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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
25 lines
1008 B
LLVM
25 lines
1008 B
LLVM
; RUN: llc -enable-dwarf-directory -mtriple x86_64-apple-darwin10.0.0 < %s | FileCheck %s
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; Radar 8884898
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; CHECK: file 1 "simple.c"
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declare i32 @printf(i8*, ...) nounwind
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define i32 @main() nounwind !dbg !6 {
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ret i32 0
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}
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!12}
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!1 = !DIFile(filename: "simple.c", directory: "/Users/manav/one/two")
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!2 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "LLVM build 00", isOptimized: true, emissionKind: 0, file: !10, enums: !11, retainedTypes: !11, subprograms: !9)
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!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!6 = distinct !DISubprogram(name: "main", linkageName: "main", line: 9, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, file: !10, scope: !1, type: !7)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!5}
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!9 = !{!6}
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!10 = !DIFile(filename: "simple.c", directory: "/Users/manav/one/two")
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!11 = !{}
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!12 = !{i32 1, !"Debug Info Version", i32 3}
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