 10 { - debug pieces => _14; // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - debug args => _15; // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - let mut _32: std::option::Option<&[std::fmt::rt::v1::Argument]>; // in scope 10 at $SRC_DIR/std/src/macros.rs:LL:COL + debug pieces => (_9.0: &[&str]); // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + debug args => _25; // in scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + let mut _24: std::option::Option<&[std::fmt::rt::v1::Argument]>; // in scope 10 at $SRC_DIR/std/src/macros.rs:LL:COL + let mut _25: &[std::fmt::ArgumentV1]; // in scope 10 at $SRC_DIR/std/src/macros.rs:LL:COL } } } } scope 2 { - debug v => _2; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15 + debug v => _1; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15 } scope 7 { } @@ -70,138 +63,108 @@ } bb0: { - StorageLive(_1); // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - ((_1 as Some).0: i32) = const 1_i32; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - discriminant(_1) = 1; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 - _2 = ((_1 as Some).0: i32); // scope 0 at $DIR/issue-73223.rs:3:14: 3:15 - StorageDead(_1); // scope 0 at $DIR/issue-73223.rs:5:6: 5:7 - StorageLive(_3); // scope 1 at $DIR/issue-73223.rs:7:9: 7:14 - StorageLive(_4); // scope 1 at $DIR/issue-73223.rs:7:22: 7:27 - _4 = _2; // scope 1 at $DIR/issue-73223.rs:7:22: 7:27 - ((_3 as Some).0: i32) = move _4; // scope 1 at $DIR/issue-73223.rs:7:17: 7:28 + StorageLive(_2); // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + ((_2 as Some).0: i32) = const 1_i32; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + discriminant(_2) = 1; // scope 0 at $DIR/issue-73223.rs:2:23: 2:30 + _1 = ((_2 as Some).0: i32); // scope 0 at $DIR/issue-73223.rs:3:14: 3:15 + StorageDead(_2); // scope 0 at $DIR/issue-73223.rs:5:6: 5:7 + ((_3 as Some).0: i32) = _1; // scope 1 at $DIR/issue-73223.rs:7:22: 7:27 discriminant(_3) = 1; // scope 1 at $DIR/issue-73223.rs:7:17: 7:28 - StorageDead(_4); // scope 1 at $DIR/issue-73223.rs:7:27: 7:28 - StorageLive(_5); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_6); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _6 = &_2; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - (_5.0: &i32) = move _6; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - (_5.1: &i32) = const main::promoted[1]; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_4.0: &i32) = &_1; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_4.1: &i32) = const main::promoted[1]; // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // ty::Const // + ty: &i32 // + val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[1])) // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: &i32, val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[1])) } - StorageDead(_6); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_7); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _7 = (_5.0: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _8 = (_5.1: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_9); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_10); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_11); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _11 = (*_7); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _10 = Eq(move _11, const 1_i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_11); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _9 = Not(move _10); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_10); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - switchInt(_9) -> [false: bb1, otherwise: bb2]; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _13 = (_4.0: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _15 = (_4.1: &i32); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_5); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_6); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_7); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _7 = (*_13); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _6 = Eq(move _7, const 1_i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageDead(_7); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _5 = Not(move _6); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageDead(_6); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + switchInt(_5) -> [false: bb1, otherwise: bb2]; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL } bb1: { - StorageDead(_9); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_7); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageDead(_5); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageDead(_5); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL _0 = const (); // scope 0 at $DIR/issue-73223.rs:1:11: 9:2 - StorageDead(_3); // scope 1 at $DIR/issue-73223.rs:9:1: 9:2 return; // scope 0 at $DIR/issue-73223.rs:9:2: 9:2 } bb2: { - StorageLive(_13); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - _14 = const main::promoted[0] as &[&str] (Pointer(Unsize)); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_9.0: &[&str]) = const main::promoted[0] as &[&str] (Pointer(Unsize)); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // ty::Const // + ty: &[&str; 3] // + val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[0])) // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: &[&str; 3], val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ issue_73223[317d]::main[0]), const_param_did: None }, [], Some(promoted[0])) } - StorageLive(_17); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageLive(_18); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageLive(_19); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_20); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _20 = _7; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _19 = &_20; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_21); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _21 = &_8; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - (_18.0: &&i32) = move _19; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - (_18.1: &&i32) = move _21; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_21); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_19); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - _22 = (_18.0: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - _23 = (_18.1: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL - StorageLive(_24); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - _25 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_11); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + (_12.0: &&i32) = &_13; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + StorageLive(_14); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _14 = &_15; // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_12.1: &&i32) = move _14; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + StorageDead(_14); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + _20 = (_12.0: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _23 = (_12.1: &&i32); // scope 4 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + _19 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {<&i32 as std::fmt::Debug>::fmt}, val: Value(Scalar(<ZST>)) } - StorageLive(_28); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _28 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _25) -> bb3; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageLive(_18); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _18 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _19) -> bb3; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) -> for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {std::intrinsics::transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>}, val: Value(Scalar(<ZST>)) } } bb3: { - StorageLive(_29); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _29 = transmute::<&&i32, &core::fmt::Opaque>(move _22) -> bb4; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_16.0: &core::fmt::Opaque) = transmute::<&&i32, &core::fmt::Opaque>(move _20) -> bb4; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(&&i32) -> &core::fmt::Opaque {std::intrinsics::transmute::<&&i32, &core::fmt::Opaque>}, val: Value(Scalar(<ZST>)) } } bb4: { - (_24.0: &core::fmt::Opaque) = move _29; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_24.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _28; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_29); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_28); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageLive(_26); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - _27 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL + (_16.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _18; // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageDead(_18); // scope 7 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _22 = <&i32 as Debug>::fmt as for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> (Pointer(ReifyFnPointer)); // scope 5 at $SRC_DIR/core/src/macros/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/macros/mod.rs:LL:COL // + literal: Const { ty: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {<&i32 as std::fmt::Debug>::fmt}, val: Value(Scalar(<ZST>)) } - StorageLive(_30); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _30 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _27) -> bb5; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageLive(_21); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _21 = transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>(move _22) -> bb5; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) -> for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error> {std::intrinsics::transmute::<for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>, for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>>}, val: Value(Scalar(<ZST>)) } } bb5: { - StorageLive(_31); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _31 = transmute::<&&i32, &core::fmt::Opaque>(move _23) -> bb6; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_17.0: &core::fmt::Opaque) = transmute::<&&i32, &core::fmt::Opaque>(move _23) -> bb6; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL // mir::Constant // + span: $SRC_DIR/core/src/fmt/mod.rs:LL:COL // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(&&i32) -> &core::fmt::Opaque {std::intrinsics::transmute::<&&i32, &core::fmt::Opaque>}, val: Value(Scalar(<ZST>)) } } bb6: { - (_26.0: &core::fmt::Opaque) = move _31; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_26.