Rollup merge of #42266 - rkruppe:clean-trans-api, r=arielb1

Remove unused APIs from rustc_trans

There were public re-exports of some rustc modules dating back to 2011 or so. While I was at it, some functions and modules were public but never used outside the crate. I made them private or `pub(crate)` as appropriate and in one case removed an unused function.

18 files changed, 50 insertions, 72 deletions

diff --git a/src/librustc_trans/assert_module_sources.rs b/src/librustc_trans/assert_module_sources.rs
index 63cfe591ce3..b5ef4aac34c 100644
--- a/src/librustc_trans/assert_module_sources.rs
+++ b/src/librustc_trans/assert_module_sources.rs
@@ -40,8 +40,8 @@ const CFG: &'static str = "cfg";
 #[derive(Debug, PartialEq)]
 enum Disposition { Reused, Translated }
 
-pub fn assert_module_sources<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
-                                       modules: &[ModuleTranslation]) {
+pub(crate) fn assert_module_sources<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
+                                              modules: &[ModuleTranslation]) {
     let _ignore = tcx.dep_graph.in_ignore();
 
     if tcx.sess.opts.incremental.is_none() {
diff --git a/src/librustc_trans/back/link.rs b/src/librustc_trans/back/link.rs
index f85d3f9f54d..e4026723880 100644
--- a/src/librustc_trans/back/link.rs
+++ b/src/librustc_trans/back/link.rs
@@ -14,18 +14,16 @@ use super::rpath::RPathConfig;
 use super::rpath;
 use super::msvc;
 use metadata::METADATA_FILENAME;
-use session::config;
-use session::config::NoDebugInfo;
-use session::config::{OutputFilenames, Input, OutputType};
-use session::filesearch;
-use session::search_paths::PathKind;
-use session::Session;
-use middle::cstore::{self, LinkMeta, NativeLibrary, LibSource};
-use middle::cstore::{LinkagePreference, NativeLibraryKind};
-use middle::dependency_format::Linkage;
+use rustc::session::config::{self, NoDebugInfo, OutputFilenames, Input, OutputType};
+use rustc::session::filesearch;
+use rustc::session::search_paths::PathKind;
+use rustc::session::Session;
+use rustc::middle::cstore::{self, LinkMeta, NativeLibrary, LibSource, LinkagePreference,
+                            NativeLibraryKind};
+use rustc::middle::dependency_format::Linkage;
 use CrateTranslation;
-use util::common::time;
-use util::fs::fix_windows_verbatim_for_gcc;
+use rustc::util::common::time;
+use rustc::util::fs::fix_windows_verbatim_for_gcc;
 use rustc::dep_graph::DepNode;
 use rustc::hir::def_id::CrateNum;
 use rustc::hir::svh::Svh;
diff --git a/src/librustc_trans/back/linker.rs b/src/librustc_trans/back/linker.rs
index 61c57f00de7..0b15886083a 100644
--- a/src/librustc_trans/back/linker.rs
+++ b/src/librustc_trans/back/linker.rs
@@ -20,11 +20,11 @@ use context::SharedCrateContext;
 
 use back::archive;
 use back::symbol_export::{self, ExportedSymbols};
-use middle::dependency_format::Linkage;
+use rustc::middle::dependency_format::Linkage;
 use rustc::hir::def_id::{LOCAL_CRATE, CrateNum};
 use rustc_back::LinkerFlavor;
-use session::Session;
-use session::config::{self, CrateType, OptLevel, DebugInfoLevel};
+use rustc::session::Session;
+use rustc::session::config::{self, CrateType, OptLevel, DebugInfoLevel};
 use serialize::{json, Encoder};
 
 /// For all the linkers we support, and information they might
diff --git a/src/librustc_trans/back/msvc/mod.rs b/src/librustc_trans/back/msvc/mod.rs
index 31f3415b1ec..97648888fa9 100644
--- a/src/librustc_trans/back/msvc/mod.rs
+++ b/src/librustc_trans/back/msvc/mod.rs
@@ -52,7 +52,7 @@ mod platform {
     use std::fs;
     use std::path::{Path, PathBuf};
     use std::process::Command;
-    use session::Session;
+    use rustc::session::Session;
     use super::arch::{host_arch, Arch};
     use super::registry::LOCAL_MACHINE;
 
