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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/CodeGen/X86/dbg-changes-codegen-branch-folding.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/CodeGen/X86/dbg-changes-codegen-branch-folding.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll b/llvm/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll index bee8107cd4b..54bd4892683 100644 --- a/llvm/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll +++ b/llvm/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll @@ -48,7 +48,7 @@ @.str2 = private unnamed_addr constant [2 x i8] c"-\00", align 1 ; Function Attrs: uwtable -define void @_Z3barii(i32 %param1, i32 %param2) #0 { +define void @_Z3barii(i32 %param1, i32 %param2) #0 !dbg !24 { entry: %var1 = alloca %struct.AAA3, align 1 %var2 = alloca %struct.AAA3, align 1 @@ -137,7 +137,7 @@ attributes #2 = { nounwind readnone } !21 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !22) !22 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !"_ZTS4AAA3") !23 = !{!24, !35, !40} -!24 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barii", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 11, file: !1, scope: !25, type: !26, function: void (i32, i32)* @_Z3barii, variables: !29) +!24 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barii", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 11, file: !1, scope: !25, type: !26, variables: !29) !25 = !DIFile(filename: "dbg-changes-codegen-branch-folding.cpp", directory: "/tmp/dbginfo") !26 = !DISubroutineType(types: !27) !27 = !{null, !28, !28} |
