diff options
| 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 | 5f220beefcb655de6aae7c80b456fd4e5cb76ac0 (patch) | |
| tree | d478c6bd28ca4a860f194ccd49ec67aa8f6b062e /test/CodeGen/PowerPC/dbg.ll | |
| parent | cc5dc01d7f7b6acdc7160fe30fda00e3b1b48687 (diff) | |
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252219 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/dbg.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/dbg.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/test/CodeGen/PowerPC/dbg.ll b/test/CodeGen/PowerPC/dbg.ll index 9b33134babe..b636cff0f20 100644 --- a/test/CodeGen/PowerPC/dbg.ll +++ b/test/CodeGen/PowerPC/dbg.ll @@ -4,7 +4,7 @@ target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64" target triple = "powerpc64-unknown-linux-gnu" -define i32 @main(i32 %argc, i8** nocapture %argv) nounwind readnone { +define i32 @main(i32 %argc, i8** nocapture %argv) nounwind readnone !dbg !5 { entry: tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !15, metadata !DIExpression()), !dbg !17 tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !16, metadata !DIExpression()), !dbg !18 @@ -20,7 +20,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.1", isOptimized: true, emissionKind: 0, file: !21, enums: !1, retainedTypes: !1, subprograms: !3, globals: !1, imports: !1) !1 = !{} !3 = !{!5} -!5 = distinct !DISubprogram(name: "main", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, file: !21, scope: null, type: !7, function: i32 (i32, i8**)* @main, variables: !13) +!5 = distinct !DISubprogram(name: "main", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, file: !21, scope: null, type: !7, variables: !13) !6 = !DIFile(filename: "dbg.c", directory: "/src") !7 = !DISubroutineType(types: !8) !8 = !{!9, !9, !10} |