@@ -296,7 +296,7 @@ mod platform {
 mod platform {
     use std::path::PathBuf;
     use std::process::Command;
-    use session::Session;
+    use rustc::session::Session;
     pub fn link_exe_cmd(_sess: &Session) -> (Command, Option<PathBuf>) {
         (Command::new("link.exe"), None)
     }
diff --git a/src/librustc_trans/back/symbol_export.rs b/src/librustc_trans/back/symbol_export.rs
index ddd86c46799..ef75de04045 100644
--- a/src/librustc_trans/back/symbol_export.rs
+++ b/src/librustc_trans/back/symbol_export.rs
@@ -10,7 +10,7 @@
 
 use context::SharedCrateContext;
 use monomorphize::Instance;
-use util::nodemap::FxHashMap;
+use rustc::util::nodemap::FxHashMap;
 use rustc::hir::def_id::{DefId, CrateNum, LOCAL_CRATE};
 use rustc::session::config;
 use rustc::ty::TyCtxt;
diff --git a/src/librustc_trans/back/symbol_names.rs b/src/librustc_trans/back/symbol_names.rs
index 1aed2932948..8e14335ceac 100644
--- a/src/librustc_trans/back/symbol_names.rs
+++ b/src/librustc_trans/back/symbol_names.rs
@@ -348,16 +348,6 @@ impl ItemPathBuffer for SymbolPathBuffer {
     }
 }
 
-pub fn exported_name_from_type_and_prefix<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
-                                                    t: Ty<'tcx>,
-                                                    prefix: &str)
-                                                    -> String {
-    let hash = get_symbol_hash(tcx, None, t, None);
-    let mut buffer = SymbolPathBuffer::new();
-    buffer.push(prefix);
-    buffer.finish(hash)
-}
-
 // Name sanitation. LLVM will happily accept identifiers with weird names, but
 // gas doesn't!
 // gas accepts the following characters in symbols: a-z, A-Z, 0-9, ., _, $
diff --git a/src/librustc_trans/back/write.rs b/src/librustc_trans/back/write.rs
index 3492403a1bf..6ed0cb0092f 100644
--- a/src/librustc_trans/back/write.rs
+++ b/src/librustc_trans/back/write.rs
@@ -12,16 +12,15 @@ use back::lto;
 use back::link::{get_linker, remove};
 use back::symbol_export::ExportedSymbols;
 use rustc_incremental::{save_trans_partition, in_incr_comp_dir};
-use session::config::{OutputFilenames, OutputTypes, Passes, SomePasses, AllPasses, Sanitizer};
-use session::Session;
-use session::config::{self, OutputType};
+use rustc::session::config::{self, OutputFilenames, OutputType, OutputTypes, Passes, SomePasses,
+                             AllPasses, Sanitizer};
+use rustc::session::Session;
 use llvm;
 use llvm::{ModuleRef, TargetMachineRef, PassManagerRef, DiagnosticInfoRef, ContextRef};
 use llvm::SMDiagnosticRef;
 use {CrateTranslation, ModuleLlvm, ModuleSource, ModuleTranslation};
-use util::common::{time, time_depth, set_time_depth};
-use util::common::path2cstr;
-use util::fs::link_or_copy;
+use rustc::util::common::{time, time_depth, set_time_depth, path2cstr};
+use rustc::util::fs::link_or_copy;
 use errors::{self, Handler, Level, DiagnosticBuilder};
 use errors::emitter::Emitter;
 use syntax_pos::MultiSpan;
diff --git a/src/librustc_trans/base.rs b/src/librustc_trans/base.rs
index 437ced85b2e..1b3f0ba7ce5 100644
--- a/src/librustc_trans/base.rs
+++ b/src/librustc_trans/base.rs
@@ -36,16 +36,16 @@ use llvm::{ContextRef, Linkage, ModuleRef, ValueRef, Vector, get_param};
 use llvm;
 use metadata;
 use rustc::hir::def_id::LOCAL_CRATE;
-use middle::lang_items::StartFnLangItem;
-use middle::cstore::EncodedMetadata;
+use rustc::middle::lang_items::StartFnLangItem;
+use rustc::middle::cstore::EncodedMetadata;
 use rustc::ty::{self, Ty, TyCtxt};
 use rustc::dep_graph::AssertDepGraphSafe;
 use rustc::middle::cstore::LinkMeta;
 use rustc::hir::map as hir_map;
 use rustc::util::common::time;
-use session::config::{self, NoDebugInfo};
+use rustc::session::config::{self, NoDebugInfo};
+use rustc::session::{self, DataTypeKind, Session};
 use rustc_incremental::IncrementalHashesMap;
-use session::{self, DataTypeKind, Session};
 use abi;
 use mir::lvalue::LvalueRef;
 use attributes;
@@ -71,7 +71,7 @@ use trans_item::{TransItem, DefPathBasedNames};
 use type_::Type;
 use type_of;
 use value::Value;
-use util::nodemap::{NodeSet, FxHashMap, FxHashSet};
+use rustc::util::nodemap::{NodeSet, FxHashMap, FxHashSet};
 
