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| author | Peter Collingbourne <peter@pcc.me.uk> | 2015-11-05 22:03:56 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2015-11-05 22:03:56 +0000 |
| commit | d4bff30370db9f2cb13838897012768739cf1ee0 (patch) | |
| tree | f6c80f666794291c78575617d326207f57939b61 /llvm/test/DebugInfo/X86/DW_AT_location-reference.ll | |
| parent | 18da38edb315fe9e063348c4d785b26111b6d7ec (diff) | |
| download | bcm5719-llvm-d4bff30370db9f2cb13838897012768739cf1ee0.tar.gz bcm5719-llvm-d4bff30370db9f2cb13838897012768739cf1ee0.zip | |
DI: Reverse direction of subprogram -> function edge.
Previously, subprograms contained a metadata reference to the function they
described. Because most clients need to get or set a subprogram for a given
function rather than the other way around, this created unneeded inefficiency.
For example, many passes needed to call the function llvm::makeSubprogramMap()
to build a mapping from functions to subprograms, and the IR linker needed to
fix up function references in a way that caused quadratic complexity in the IR
linking phase of LTO.
This change reverses the direction of the edge by storing the subprogram as
function-level metadata and removing DISubprogram's function field.
Since this is an IR change, a bitcode upgrade has been provided.
Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is
attached to the PR.
Differential Revision: http://reviews.llvm.org/D14265
llvm-svn: 252219
Diffstat (limited to 'llvm/test/DebugInfo/X86/DW_AT_location-reference.ll')
| -rw-r--r-- | llvm/test/DebugInfo/X86/DW_AT_location-reference.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll b/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll index fee2e24ca65..593611d76bc 100644 --- a/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll +++ b/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll @@ -60,7 +60,7 @@ target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3 @a = external global i32 -define void @f() nounwind { +define void @f() nounwind !dbg !0 { entry: %call = tail call i32 @g(i32 0, i32 0) nounwind, !dbg !8 store i32 %call, i32* @a, align 4, !dbg !8 @@ -102,7 +102,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon !llvm.dbg.cu = !{!2} !llvm.module.flags = !{!24} -!0 = distinct !DISubprogram(name: "f", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !23, scope: !1, type: !3, function: void ()* @f, variables: !22) +!0 = distinct !DISubprogram(name: "f", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !23, scope: !1, type: !3, variables: !22) !1 = !DIFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation") !2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk)", isOptimized: true, emissionKind: 1, file: !23, enums: !{}, retainedTypes: !{}, subprograms: !21, imports: null) !3 = !DISubroutineType(types: !4) |
