diff options
8 files changed, 106 insertions, 115 deletions
diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 014cf88389e..b7fbda58eca 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -911,13 +911,13 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> { }); }, { - sess.time("liveness_and_intrinsic_checking", || { - tcx.hir().par_for_each_module(|module| { + sess.time("liveness_checking", || { + tcx.hir().par_body_owners(|def_id| { // this must run before MIR dump, because // "not all control paths return a value" is reported here. // // maybe move the check to a MIR pass? - tcx.ensure().check_mod_liveness(module); + tcx.ensure().check_liveness(def_id.to_def_id()); }); }); } diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index f78f62e31d2..16de6ebfe58 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -818,8 +818,8 @@ rustc_queries! { desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) } } - query check_mod_liveness(key: LocalDefId) -> () { - desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) } + query check_liveness(key: DefId) { + desc { |tcx| "checking liveness of variables in {}", tcx.def_path_str(key) } } /// Return the live symbols in the crate for dead code check. diff --git a/compiler/rustc_passes/src/liveness.rs b/compiler/rustc_passes/src/liveness.rs index 7124b84bfef..1f22ebc730a 100644 --- a/compiler/rustc_passes/src/liveness.rs +++ b/compiler/rustc_passes/src/liveness.rs @@ -89,11 +89,10 @@ use rustc_data_structures::fx::FxIndexMap; use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::def::*; -use rustc_hir::def_id::LocalDefId; +use rustc_hir::def_id::{DefId, LocalDefId}; use rustc_hir::intravisit::{self, Visitor}; use rustc_hir::{Expr, HirId, HirIdMap, HirIdSet}; use rustc_index::vec::IndexVec; -use rustc_middle::hir::nested_filter; use rustc_middle::ty::query::Providers; use rustc_middle::ty::{self, DefIdTree, RootVariableMinCaptureList, Ty, TyCtxt}; use rustc_session::lint; @@ -139,12 +138,54 @@ fn live_node_kind_to_string(lnk: LiveNodeKind, tcx: TyCtxt<'_>) -> String { } } -fn check_mod_liveness(tcx: TyCtxt<'_>, module_def_id: LocalDefId) { - tcx.hir().visit_item_likes_in_module(module_def_id, &mut IrMaps::new(tcx)); +fn check_liveness(tcx: TyCtxt<'_>, def_id: DefId) { + let local_def_id = match def_id.as_local() { + None => return, + Some(def_id) => def_id, + }; + + // Don't run unused pass for #[derive()] + let parent = tcx.local_parent(local_def_id); + if let DefKind::Impl = tcx.def_kind(parent) + && tcx.has_attr(parent.to_def_id(), sym::automatically_derived) + { + return; + } + + // Don't run unused pass for #[naked] + if tcx.has_attr(def_id, sym::naked) { + return; + } + + let mut maps = IrMaps::new(tcx); + let body_id = tcx.hir().body_owned_by(local_def_id); + let hir_id = tcx.hir().body_owner(body_id); + let body = tcx.hir().body(body_id); + + if let Some(upvars) = tcx.upvars_mentioned(def_id) { + for &var_hir_id in upvars.keys() { + let var_name = tcx.hir().name(var_hir_id); + maps.add_variable(Upvar(var_hir_id, var_name)); + } + } + + // gather up the various local variables, significant expressions, + // and so forth: + maps.visit_body(body); + + // compute liveness + let mut lsets = Liveness::new(&mut maps, local_def_id); + let entry_ln = lsets.compute(&body, hir_id); + lsets.log_liveness(entry_ln, body_id.hir_id); + + // check for various error conditions + lsets.visit_body(body); + lsets.warn_about_unused_upvars(entry_ln); + lsets.warn_about_unused_args(body, entry_ln); } pub fn provide(providers: &mut Providers) { - *providers = Providers { check_mod_liveness, ..*providers }; + *providers = Providers { check_liveness, ..*providers }; } // ______________________________________________________________________ @@ -316,56 +357,6 @@ impl<'tcx> IrMaps<'tcx> { } impl<'tcx> Visitor<'tcx> for IrMaps<'tcx> { - type NestedFilter = nested_filter::OnlyBodies; - - fn nested_visit_map(&mut self) -> Self::Map { - self.tcx.hir() - } - - fn visit_body(&mut self, body: &'tcx hir::Body<'tcx>) { - debug!("visit_body {:?