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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/debug-loc-empty-entries.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/debug-loc-empty-entries.ll')
| -rw-r--r-- | llvm/test/DebugInfo/X86/debug-loc-empty-entries.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/DebugInfo/X86/debug-loc-empty-entries.ll b/llvm/test/DebugInfo/X86/debug-loc-empty-entries.ll index 586b944c965..776bdbddfb0 100644 --- a/llvm/test/DebugInfo/X86/debug-loc-empty-entries.ll +++ b/llvm/test/DebugInfo/X86/debug-loc-empty-entries.ll @@ -24,7 +24,7 @@ ;; } ; Function Attrs: noreturn nounwind readnone -define void @_Z3fn1v() #0 { +define void @_Z3fn1v() #0 !dbg !4 { entry: tail call void @llvm.dbg.value(metadata float 1.000000e+00, i64 0, metadata !9, metadata !14), !dbg !15 br label %for.cond, !dbg !16 @@ -48,7 +48,7 @@ attributes #1 = { nounwind readnone } !1 = !DIFile(filename: "<stdin>", directory: "/Users/dexonsmith/data/llvm/bootstrap/play/delta2/testcase") !2 = !{} !3 = !{!4} -!4 = distinct !DISubprogram(name: "fn1", linkageName: "_Z3fn1v", scope: !5, file: !5, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, function: void ()* @_Z3fn1v, variables: !8) +!4 = distinct !DISubprogram(name: "fn1", linkageName: "_Z3fn1v", scope: !5, file: !5, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, variables: !8) !5 = !DIFile(filename: "t.cpp", directory: "/Users/dexonsmith/data/llvm/bootstrap/play/delta2/testcase") !6 = !DISubroutineType(types: !7) !7 = !{null} |