 use libc::c_uint;
 use std::ffi::{CStr, CString};
diff --git a/src/librustc_trans/collector.rs b/src/librustc_trans/collector.rs
index 5f8b79a994a..672a37a0bd5 100644
--- a/src/librustc_trans/collector.rs
+++ b/src/librustc_trans/collector.rs
@@ -204,7 +204,7 @@ use rustc::mir::visit::Visitor as MirVisitor;
 use context::SharedCrateContext;
 use common::{def_ty, instance_ty};
 use monomorphize::{self, Instance};
-use util::nodemap::{FxHashSet, FxHashMap, DefIdMap};
+use rustc::util::nodemap::{FxHashSet, FxHashMap, DefIdMap};
 
 use trans_item::{TransItem, DefPathBasedNames, InstantiationMode};
 
diff --git a/src/librustc_trans/common.rs b/src/librustc_trans/common.rs
index efd4f136785..fc48ec6b5c5 100644
--- a/src/librustc_trans/common.rs
+++ b/src/librustc_trans/common.rs
@@ -17,7 +17,7 @@ use llvm::{ValueRef, ContextRef, TypeKind};
 use llvm::{True, False, Bool, OperandBundleDef};
 use rustc::hir::def_id::DefId;
 use rustc::hir::map::DefPathData;
-use middle::lang_items::LangItem;
+use rustc::middle::lang_items::LangItem;
 use base;
 use builder::Builder;
 use consts;
diff --git a/src/librustc_trans/context.rs b/src/librustc_trans/context.rs
index 0dece586c93..c3b16c2d07d 100644
--- a/src/librustc_trans/context.rs
+++ b/src/librustc_trans/context.rs
@@ -26,10 +26,9 @@ use rustc_data_structures::base_n;
 use rustc::ty::subst::Substs;
 use rustc::ty::{self, Ty, TyCtxt};
 use rustc::ty::layout::{LayoutTyper, TyLayout};
-use session::config::NoDebugInfo;
-use session::Session;
-use session::config;
-use util::nodemap::{NodeSet, DefIdMap, FxHashMap};
+use rustc::session::config::{self, NoDebugInfo};
+use rustc::session::Session;
+use rustc::util::nodemap::{NodeSet, DefIdMap, FxHashMap};
 
 use std::ffi::{CStr, CString};
 use std::cell::{Cell, RefCell};
diff --git a/src/librustc_trans/debuginfo/gdb.rs b/src/librustc_trans/debuginfo/gdb.rs
index 4567ec8b452..14d3fa49553 100644
--- a/src/librustc_trans/debuginfo/gdb.rs
+++ b/src/librustc_trans/debuginfo/gdb.rs
@@ -16,7 +16,7 @@ use common::{C_bytes, CrateContext, C_i32};
 use builder::Builder;
 use declare;
 use type_::Type;
-use session::config::NoDebugInfo;
+use rustc::session::config::NoDebugInfo;
 
 use std::ptr;
 use syntax::attr;
diff --git a/src/librustc_trans/debuginfo/metadata.rs b/src/librustc_trans/debuginfo/metadata.rs
index 7d8b8161abe..fea24e6da87 100644
--- a/src/librustc_trans/debuginfo/metadata.rs
+++ b/src/librustc_trans/debuginfo/metadata.rs
@@ -19,7 +19,6 @@ use super::namespace::mangled_name_of_item;
 use super::type_names::compute_debuginfo_type_name;
 use super::{CrateDebugContext};
 use context::SharedCrateContext;
-use session::Session;
 
 use llvm::{self, ValueRef};
 use llvm::debuginfo::{DIType, DIFile, DIScope, DIDescriptor,
@@ -37,8 +36,8 @@ use common::{self, CrateContext};
 use type_::Type;
 use rustc::ty::{self, AdtKind, Ty};
 use rustc::ty::layout::{self, LayoutTyper};
-use session::config;
-use util::nodemap::FxHashMap;
+use rustc::session::{Session, config};
+use rustc::util::nodemap::FxHashMap;
 
 use libc::{c_uint, c_longlong};
 use std::ffi::CString;
diff --git a/src/librustc_trans/debuginfo/mod.rs b/src/librustc_trans/debuginfo/mod.rs
index ebe42a2b908..4d781d6f77d 100644
--- a/src/librustc_trans/debuginfo/mod.rs
+++ b/src/librustc_trans/debuginfo/mod.rs
@@ -32,8 +32,8 @@ use builder::Builder;
 use monomorphize::Instance;
 use rustc::ty::{self, Ty};
 use rustc::mir;
-use session::config::{self, FullDebugInfo, LimitedDebugInfo, NoDebugInfo};
-use util::nodemap::{DefIdMap, FxHashMap, FxHashSet};
+use rustc::session::config::{self, FullDebugInfo, LimitedDebugInfo, NoDebugInfo};
+use rustc::util::nodemap::{DefIdMap, FxHashMap, FxHashSet};
 
