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Debug info: use the file a typedef is defined in as its decl_file instead 

of the current compilation unit.
As a side effect this enables many more LTO uniquing opportunities.

This reapplies r199757 with a better testcase.

llvm-svn: 199760
This commit is contained in:
Adrian Prantl 2014-01-21 18:42:27 +00:00
parent a88d7abeb1
commit 3eff225a44
2 changed files with 15 additions and 2 deletions
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6
clang/lib/CodeGen/CGDebugInfo.cpp
View File

@ -739,14 +739,16 @@ llvm::DIType CGDebugInfo::CreateType(const TypedefType *Ty, llvm::DIFile Unit) {
return llvm::DIType();
// We don't set size information, but do specify where the typedef was
// declared.
unsigned Line = getLineNumber(Ty->getDecl()->getLocation());
SourceLocation Loc = Ty->getDecl()->getLocation();
llvm::DIFile File = getOrCreateFile(Loc);
unsigned Line = getLineNumber(Loc);
const TypedefNameDecl *TyDecl = Ty->getDecl();
llvm::DIDescriptor TypedefContext =
getContextDescriptor(cast<Decl>(Ty->getDecl()->getDeclContext()));
return
DBuilder.createTypedef(Src, TyDecl->getName(), Unit, Line, TypedefContext);
DBuilder.createTypedef(Src, TyDecl->getName(), File, Line, TypedefContext);
}
llvm::DIType CGDebugInfo::CreateType(const FunctionType *Ty,

11
clang/test/CodeGen/debug-info-typedef.c Normal file
View File

@ -0,0 +1,11 @@
// RUN: %clang_cc1 -emit-llvm -g -I%p %s -o - | FileCheck %s
// Test that the location of the typedef points to the header file.
#line 1 "a.c"
#line 2 "b.h"
typedef int MyType;
#line 2 "a.c"
MyType a;
// CHECK: metadata ![[HEADER:[0-9]+]], null, metadata !"MyType"{{.*}} ; [ DW_TAG_typedef ] [MyType] [line 2, size 0, align 0, offset 0] [from int]
// CHECK: ![[HEADER]] = metadata !{metadata !"b.h",