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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/misched-code-difference-with-debug.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/misched-code-difference-with-debug.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll b/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll index 2be1ba62d76..0a1ea830a41 100644 --- a/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll +++ b/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll @@ -43,7 +43,7 @@ entry: ; CHECK-LABEL: test_with_debug ; CHECK: movl [[A]], [[B]] ; CHECK-NEXT: movl [[A]], [[C]] -define void @test_with_debug() { +define void @test_with_debug() !dbg !13 { entry: %c = alloca %class.C, align 1 %0 = load i8, i8* @argc, align 1 @@ -75,7 +75,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) !10 = !DIDerivedType(baseType: !"_ZTS1C", tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial) !11 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) !12 = !{!13} -!13 = distinct !DISubprogram(name: "test_with_debug", linkageName: "test_with_debug", line: 6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !14, type: !15, function: void ()* @test_with_debug, variables: !17) +!13 = distinct !DISubprogram(name: "test_with_debug", linkageName: "test_with_debug", line: 6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !14, type: !15, variables: !17) !14 = !DIFile(filename: "test.cpp", directory: "") !15 = !DISubroutineType(types: !16) !16 = !{null} |
