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DebugInfo: Fix for missing comp_dir handling with r349207

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When deciding lazily whether a CU would be split or non-split I
accidentally dropped some handling for the line tables comp_dir (by
doing it lazily it was too late to be handled properly by the MC line
table code).

Move that bit of the code back to the non-lazy place.

llvm-svn: 349819
This commit is contained in:
David Blaikie 2018-12-20 20:46:55 +00:00
parent 2f06edc366
commit 431ea8bd7e
2 changed files with 42 additions and 9 deletions
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19
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -573,15 +573,6 @@ void DwarfDebug::finishUnitAttributes(const DICompileUnit *DIUnit,
DIE &Die = NewCU.getUnitDie();
StringRef FN = DIUnit->getFilename();
// LTO with assembly output shares a single line table amongst multiple CUs.
// To avoid the compilation directory being ambiguous, let the line table
// explicitly describe the directory of all files, never relying on the
// compilation directory.
if (!Asm->OutStreamer->hasRawTextSupport() || SingleCU)
Asm->OutStreamer->emitDwarfFile0Directive(
CompilationDir, FN, NewCU.getMD5AsBytes(DIUnit->getFile()),
DIUnit->getSource(), NewCU.getUniqueID());
StringRef Producer = DIUnit->getProducer();
StringRef Flags = DIUnit->getFlags();
if (!Flags.empty() && !useAppleExtensionAttributes()) {
@ -649,6 +640,16 @@ DwarfDebug::getOrCreateDwarfCompileUnit(const DICompileUnit *DIUnit) {
for (auto *IE : DIUnit->getImportedEntities())
NewCU.addImportedEntity(IE);
// LTO with assembly output shares a single line table amongst multiple CUs.
// To avoid the compilation directory being ambiguous, let the line table
// explicitly describe the directory of all files, never relying on the
// compilation directory.
if (!Asm->OutStreamer->hasRawTextSupport() || SingleCU)
Asm->OutStreamer->emitDwarfFile0Directive(
CompilationDir, DIUnit->getFilename(),
NewCU.getMD5AsBytes(DIUnit->getFile()), DIUnit->getSource(),
NewCU.getUniqueID());
if (useSplitDwarf()) {
NewCU.setSkeleton(constructSkeletonCU(NewCU));
NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoDWOSection());

32
test/DebugInfo/X86/lazy-fission-comp-dir.ll Normal file
View File

@ -0,0 +1,32 @@
; RUN: llc -split-dwarf-file=foo.dwo -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
; RUN: llvm-dwarfdump -debug-info -debug-line %t | FileCheck %s
; CHECK: .debug_info contents:
; CHECK: DW_AT_comp_dir ("/usr/local/google/home/blaikie/dev/scratch")
; CHECK: .debug_line contents:
; CHECK: file_names[ 1]:
; CHECK-NEXT: name: "main.c"
; CHECK-NEXT: dir_index: 0
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @main() !dbg !6 {
entry:
ret i32 0, !dbg !10
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!llvm.ident = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.0 (trunk 349782) (llvm/trunk 349794)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: GNU)
!1 = !DIFile(filename: "main.c", directory: "/usr/local/google/home/blaikie/dev/scratch")
!2 = !{}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{i32 1, !"wchar_size", i32 4}
!5 = !{!"clang version 8.0.0 (trunk 349782) (llvm/trunk 349794)"}
!6 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!7 = !DISubroutineType(types: !8)
!8 = !{!9}
!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!10 = !DILocation(line: 2, column: 1, scope: !6)