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| author | David Blaikie <dblaikie@gmail.com> | 2018-12-18 01:06:09 +0000 |
|---|---|---|
| committer | David Blaikie <dblaikie@gmail.com> | 2018-12-18 01:06:09 +0000 |
| commit | c4e08feb002ffc32d0f37505134c4eddb1a784f7 (patch) | |
| tree | 2a0b2851aa8132c1de878d99db28ab91dad0144a /llvm/test | |
| parent | 48a28c166518e238bb7c7b305f1473e75bc5ea7d (diff) | |
| download | bcm5719-llvm-c4e08feb002ffc32d0f37505134c4eddb1a784f7.tar.gz bcm5719-llvm-c4e08feb002ffc32d0f37505134c4eddb1a784f7.zip | |
Recommit r348806: DebugInfo: Use symbol difference for CU length to simplify assembly reading/editing
Mucking about simplifying a test case ( https://reviews.llvm.org/D55261 ) I stumbled across something I've hit before - that LLVM's (GCC's does too, FWIW) assembly output includes a hardcode length for a DWARF unit in its header. Instead we could emit a label difference - making the assembly easier to read/edit (though potentially at a slight (I haven't tried to observe it) performance cost of delaying/sinking the length computation into the MC layer).
Fix: Predicated all the changes (including creating the labels, even if they aren't used/needed) behind the NVPTX useSectionsAsReferences, avoiding emitting labels in NVPTX where ptxas can't parse them.
Reviewers: JDevlieghere, probinson, ABataev
Differential Revision: https://reviews.llvm.org/D55281
llvm-svn: 349430
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/DebugInfo/X86/length_symbol_difference.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/X86/length_symbol_difference.ll b/llvm/test/DebugInfo/X86/length_symbol_difference.ll new file mode 100644 index 00000000000..78684e788cf --- /dev/null +++ b/llvm/test/DebugInfo/X86/length_symbol_difference.ll @@ -0,0 +1,30 @@ +; RUN: llc -filetype=asm -O0 -mtriple=x86_64-linux-gnu < %s | FileCheck %s + +; CHECK: .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit +; CHECK-NEXT: .Ldebug_info_start0: +; CHECK-NOT: .byte 0 +; CHECK: .byte 0 # End Of Children Mark +; CHECK-NEXT: .Ldebug_info_end0: +; CHECK-NEXT: .section + + +define dso_local void @_Z2f1v() !dbg !7 { +entry: + ret void, !dbg !10 +} + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4, !5} +!llvm.ident = !{!6} + +!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 349394) (llvm/trunk 349377)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) +!1 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{i32 1, !"wchar_size", i32 4} +!6 = !{!"clang version 8.0.0 (trunk 349394) (llvm/trunk 349377)"} +!7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) +!8 = !DISubroutineType(types: !9) +!9 = !{null} +!10 = !DILocation(line: 1, column: 12, scope: !7) |