}", body.id()); - - // swap in a new set of IR maps for this body - let mut maps = IrMaps::new(self.tcx); - let hir_id = maps.tcx.hir().body_owner(body.id()); - let local_def_id = maps.tcx.hir().local_def_id(hir_id); - let def_id = local_def_id.to_def_id(); - - // Don't run unused pass for #[derive()] - let parent = self.tcx.local_parent(local_def_id); - if let DefKind::Impl = self.tcx.def_kind(parent) - && self.tcx.has_attr(parent.to_def_id(), sym::automatically_derived) - { - return; - } - - // Don't run unused pass for #[naked] - if self.tcx.has_attr(def_id, sym::naked) { - return; - } - - if let Some(upvars) = maps.tcx.upvars_mentioned(def_id) { - for &var_hir_id in upvars.keys() { - let var_name = maps.tcx.hir().name(var_hir_id); - maps.add_variable(Upvar(var_hir_id, var_name)); - } - } - - // gather up the various local variables, significant expressions, - // and so forth: - intravisit::walk_body(&mut maps, body); - - // compute liveness - let mut lsets = Liveness::new(&mut maps, local_def_id); - let entry_ln = lsets.compute(&body, hir_id); - lsets.log_liveness(entry_ln, body.id().hir_id); - - // check for various error conditions - lsets.visit_body(body); - lsets.warn_about_unused_upvars(entry_ln); - lsets.warn_about_unused_args(body, entry_ln); - } - fn visit_local(&mut self, local: &'tcx hir::Local<'tcx>) { self.add_from_pat(&local.pat); if local.els.is_some() { diff --git a/src/test/ui/closures/2229_closure_analysis/run_pass/destructure-pattern-closure-within-closure.stderr b/src/test/ui/closures/2229_closure_analysis/run_pass/destructure-pattern-closure-within-closure.stderr index 40274c88318..cf8bd7a0a27 100644 --- a/src/test/ui/closures/2229_closure_analysis/run_pass/destructure-pattern-closure-within-closure.stderr +++ b/src/test/ui/closures/2229_closure_analysis/run_pass/destructure-pattern-closure-within-closure.stderr @@ -1,8 +1,8 @@ -warning: unused variable: `t2` - --> $DIR/destructure-pattern-closure-within-closure.rs:13:21 +warning: unused variable: `g2` + --> $DIR/destructure-pattern-closure-within-closure.rs:10:17 | -LL | let (_, t2) = t; - | ^^ help: if this is intentional, prefix it with an underscore: `_t2` +LL | let (_, g2) = g; + | ^^ help: if this is intentional, prefix it with an underscore: `_g2` | note: the lint level is defined here --> $DIR/destructure-pattern-closure-within-closure.rs:3:9 @@ -11,11 +11,11 @@ LL | #![warn(unused)] | ^^^^^^ = note: `#[warn(unused_variables)]` implied by `#[warn(unused)]` -warning: unused variable: `g2` - --> $DIR/destructure-pattern-closure-within-closure.rs:10:17 +warning: unused variable: `t2` + --> $DIR/destructure-pattern-closure-within-closure.rs:13:21 | -LL | let (_, g2) = g; - | ^^ help: if this is intentional, prefix it with an underscore: `_g2` +LL | let (_, t2) = t; + | ^^ help: if this is intentional, prefix it with an underscore: `_t2` warning: 2 warnings emitted diff --git a/src/test/ui/lint/unused/issue-54180-unused-ref-field.stderr b/src/test/ui/lint/unused/issue-54180-unused-ref-field.stderr index c501aa25f13..f2e6168998c 100644 --- a/src/test/ui/lint/unused/issue-54180-unused-ref-field.stderr +++ b/src/test/ui/lint/unused/issue-54180-unused-ref-field.stderr @@ -11,12 +11,6 @@ LL | #![deny(unused)] | ^^^^^^ = note: `#[deny(unused_variables)]` implied by `#[deny(unused)]` -error: unused variable: `x` - --> $DIR/issue-54180-unused-ref-field.rs:29:45 - | -LL | let _: i32 = points.iter().map(|Point { x, y }| y).sum(); - | ^ help: try ignoring the field: `x: _` - error: unused variable: `f1` --> $DIR/issue-54180-unused-ref-field.rs:26:13 | @@ -29,5 +23,11 @@ error: unused variable: `x` LL | Point { y, ref mut x } => y, | ^^^^^^^^^ help: try ignoring the field: `x: _` +error: unused variable: `x` + --> $DIR/issue-54180-unused-ref-field.rs:29:45 + | +LL | let _: i32 = points.iter().map(|Point { x, y }| y).sum(); + | ^ help: try ignoring the field: `x: _` + error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/unused/lint-unused-variables.stderr b/src/test/ui/lint/unused/lint-unused-variables.stderr index d6e684e8306..fd9a5bcbfc4 100644 --- a/src/test/ui/lint/unused/lint-unused-variables.stderr +++ b/src/test/ui/lint/unused/lint-unused-variables.stderr @@ -17,55 +17,55 @@ LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `a` - --> $DIR/lint-unused-variables.rs:68:9 + --> $DIR/lint-unused-variables.rs:22:9 | LL | a: i32, | ^ help: if this is intentional, prefix it with an underscore: `_a` error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:74:9 + --> $DIR/lint-unused-variables.rs:29:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:42:9 + --> $DIR/lint-unused-variables.rs:34:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:47:9 + --> $DIR/lint-unused-variables.rs:42:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` -error: