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fb3abba237
Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
65 lines
3.1 KiB
LLVM
65 lines
3.1 KiB
LLVM
; RUN: llc -march=hexagon -enable-misched=false < %s | FileCheck %s
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; This testcase causes the scheduler to crash for some reason. Disable
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; it for now.
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target datalayout = "e-m:e-p:32:32-i64:64-a:0-v32:32-n16:32"
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target triple = "hexagon-unknown--elf"
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; Check that allocframe was packetized with the two adds.
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; CHECK: foo:
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; CHECK: {
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; CHECK-DAG: allocframe
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; CHECK-DAG: add
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; CHECK-DAG: add
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; CHECK: }
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; CHECK: dealloc_return
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; CHECK: }
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; Function Attrs: nounwind
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define i32 @foo(i32 %x, i32 %y) #0 !dbg !4 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !9, metadata !14), !dbg !15
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tail call void @llvm.dbg.value(metadata i32 %y, i64 0, metadata !10, metadata !14), !dbg !16
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%add = add nsw i32 %x, 1, !dbg !17
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%add1 = add nsw i32 %y, 1, !dbg !18
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%call = tail call i32 @bar(i32 %add, i32 %add1) #3, !dbg !19
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%add2 = add nsw i32 %call, 1, !dbg !20
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ret i32 %add2, !dbg !21
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}
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declare i32 @bar(i32, i32) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv4" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv4" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!11, !12}
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!llvm.ident = !{!13}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (http://llvm.org/git/clang.git 15506a21305e212c406f980ed9b6b1bac785df56)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "cfi-late.c", directory: "/test")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !8)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7, !7, !7}
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !{!9, !10}
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!9 = !DILocalVariable(name: "x", arg: 1, scope: !4, file: !1, line: 3, type: !7)
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!10 = !DILocalVariable(name: "y", arg: 2, scope: !4, file: !1, line: 3, type: !7)
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!11 = !{i32 2, !"Dwarf Version", i32 4}
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!12 = !{i32 2, !"Debug Info Version", i32 3}
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!13 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git 15506a21305e212c406f980ed9b6b1bac785df56)"}
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!14 = !DIExpression()
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!15 = !DILocation(line: 3, column: 13, scope: !4)
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!16 = !DILocation(line: 3, column: 20, scope: !4)
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!17 = !DILocation(line: 4, column: 15, scope: !4)
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!18 = !DILocation(line: 4, column: 20, scope: !4)
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!19 = !DILocation(line: 4, column: 10, scope: !4)
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!20 = !DILocation(line: 4, column: 24, scope: !4)
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!21 = !DILocation(line: 4, column: 3, scope: !4)
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