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _30; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_31); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_30); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _17 = [move _24, move _26]; // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_26); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageDead(_24); // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL - _16 = &_17; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - _15 = move _16 as &[std::fmt::ArgumentV1] (Pointer(Unsize)); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - StorageLive(_32); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - discriminant(_32) = 0; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_13.0: &[&str]) = move _14; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_13.1: std::option::Option<&[std::fmt::rt::v1::Argument]>) = move _32; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - (_13.2: &[std::fmt::ArgumentV1]) = move _15; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - StorageDead(_32); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL - _12 = &_13; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL - begin_panic_fmt(move _12); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + (_17.1: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>) = move _21; // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageDead(_21); // scope 9 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _11 = [move _16, move _17]; // scope 5 at $SRC_DIR/std/src/macros.rs:LL:COL + _10 = &_11; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + _25 = move _10 as &[std::fmt::ArgumentV1] (Pointer(Unsize)); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + StorageLive(_24); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + discriminant(_24) = 0; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_9.1: std::option::Option<&[std::fmt::rt::v1::Argument]>) = move _24; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + (_9.2: &[std::fmt::ArgumentV1]) = move _25; // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + StorageDead(_24); // scope 10 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL + _8 = &_9; // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL + begin_panic_fmt(move _8); // scope 4 at $SRC_DIR/std/src/macros.rs:LL:COL // mir::Constant // + span: $SRC_DIR/std/src/macros.rs:LL:COL // + literal: Const { ty: for<'r, 's> fn(&'r std::fmt::Arguments<'s>) -> ! {std::rt::begin_panic_fmt}, val: Value(Scalar(<ZST>)) } diff --git a/src/test/mir-opt/nrvo-simple.rs b/src/test/mir-opt/nrvo-simple.rs index f0eb711b3f0..ab46d7b94c7 100644 --- a/src/test/mir-opt/nrvo-simple.rs +++ b/src/test/mir-opt/nrvo-simple.rs @@ -1,3 +1,5 @@ +// compile-flags: -Zmir-opt-level=1 + // EMIT_MIR nrvo_simple.nrvo.RenameReturnPlace.diff fn nrvo(init: fn(&mut [u8; 1024])) -> [u8; 1024] { let mut buf = [0; 1024]; diff --git a/src/test/mir-opt/nrvo_simple.nrvo.RenameReturnPlace.diff b/src/test/mir-opt/nrvo_simple.nrvo.RenameReturnPlace.diff index 924e87ea8c0..f438eaa0027 100644 --- a/src/test/mir-opt/nrvo_simple.nrvo.RenameReturnPlace.diff +++ b/src/test/mir-opt/nrvo_simple.nrvo.RenameReturnPlace.diff @@ -2,39 +2,42 @@ + // MIR for `nrvo` after RenameReturnPlace fn nrvo(_1: for<'r> fn(&'r mut [u8; 1024])) -> [u8; 1024] { - debug init => _1; // in scope 0 at $DIR/nrvo-simple.rs:2:9: 2:13 -- let mut _0: [u8; 1024]; // return place in scope 0 at $DIR/nrvo-simple.rs:2:39: 2:49 -+ let mut _0: [u8; 1024]; // return place in scope 0 at $DIR/nrvo-simple.rs:3:9: 3:16 - let mut _2: [u8; 1024]; // in scope 0 at $DIR/nrvo-simple.rs:3:9: 3:16 - let _3: (); // in scope 0 at $DIR/nrvo-simple.rs:4:5: 4:19 - let mut _4: for<'r> fn(&'r mut [u8; 1024]); // in scope 0 at $DIR/nrvo-simple.rs:4:5: 4:9 - let mut _5: &mut [u8; 1024]; // in scope 0 at $DIR/nrvo-simple.rs:4:10: 4:18 - let mut _6: &mut [u8; 1024]; // in scope 0 at $DIR/nrvo-simple.rs:4:10: 4:18 + debug init => _1; // in scope 0 at $DIR/nrvo-simple.rs:4:9: 4:13 +- let mut _0: [u8; 1024]; // return place in scope 0 at $DIR/nrvo-simple.rs:4:39: 4:49 ++ let mut _0: [u8; 1024]; // return place in scope 0 at $DIR/nrvo-simple.rs:5:9: 5:16 + let mut _2: [u8; 1024]; // in scope 0 at $DIR/nrvo-simple.rs:5:9: 5:16 + let _3: (); // in scope 0 at $DIR/nrvo-simple.rs:6:5: 6:19 + let mut _4: for<'r> fn(&'r mut [u8; 1024]); // in scope 0 at $DIR/nrvo-simple.rs:6:5: 6:9 + let mut _5: &mut [u8; 1024]; // in scope 0 at $DIR/nrvo-simple.rs:6:10: 6:18 + let mut _6: &mut [u8; 1024]; // in scope 0 at $DIR/nrvo-simple.rs:6:10: 6:18 scope 1 { -- debug buf => _2; // in scope 1 