unused variable: `a` - --> $DIR/lint-unused-variables.rs:22:9 - | -LL | a: i32, - | ^ help: if this is intentional, prefix it with an underscore: `_a` - error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:29:9 + --> $DIR/lint-unused-variables.rs:47:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:34:9 + --> $DIR/lint-unused-variables.rs:55:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:55:9 + --> $DIR/lint-unused-variables.rs:60:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` +error: unused variable: `a` + --> $DIR/lint-unused-variables.rs:68:9 + | +LL | a: i32, + | ^ help: if this is intentional, prefix it with an underscore: `_a` + error: unused variable: `b` - --> $DIR/lint-unused-variables.rs:60:9 + --> $DIR/lint-unused-variables.rs:74:9 | LL | b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` diff --git a/src/test/ui/liveness/liveness-consts.stderr b/src/test/ui/liveness/liveness-consts.stderr index adaf5431629..16209d16c19 100644 --- a/src/test/ui/liveness/liveness-consts.stderr +++ b/src/test/ui/liveness/liveness-consts.stderr @@ -39,12 +39,6 @@ warning: unused variable: `z` LL | pub fn f(x: [u8; { let s = 17; 100 }]) -> [u8; { let z = 18; 100 }] { | ^ help: if this is intentional, prefix it with an underscore: `_z` -warning: unused variable: `z` - --> $DIR/liveness-consts.rs:60:13 - | -LL | let z = 42; - | ^ help: if this is intentional, prefix it with an underscore: `_z` - warning: value assigned to `t` is never read --> $DIR/liveness-consts.rs:42:9 | @@ -59,5 +53,11 @@ warning: unused variable: `w` LL | let w = 10; | ^ help: if this is intentional, prefix it with an underscore: `_w` +warning: unused variable: `z` + --> $DIR/liveness-consts.rs:60:13 + | +LL | let z = 42; + | ^ help: if this is intentional, prefix it with an underscore: `_z` + warning: 8 warnings emitted diff --git a/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr b/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr index 1ced8d8a14a..6d18d295cfc 100644 --- a/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr +++ b/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr @@ -23,97 +23,97 @@ LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` error: unused variable: `a` - --> $DIR/param-attrs-cfg.rs:107:27 + --> $DIR/param-attrs-cfg.rs:41:27 | LL | #[cfg(something)] a: i32, | ^ help: if this is intentional, prefix it with an underscore: `_a` error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:113:27 + --> $DIR/param-attrs-cfg.rs:48:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:115:44 + --> $DIR/param-attrs-cfg.rs:50:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:67:27 + --> $DIR/param-attrs-cfg.rs:56:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:69:44 + --> $DIR/param-attrs-cfg.rs:58:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:75:27 + --> $DIR/param-attrs-cfg.rs:67:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:77:44 + --> $DIR/param-attrs-cfg.rs:69:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` -error: unused variable: `a` - --> $DIR/param-attrs-cfg.rs:41:27 - | -LL | #[cfg(something)] a: i32, - | ^ help: if this is intentional, prefix it with an underscore: `_a` - error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:48:27 + --> $DIR/param-attrs-cfg.rs:75:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:50:44 + --> $DIR/param-attrs-cfg.rs:77:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:56:27 + --> $DIR/param-attrs-cfg.rs:86:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:58:44 + --> $DIR/param-attrs-cfg.rs:88:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:86:27 + --> $DIR/param-attrs-cfg.rs:94:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:88:44 + --> $DIR/param-attrs-cfg.rs:96:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` +error: unused variable: `a` + --> $DIR/param-attrs-cfg.rs:107:27 + | +LL | #[cfg(something)] a: i32, + | ^ help: if this is intentional, prefix it with an underscore: `_a` + error: unused variable: `b` - --> $DIR/param-attrs-cfg.rs:94:27 + --> $DIR/param-attrs-cfg.rs:113:27 | LL | #[cfg(something)] b: i32, | ^ help: if this is intentional, prefix it with an underscore: `_b` error: unused variable: `c` - --> $DIR/param-attrs-cfg.rs:96:44 + --> $DIR/param-attrs-cfg.rs:115:44 | LL | #[cfg_attr(nothing, cfg(nothing))] c: i32, | ^ help: if this is intentional, prefix it with an underscore: `_c` |