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Emit the linkage name instead of the function name, when available. This means

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that we'll prefer to emit the mangled C++ name (pending a clang change).

llvm-svn: 177371
This commit is contained in:
Nick Lewycky 2013-03-19 01:37:55 +00:00
parent b4a799cf7e
commit ddf6c7982c
2 changed files with 39 additions and 8 deletions
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22
lib/Transforms/Instrumentation/GCOVProfiling.cpp
View File

@ -142,6 +142,12 @@ ModulePass *llvm::createGCOVProfilerPass(const GCOVOptions &Options) {
return new GCOVProfiler(Options);
}
static std::string getFunctionName(DISubprogram SP) {
if (!SP.getLinkageName().empty())
return SP.getLinkageName();
return SP.getName();
}
namespace {
class GCOVRecord {
protected:
@ -290,7 +296,7 @@ namespace {
ReturnBlock = new GCOVBlock(i++, os);
writeBytes(FunctionTag, 4);
uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(SP.getName()) +
uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(getFunctionName(SP)) +
1 + lengthOfGCOVString(SP.getFilename()) + 1;
if (UseCfgChecksum)
++BlockLen;
@ -299,7 +305,7 @@ namespace {
write(0); // lineno checksum
if (UseCfgChecksum)
write(0); // cfg checksum
writeGCOVString(SP.getName());
writeGCOVString(getFunctionName(SP));
writeGCOVString(SP.getFilename());
write(SP.getLineNumber());
}
@ -724,12 +730,12 @@ Function *GCOVProfiler::insertCounterWriteout(
Builder.CreateGlobalStringPtr(ReversedVersion));
for (unsigned j = 0, e = CountersBySP.size(); j != e; ++j) {
DISubprogram SP(CountersBySP[j].second);
Builder.CreateCall3(EmitFunction,
Builder.getInt32(j),
Options.FunctionNamesInData ?
Builder.CreateGlobalStringPtr(SP.getName()) :
Constant::getNullValue(Builder.getInt8PtrTy()),
Builder.getInt8(Options.UseCfgChecksum));
Builder.CreateCall3(
EmitFunction, Builder.getInt32(j),
Options.FunctionNamesInData ?
Builder.CreateGlobalStringPtr(getFunctionName(SP)) :
Constant::getNullValue(Builder.getInt8PtrTy()),
Builder.getInt8(Options.UseCfgChecksum));
GlobalVariable *GV = CountersBySP[j].first;
unsigned Arcs =

25
test/Transforms/GCOVProfiling/linkagename.ll Normal file
View File

@ -0,0 +1,25 @@
; RUN: echo '!9 = metadata !{metadata !"%s", metadata !0}' > %t1
; RUN: cat %s %t1 > %t2
; RUN: opt -insert-gcov-profiling -disable-output < %t2
; RUN: grep _Z3foov %S/linkagename.gcno
; RUN: rm %S/linkagename.gcno
define void @_Z3foov() {
entry:
ret void, !dbg !8
}
!llvm.dbg.cu = !{!0}
!llvm.gcov = !{!9}
!0 = metadata !{i32 786449, i32 0, i32 4, metadata !1, metadata !"clang version 3.3 (trunk 177323)", i1 false, metadata !"", i32 0, metadata !3, metadata !3, metadata !4, metadata !3, metadata !""} ; [ DW_TAG_compile_unit ] [/home/nlewycky/hello.cc] [DW_LANG_C_plus_plus]
!1 = metadata !{i32 786473, metadata !2} ; [ DW_TAG_file_type ] [/home/nlewycky/hello.cc]
!2 = metadata !{metadata !"hello.cc", metadata !"/home/nlewycky"}
!3 = metadata !{i32 0}
!4 = metadata !{metadata !5}
!5 = metadata !{i32 786478, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"_Z3foov", metadata !1, i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z3foov, null, null, metadata !3, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [foo]
!6 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{null}
!8 = metadata !{i32 1, i32 0, metadata !5, null}