at $DIR/nrvo-simple.rs:3:9: 3:16 -+ debug buf => _0; // in scope 1 at $DIR/nrvo-simple.rs:3:9: 3:16 +- debug buf => _2; // in scope 1 at $DIR/nrvo-simple.rs:5:9: 5:16 ++ debug buf => _0; // in scope 1 at $DIR/nrvo-simple.rs:5:9: 5:16 } bb0: { -- StorageLive(_2); // scope 0 at $DIR/nrvo-simple.rs:3:9: 3:16 -- _2 = [const 0_u8; 1024]; // scope 0 at $DIR/nrvo-simple.rs:3:19: 3:28 -+ _0 = [const 0_u8; 1024]; // scope 0 at $DIR/nrvo-simple.rs:3:19: 3:28 - StorageLive(_3); // scope 1 at $DIR/nrvo-simple.rs:4:5: 4:19 - StorageLive(_5); // scope 1 at $DIR/nrvo-simple.rs:4:10: 4:18 - StorageLive(_6); // scope 1 at $DIR/nrvo-simple.rs:4:10: 4:18 -- _6 = &mut _2; // scope 1 at $DIR/nrvo-simple.rs:4:10: 4:18 -+ _6 = &mut _0; // scope 1 at $DIR/nrvo-simple.rs:4:10: 4:18 - _5 = &mut (*_6); // scope 1 at $DIR/nrvo-simple.rs:4:10: 4:18 - _3 = move _1(move _5) -> bb1; // scope 1 at $DIR/nrvo-simple.rs:4:5: 4:19 +- StorageLive(_2); // scope 0 at $DIR/nrvo-simple.rs:5:9: 5:16 +- _2 = [const 0_u8; 1024]; // scope 0 at $DIR/nrvo-simple.rs:5:19: 5:28 ++ _0 = [const 0_u8; 1024]; // scope 0 at $DIR/nrvo-simple.rs:5:19: 5:28 + StorageLive(_3); // scope 1 at $DIR/nrvo-simple.rs:6:5: 6:19 + StorageLive(_4); // scope 1 at $DIR/nrvo-simple.rs:6:5: 6:9 + _4 = _1; // scope 1 at $DIR/nrvo-simple.rs:6:5: 6:9 + StorageLive(_5); // scope 1 at $DIR/nrvo-simple.rs:6:10: 6:18 + StorageLive(_6); // scope 1 at $DIR/nrvo-simple.rs:6:10: 6:18 +- _6 = &mut _2; // scope 1 at $DIR/nrvo-simple.rs:6:10: 6:18 ++ _6 = &mut _0; // scope 1 at $DIR/nrvo-simple.rs:6:10: 6:18 + _5 = &mut (*_6); // scope 1 at $DIR/nrvo-simple.rs:6:10: 6:18 + _3 = move _4(move _5) -> bb1; // scope 1 at $DIR/nrvo-simple.rs:6:5: 6:19 } bb1: { - StorageDead(_5); // scope 1 at $DIR/nrvo-simple.rs:4:18: 4:19 - StorageDead(_6); // scope 1 at $DIR/nrvo-simple.rs:4:19: 4:20 - StorageDead(_3); // scope 1 at $DIR/nrvo-simple.rs:4:19: 4:20 -- _0 = _2; // scope 1 at $DIR/nrvo-simple.rs:5:5: 5:8 -- StorageDead(_2); // scope 0 at $DIR/nrvo-simple.rs:6:1: 6:2 - return; // scope 0 at $DIR/nrvo-simple.rs:6:2: 6:2 + StorageDead(_5); // scope 1 at $DIR/nrvo-simple.rs:6:18: 6:19 + StorageDead(_4); // scope 1 at $DIR/nrvo-simple.rs:6:18: 6:19 + StorageDead(_6); // scope 1 at $DIR/nrvo-simple.rs:6:19: 6:20 + StorageDead(_3); // scope 1 at $DIR/nrvo-simple.rs:6:19: 6:20 +- _0 = _2; // scope 1 at $DIR/nrvo-simple.rs:7:5: 7:8 +- StorageDead(_2); // scope 0 at $DIR/nrvo-simple.rs:8:1: 8:2 + return; // scope 0 at $DIR/nrvo-simple.rs:8:2: 8:2 } } diff --git a/src/test/mir-opt/rustc.try_identity.DestinationPropagation.diff b/src/test/mir-opt/rustc.try_identity.DestinationPropagation.diff new file mode 100644 index 00000000000..c3e503bf2c6 --- /dev/null +++ b/src/test/mir-opt/rustc.try_identity.DestinationPropagation.diff @@ -0,0 +1,72 @@ +- // MIR for `try_identity` before DestinationPropagation ++ // MIR for `try_identity` after DestinationPropagation + + fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i32> { + debug x => _1; // in scope 0 at $DIR/simplify_try.rs:6:17: 6:18 + let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:6:41: 6:57 + let _2: u32; // in scope 0 at $DIR/simplify_try.rs:7:9: 7:10 + let mut _3: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _4: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + let mut _5: isize; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _6: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _7: !; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _8: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _9: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _10: u32; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _11: u32; // in scope 0 at $DIR/simplify_try.rs:8:8: 8:9 + scope 1 { + debug y => _2; // in scope 1 at $DIR/simplify_try.rs:7:9: 7:10 + } + scope 2 { + debug err => _6; // in scope 2 at $DIR/simplify_try.rs:7:14: 7:15 + scope 3 { + scope 7 { + debug t => _9; // in scope 7 at $SRC_DIR/libcore/convert/mod.rs:LL:COL + } + scope 8 { + debug v => _8; // in scope 8 at $SRC_DIR/libcore/result.rs:LL:COL + let mut _12: i32; // in scope 8 at $DIR/simplify_try.rs:7:14: 7:15 + } + } + } + scope 4 { + debug val => _10; // in scope 4 at $DIR/simplify_try.rs:7:13: 7:15 + scope 5 { + } + } + scope 6 { +- debug self => _4; // in scope 6 at $SRC_DIR/libcore/result.rs:LL:COL ++ debug self => _0; // in scope 6 at $SRC_DIR/libcore/result.rs:LL:COL + } + + bb0: { + StorageLive(_2); // scope 0 at $DIR/simplify_try.rs:7:9: 7:10 +- StorageLive(_3); // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 +- StorageLive(_4); // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 +- _4 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 +- _3 = move _4; // scope 6 at $SRC_DIR/libcore/result.rs:LL:COL +- StorageDead(_4); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 +- _5 = discriminant(_3); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 ++ nop; // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 ++ nop; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 ++ _0 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 ++ nop; // scope 6 at $SRC_DIR/libcore/result.rs:LL:COL ++ nop; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 ++ _5 = discriminant(_0); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + goto -> bb1; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + } + + bb1: { +- _0 = move _3; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 +- StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 ++ nop; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 ++ nop; // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 + StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:9:1: 9:2 + goto -> bb2; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 + } + + bb2: { + return; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 + } + } + diff --git a/src/test/mir-opt/simplify_try.rs b/src/test/mir-opt/simplify_try.rs index fa127de13df..fca80bee896 100644 --- a/src/test/mir-opt/simplify_try.rs +++ b/src/test/mir-opt/simplify_try.rs @@ -1,6 +1,7 @@ // EMIT_MIR simplify_try.try_identity.SimplifyArmIdentity.diff // EMIT_MIR simplify_try.try_identity.SimplifyBranchSame.after.mir // EMIT_MIR simplify_try.try_identity.SimplifyLocals.after.mir +// EMIT_MIR simplify_try.try_identity.DestinationPropagation.diff fn try_identity(x: Result<u32, i32>) -> Result<u32, i32> { let y = x?; diff --git a/src/test/mir-opt/simplify_try.try_identity.DestinationPropagation.diff b/src/test/mir-opt/simplify_try.try_identity.DestinationPropagation.diff new file mode 100644 index 00000000000..187a3cfbb89 --- /dev/null +++ b/src/test/mir-opt/simplify_try.try_identity.DestinationPropagation.diff @@ -0,0 +1,72 @@ +- // MIR for `try_identity` before DestinationPropagation ++ // MIR for `try_identity` after DestinationPropagation + + fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i32> { + debug x => _1; // in scope 0 at $DIR/simplify_try.rs:6:17: 6:18 + let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:6:41: 6:57 + let _2: u32; // in scope 0 at $DIR/simplify_try.rs:7:9: 7:10 + let mut _3: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _4: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + let mut _5: isize; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _6: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _7: !; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _8: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _9: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _10: u32; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _11: u32; // in scope 0 at $DIR/simplify_try.rs:8:8: 8:9 + scope 1 { + debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:7:9: 7:10 + } + scope 2 { + debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:7:14: 7:15 + scope 3 { + scope 7 { + debug t => ((_0 as Err).0: i32); // in scope 7 at $SRC_DIR/core/src/convert/mod.rs:LL:COL + } + scope 8 { + debug v => ((_0 as Err).0: i32); // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL + let mut _12: i32; // in scope 8 at $DIR/simplify_try.rs:7:14: 7:15 + } + } + } + scope 4 { + debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:7:13: 7:15 + scope 5 { + } + } + scope 6 { +- debug self => _4; // in scope 6 at $SRC_DIR/core/src/result.rs:LL:COL ++ debug self => _0; // in scope 6 at $SRC_DIR/core/src/result.rs:LL:COL + } + + bb0: { + StorageLive(_2); // scope 0 at $DIR/simplify_try.rs:7:9: 7:10 +- StorageLive(_3); // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 +- StorageLive(_4); // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 +- _4 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 +- _3 = move _4; // scope 6 at $SRC_DIR/core/src/result.rs:LL:COL +- StorageDead(_4); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 +- _5 = discriminant(_3); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 ++ nop; // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 ++ nop; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 ++ _0 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 ++ nop; // scope 6 at $SRC_DIR/core/src/result.rs:LL:COL ++ nop; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 ++ _5 = discriminant(_0); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + goto -> bb1; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + } + + bb1: { +- _0 = move _3; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 +- StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 ++ nop; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 ++ nop; // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 + StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:9:1: 9:2 + goto -> bb2; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 + } + + bb2: { + return; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 + } + } + diff --git a/src/test/mir-opt/simplify_try.try_identity.SimplifyArmIdentity.diff b/src/test/mir-opt/simplify_try.try_identity.SimplifyArmIdentity.diff index 26ce290b549..0c687684c50 100644 --- a/src/test/mir-opt/simplify_try.try_identity.SimplifyArmIdentity.diff +++ b/src/test/mir-opt/simplify_try.try_identity.SimplifyArmIdentity.diff @@ -2,25 +2,25 @@ + // MIR for `try_identity` after