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5f220beefc
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
37 lines
1.5 KiB
LLVM
37 lines
1.5 KiB
LLVM
; RUN: llc -disable-fp-elim -O0 %s -mtriple x86_64-unknown-linux-gnu -o - | FileCheck %s
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; int callme(int);
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; int isel_line_test2() {
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; callme(400);
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; return 0;
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; }
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define i32 @isel_line_test2() nounwind uwtable !dbg !5 {
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; The stack adjustment should be part of the prologue.
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; CHECK: isel_line_test2:
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; CHECK: {{subq|leaq}} {{.*}}, %rsp
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; CHECK: .loc 1 5 3 prologue_end
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entry:
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%call = call i32 @callme(i32 400), !dbg !10
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ret i32 0, !dbg !12
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}
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declare i32 @callme(i32)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!14}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.2 (trunk 164980) (llvm/trunk 164979)", isOptimized: false, emissionKind: 0, file: !13, enums: !1, retainedTypes: !1, subprograms: !3, globals: !1, imports: !1)
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!1 = !{}
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!3 = !{!5}
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!5 = distinct !DISubprogram(name: "isel_line_test2", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 4, file: !13, scope: !6, type: !7, variables: !1)
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!6 = !DIFile(filename: "bar.c", directory: "/usr/local/google/home/echristo/tmp")
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !DILocation(line: 5, column: 3, scope: !11)
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!11 = distinct !DILexicalBlock(line: 4, column: 1, file: !13, scope: !5)
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!12 = !DILocation(line: 6, column: 3, scope: !11)
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!13 = !DIFile(filename: "bar.c", directory: "/usr/local/google/home/echristo/tmp")
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!14 = !{i32 1, !"Debug Info Version", i32 3}
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