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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/union-template.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/union-template.ll')
| -rw-r--r-- | llvm/test/DebugInfo/X86/union-template.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/DebugInfo/X86/union-template.ll b/llvm/test/DebugInfo/X86/union-template.ll index c7f018104b4..1f91f2a129f 100644 --- a/llvm/test/DebugInfo/X86/union-template.ll +++ b/llvm/test/DebugInfo/X86/union-template.ll @@ -11,7 +11,7 @@ @_ZN7PR156371fE = global %"union.PR15637::Value" zeroinitializer, align 4 -define void @_ZN7PR156371gEf(float %value) #0 { +define void @_ZN7PR156371gEf(float %value) #0 !dbg !4 { entry: %value.addr = alloca float, align 4 %tempValue = alloca %"union.PR15637::Value", align 4 @@ -33,7 +33,7 @@ attributes #1 = { nounwind readnone } !1 = !DIFile(filename: "foo.cc", directory: "/usr/local/google/home/echristo/tmp") !2 = !{} !3 = !{!4} -!4 = distinct !DISubprogram(name: "g", linkageName: "_ZN7PR156371gEf", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, function: void (float)* @_ZN7PR156371gEf, variables: !2) +!4 = distinct !DISubprogram(name: "g", linkageName: "_ZN7PR156371gEf", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, variables: !2) !5 = !DINamespace(name: "PR15637", line: 1, file: !1, scope: null) !6 = !DISubroutineType(types: !7) !7 = !{null, !8} |
