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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
42 lines
1.3 KiB
LLVM
42 lines
1.3 KiB
LLVM
; RUN: llc -disable-fp-elim -O0 %s -mtriple sparc -o - | FileCheck %s
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; int func(void);
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; void prologue_end_test() {
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; func();
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; func();
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; }
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define void @prologue_end_test() nounwind uwtable !dbg !4 {
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; CHECK: prologue_end_test:
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; CHECK: .cfi_startproc
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; CHECK: save %sp
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; CHECK: .loc 1 3 3 prologue_end
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; CHECK: call func
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; CHECK: call func
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entry:
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%call = call i32 @func(), !dbg !11
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%call1 = call i32 @func(), !dbg !12
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ret void, !dbg !13
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}
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declare i32 @func()
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.ident = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.7.0 (trunk 242129)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
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!1 = !DIFile(filename: "foo.c", directory: "/tmp")
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!2 = !{}
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!3 = !{!4}
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!4 = distinct !DISubprogram(name: "prologue_end_test", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: false, variables: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null}
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!7 = !{i32 2, !"Dwarf Version", i32 2}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"PIC Level", i32 2}
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!10 = !{!"clang version 3.7.0 (trunk 242129)"}
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!11 = !DILocation(line: 3, column: 3, scope: !4)
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!12 = !DILocation(line: 4, column: 3, scope: !4)
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!13 = !DILocation(line: 5, column: 1, scope: !4)
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