SimplifyArmIdentity fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i32> { - debug x => _1; // in scope 0 at $DIR/simplify_try.rs:5:17: 5:18 - let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:5:41: 5:57 - let _2: u32; // in scope 0 at $DIR/simplify_try.rs:6:9: 6:10 - let mut _3: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:6:13: 6:15 - let mut _4: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:6:13: 6:14 - let mut _5: isize; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let _6: i32; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let mut _7: !; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let mut _8: i32; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let mut _9: i32; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let _10: u32; // in scope 0 at $DIR/simplify_try.rs:6:13: 6:15 - let mut _11: u32; // in scope 0 at $DIR/simplify_try.rs:7:8: 7:9 + debug x => _1; // in scope 0 at $DIR/simplify_try.rs:6:17: 6:18 + let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:6:41: 6:57 + let _2: u32; // in scope 0 at $DIR/simplify_try.rs:7:9: 7:10 + let mut _3: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _4: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + let mut _5: isize; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _6: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _7: !; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _8: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _9: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _10: u32; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _11: u32; // in scope 0 at $DIR/simplify_try.rs:8:8: 8:9 scope 1 { -- debug y => _2; // in scope 1 at $DIR/simplify_try.rs:6:9: 6:10 -+ debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:6:9: 6:10 +- debug y => _2; // in scope 1 at $DIR/simplify_try.rs:7:9: 7:10 ++ debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:7:9: 7:10 } scope 2 { -- debug err => _6; // in scope 2 at $DIR/simplify_try.rs:6:14: 6:15 -+ debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:6:14: 6:15 +- debug err => _6; // in scope 2 at $DIR/simplify_try.rs:7:14: 7:15 ++ debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:7:14: 7:15 scope 3 { scope 7 { - debug t => _9; // in scope 7 at $SRC_DIR/core/src/convert/mod.rs:LL:COL @@ -29,13 +29,13 @@ scope 8 { - debug v => _8; // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL + debug v => ((_0 as Err).0: i32); // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - let mut _12: i32; // in scope 8 at $DIR/simplify_try.rs:6:14: 6:15 + let mut _12: i32; // in scope 8 at $DIR/simplify_try.rs:7:14: 7:15 } } } scope 4 { -- debug val => _10; // in scope 4 at $DIR/simplify_try.rs:6:13: 6:15 -+ debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:6:13: 6:15 +- debug val => _10; // in scope 4 at $DIR/simplify_try.rs:7:13: 7:15 ++ debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:7:13: 7:15 scope 5 { } } @@ -44,55 +44,55 @@ } bb0: { - StorageLive(_2); // scope 0 at $DIR/simplify_try.rs:6:9: 6:10 - StorageLive(_3); // scope 0 at $DIR/simplify_try.rs:6:13: 6:15 - StorageLive(_4); // scope 0 at $DIR/simplify_try.rs:6:13: 6:14 - _4 = _1; // scope 0 at $DIR/simplify_try.rs:6:13: 6:14 + StorageLive(_2); // scope 0 at $DIR/simplify_try.rs:7:9: 7:10 + StorageLive(_3); // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + StorageLive(_4); // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + _4 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 _3 = move _4; // scope 6 at $SRC_DIR/core/src/result.rs:LL:COL - StorageDead(_4); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - _5 = discriminant(_3); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - switchInt(move _5) -> [0_isize: bb1, otherwise: bb2]; // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 + StorageDead(_4); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + _5 = discriminant(_3); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + switchInt(move _5) -> [0_isize: bb1, otherwise: bb2]; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 } bb1: { -- StorageLive(_10); // scope 0 at $DIR/simplify_try.rs:6:13: 6:15 -- _10 = ((_3 as Ok).0: u32); // scope 0 at $DIR/simplify_try.rs:6:13: 6:15 -- _2 = _10; // scope 5 at $DIR/simplify_try.rs:6:13: 6:15 -- StorageDead(_10); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 -+ _0 = move _3; // scope 1 at $DIR/simplify_try.rs:7:5: 7:10 - StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:6:15: 6:16 -- StorageLive(_11); // scope 1 at $DIR/simplify_try.rs:7:8: 7:9 -- _11 = _2; // scope 1 at $DIR/simplify_try.rs:7:8: 7:9 -- ((_0 as Ok).0: u32) = move _11; // scope 1 at $DIR/simplify_try.rs:7:5: 7:10 -- discriminant(_0) = 0; // scope 1 at $DIR/simplify_try.rs:7:5: 7:10 -- StorageDead(_11); // scope 1 at $DIR/simplify_try.rs:7:9: 7:10 - StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:8:1: 8:2 - goto -> bb3; // scope 0 at $DIR/simplify_try.rs:8:2: 8:2 +- StorageLive(_10); // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 +- _10 = ((_3 as Ok).0: u32); // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 +- _2 = _10; // scope 5 at $DIR/simplify_try.rs:7:13: 7:15 +- StorageDead(_10); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 ++ _0 = move _3; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 + StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 +- StorageLive(_11); // scope 1 at $DIR/simplify_try.rs:8:8: 8:9 +- _11 = _2; // scope 1 at $DIR/simplify_try.rs:8:8: 8:9 +- ((_0 as Ok).0: u32) = move _11; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 +- discriminant(_0) = 0; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 +- StorageDead(_11); // scope 1 at $DIR/simplify_try.rs:8:9: 8:10 + StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:9:1: 9:2 + goto -> bb3; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 } bb2: { -- StorageLive(_6); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 -- _6 = ((_3 as Err).0: i32); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 -- StorageLive(_8); // scope 3 at $DIR/simplify_try.rs:6:14: 6:15 -- StorageLive(_9); // scope 3 at $DIR/simplify_try.rs:6:14: 6:15 -- _9 = _6; // scope 3 at $DIR/simplify_try.rs:6:14: 6:15 +- StorageLive(_6); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 +- _6 = ((_3 as Err).0: i32); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 +- StorageLive(_8); // scope 3 at $DIR/simplify_try.rs:7:14: 7:15 +- StorageLive(_9); // scope 3 at $DIR/simplify_try.rs:7:14: 7:15 +- _9 = _6; // scope 3 at $DIR/simplify_try.rs:7:14: 7:15 - _8 = move _9; // scope 7 at $SRC_DIR/core/src/convert/mod.rs:LL:COL -- StorageDead(_9); // scope 3 at $DIR/simplify_try.rs:6:14: 6:15 +- StorageDead(_9); // scope 3 at $DIR/simplify_try.rs:7:14: 7:15 - StorageLive(_12); // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - _12 = move _8; // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - ((_0 as Err).0: i32) = move _12; // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - discriminant(_0) = 1; // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - StorageDead(_12); // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL -- StorageDead(_8); // scope 3 at $DIR/simplify_try.rs:6:14: 6:15 -- StorageDead(_6); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 +- StorageDead(_8); // scope 3 at $DIR/simplify_try.rs:7:14: 7:15 +- StorageDead(_6); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + _0 = move _3; // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:6:15: 6:16 - StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:8:1: 8:2 - goto -> bb3; // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 + StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 + StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:9:1: 9:2 + goto -> bb3; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 } bb3: { - return; // scope 0 at $DIR/simplify_try.rs:8:2: 8:2 + return; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 } } diff --git a/src/test/mir-opt/simplify_try.try_identity.SimplifyBranchSame.after.mir b/src/test/mir-opt/simplify_try.try_identity.SimplifyBranchSame.after.mir index dc4aae176f2..9428d305c87 100644 --- a/src/test/mir-opt/simplify_try.try_identity.SimplifyBranchSame.after.mir +++ b/src/test/mir-opt/simplify_try.try_identity.SimplifyBranchSame.after.mir @@ -1,35 +1,35 @@ // MIR for `try_identity` after SimplifyBranchSame fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i32> { - debug x => _1; // in scope 0 at $DIR/simplify_try.rs:5:17: 5:18 - let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:5:41: 5:57 - let _2: u32; // in scope 0 at $DIR/simplify_try.rs:6:9: 6:10 - let mut _3: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:6:13: 6:15 - let mut _4: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:6:13: 6:14 - let mut _5: isize; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let _6: i32; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let mut _7: !; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let mut _8: i32; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let mut _9: i32; // in scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - let _10: u32; // in scope 0 at $DIR/simplify_try.rs:6:13: 6:15 - let mut _11: u32; // in scope 0 at $DIR/simplify_try.rs:7:8: 7:9 + debug x => _1; // in scope 0 at $DIR/simplify_try.rs:6:17: 6:18 + let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:6:41: 6:57 + let _2: u32; // in scope 0 at $DIR/simplify_try.rs:7:9: 7:10 + let mut _3: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _4: std::result::Result<u32, i32>; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + let mut _5: isize; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _6: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _7: !; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _8: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let mut _9: i32; // in scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + let _10: u32; // in scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + let mut _11: u32; // in scope 0 at $DIR/simplify_try.rs:8:8: 8:9 scope 1 { - debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:6:9: 6:10 + debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:7:9: 7:10 } scope 2 { - debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:6:14: 6:15 + debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:7:14: 7:15 scope 3 { scope 7 { debug t => ((_0 as Err).0: i32); // in scope 7 at $SRC_DIR/core/src/convert/mod.rs:LL:COL } scope 8 { debug v => ((_0 as Err).0: i32); // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL - let mut _12: i32; // in scope 8 at $DIR/simplify_try.rs:6:14: 6:15 + let mut _12: i32; // in scope 8 at $DIR/simplify_try.rs:7:14: 7:15 } } } scope 4 { - debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:6:13: 6:15 + debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:7:13: 7:15 scope 5 { } } @@ -38,24 +38,24 @@ fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i } bb0: { - StorageLive(_2); // scope 0 at $DIR/simplify_try.rs:6:9: 6:10 - StorageLive(_3); // scope 0 at $DIR/simplify_try.rs:6:13: 6:15 - StorageLive(_4); // scope 0 at $DIR/simplify_try.rs:6:13: 6:14 - _4 = _1; // scope 0 at $DIR/simplify_try.rs:6:13: 6:14 + StorageLive(_2); // scope 0 at $DIR/simplify_try.rs:7:9: 7:10 + StorageLive(_3); // scope 0 at $DIR/simplify_try.rs:7:13: 7:15 + StorageLive(_4); // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + _4 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 _3 = move _4; // scope 6 at $SRC_DIR/core/src/result.rs:LL:COL - StorageDead(_4); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - _5 = discriminant(_3); // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 - goto -> bb1; // scope 0 at $DIR/simplify_try.rs:6:14: 6:15 + StorageDead(_4); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + _5 = discriminant(_3); // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 + goto -> bb1; // scope 0 at $DIR/simplify_try.rs:7:14: 7:15 } bb1: { - _0 = move _3; // scope 1 at $DIR/simplify_try.rs:7:5: 7:10 - StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:6:15: 6:16 - StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:8:1: 8:2 - goto -> bb2; // scope 0 at $DIR/simplify_try.rs:8:2: 8:2 + _0 = move _3; // scope 1 at $DIR/simplify_try.rs:8:5: 8:10 + StorageDead(_3); // scope 0 at $DIR/simplify_try.rs:7:15: 7:16 + StorageDead(_2); // scope 0 at $DIR/simplify_try.rs:9:1: 9:2 + goto -> bb2; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 } bb2: { - return; // scope 0 at $DIR/simplify_try.rs:8:2: 8:2 + return; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 } } diff --git a/src/test/mir-opt/simplify_try.try_identity.SimplifyLocals.after.mir b/src/test/mir-opt/simplify_try.try_identity.SimplifyLocals.after.mir index d65a2b12c0f..a25472f6a5e 100644 --- a/src/test/mir-opt/simplify_try.try_identity.SimplifyLocals.after.mir +++ b/src/test/mir-opt/simplify_try.try_identity.SimplifyLocals.after.mir @@ -1,13 +1,13 @@ // MIR for `try_identity` after SimplifyLocals fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i32> { - debug x => _1; // in scope 0 at $DIR/simplify_try.rs:5:17: 5:18 - let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:5:41: 5:57 + debug x => _1; // in scope 0 at $DIR/simplify_try.rs:6:17: 6:18 + let mut _0: std::result::Result<u32, i32>; // return place in scope 0 at $DIR/simplify_try.rs:6:41: 6:57 scope 1 { - debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:6:9: 6:10 + debug y => ((_0 as Ok).0: u32); // in scope 1 at $DIR/simplify_try.rs:7:9: 7:10 } scope 2 { - debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:6:14: 6:15 + debug err => ((_0 as Err).0: i32); // in scope 2 at $DIR/simplify_try.rs:7:14: 7:15 scope 3 { scope 7 { debug t => ((_0 as Err).0: i32); // in scope 7 at $SRC_DIR/core/src/convert/mod.rs:LL:COL @@ -18,16 +18,16 @@ fn try_identity(_1: std::result::Result<u32, i32>) -> std::result::Result<u32, i } } scope 4 { - debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:6:13: 6:15 + debug val => ((_0 as Ok).0: u32); // in scope 4 at $DIR/simplify_try.rs:7:13: 7:15 scope 5 { } } scope 6 { - debug self => _1; // in scope 6 at $SRC_DIR/core/src/result.rs:LL:COL + debug self => _0; // in scope 6 at $SRC_DIR/core/src/result.rs:LL:COL } bb0: { - _0 = move _1; // scope 1 at $DIR/simplify_try.rs:7:5: 7:10 - return; // scope 0 at $DIR/simplify_try.rs:8:2: 8:2 + _0 = _1; // scope 0 at $DIR/simplify_try.rs:7:13: 7:14 + return; // scope 0 at $DIR/simplify_try.rs:9:2: 9:2 } } diff --git a/src/test/ui/dest-prop/skeptic-miscompile.rs b/src/test/ui/dest-prop/skeptic-miscompile.rs new file mode 100644 index 00000000000..c27a1f04532 --- /dev/null +++ b/src/test/ui/dest-prop/skeptic-miscompile.rs @@ -0,0 +1,24 @@ +// run-pass + +// compile-flags: -Zmir-opt-level=2 + +trait IterExt: Iterator { + fn fold_ex<B, F>(mut self, init: B, mut f: F) -> B + where + Self: Sized, + F: FnMut(B, Self::Item) -> B, + { + let mut accum = init; + while let Some(x) = self.next() { + accum = f(accum, x); + } + accum + } +} + +impl<T: Iterator> IterExt for T {} + +fn main() { + let test = &["\n"]; + test.iter().fold_ex(String::new(), |_, b| b.to_string()); +} |