 use libc::c_uint;
 use std::cell::{Cell, RefCell};
diff --git a/src/librustc_trans/lib.rs b/src/librustc_trans/lib.rs
index 3ac0d88b90d..c111a3983e7 100644
--- a/src/librustc_trans/lib.rs
+++ b/src/librustc_trans/lib.rs
@@ -63,11 +63,6 @@ extern crate syntax_pos;
 extern crate rustc_errors as errors;
 extern crate serialize;
 
-pub use rustc::session;
-pub use rustc::middle;
-pub use rustc::lint;
-pub use rustc::util;
-
 pub use base::trans_crate;
 pub use back::symbol_names::provide;
 
@@ -75,20 +70,18 @@ pub use metadata::LlvmMetadataLoader;
 pub use llvm_util::{init, target_features, print_version, print_passes, print, enable_llvm_debug};
 
 pub mod back {
-    pub use rustc::hir::svh;
-
-    pub mod archive;
-    pub mod linker;
+    mod archive;
+    pub(crate) mod linker;
     pub mod link;
-    pub mod lto;
-    pub mod symbol_export;
-    pub mod symbol_names;
+    mod lto;
+    pub(crate) mod symbol_export;
+    pub(crate) mod symbol_names;
     pub mod write;
-    pub mod msvc;
-    pub mod rpath;
+    mod msvc;
+    mod rpath;
 }
 
-pub mod diagnostics;
+mod diagnostics;
 
 mod abi;
 mod adt;
@@ -171,8 +164,8 @@ pub struct CrateTranslation {
     pub crate_name: Symbol,
     pub modules: Vec<ModuleTranslation>,
     pub metadata_module: ModuleTranslation,
-    pub link: middle::cstore::LinkMeta,
-    pub metadata: middle::cstore::EncodedMetadata,
+    pub link: rustc::middle::cstore::LinkMeta,
+    pub metadata: rustc::middle::cstore::EncodedMetadata,
     pub exported_symbols: back::symbol_export::ExportedSymbols,
     pub no_builtins: bool,
     pub windows_subsystem: Option<String>,
diff --git a/src/librustc_trans/mir/mod.rs b/src/librustc_trans/mir/mod.rs
index 19a556bf3f0..aa20d70978c 100644
--- a/src/librustc_trans/mir/mod.rs
+++ b/src/librustc_trans/mir/mod.rs
@@ -17,7 +17,7 @@ use rustc::mir::{self, Mir};
 use rustc::mir::tcx::LvalueTy;
 use rustc::ty::subst::Substs;
 use rustc::infer::TransNormalize;
-use session::config::FullDebugInfo;
+use rustc::session::config::FullDebugInfo;
 use base;
 use builder::Builder;
 use common::{self, CrateContext, Funclet};
diff --git a/src/librustc_trans/mir/rvalue.rs b/src/librustc_trans/mir/rvalue.rs
index 667075e6970..fc4130942a1 100644
--- a/src/librustc_trans/mir/rvalue.rs
+++ b/src/librustc_trans/mir/rvalue.rs
@@ -14,7 +14,7 @@ use rustc::ty::cast::{CastTy, IntTy};
 use rustc::ty::layout::{Layout, LayoutTyper};
 use rustc::mir::tcx::LvalueTy;
 use rustc::mir;
-use middle::lang_items::ExchangeMallocFnLangItem;
+use rustc::middle::lang_items::ExchangeMallocFnLangItem;
 
 use base;
 use builder::Builder;
diff --git a/src/librustc_trans/partitioning.rs b/src/librustc_trans/partitioning.rs
index 2c76cdeb48c..2fe463e92a8 100644
--- a/src/librustc_trans/partitioning.rs
+++ b/src/librustc_trans/partitioning.rs
@@ -118,7 +118,7 @@ use std::sync::Arc;
 use syntax::ast::NodeId;
 use syntax::symbol::{Symbol, InternedString};
 use trans_item::{TransItem, InstantiationMode};
-use util::nodemap::{FxHashMap, FxHashSet};
+use rustc::util::nodemap::{FxHashMap, FxHashSet};
 
 pub enum PartitioningStrategy {
     /// Generate one codegen unit per source-level module.