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https://github.com/RPCS3/llvm-mirror.git
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a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
116 lines
6.8 KiB
LLVM
116 lines
6.8 KiB
LLVM
; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu < %s
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; Verify that we no longer crash in VSX swap removal when debug values
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; are in the code stream.
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@php_intpow10.powers = external unnamed_addr constant [23 x double], align 8, !dbg !24
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; Function Attrs: nounwind
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define double @_php_math_round(double %value, i32 signext %places, i32 signext %mode) #0 !dbg !6 {
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entry:
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br i1 undef, label %if.then, label %if.else, !dbg !32
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if.then: ; preds = %entry
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%conv = sitofp i32 undef to double, !dbg !34
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br i1 undef, label %if.then.i, label %if.end.i, !dbg !36
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if.then.i: ; preds = %if.then
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%call.i = tail call double @pow(double 1.000000e+01, double undef) #3, !dbg !39
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br label %php_intpow10.exit, !dbg !41
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if.end.i: ; preds = %if.then
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%0 = load double, double* undef, align 8, !dbg !42, !tbaa !43
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br label %php_intpow10.exit, !dbg !47
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php_intpow10.exit: ; preds = %if.end.i, %if.then.i
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%retval.0.i = phi double [ %call.i, %if.then.i ], [ %0, %if.end.i ], !dbg !48
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tail call void @llvm.dbg.value(metadata double %retval.0.i, i64 0, metadata !15, metadata !49), !dbg !50
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%div = fdiv double %conv, %retval.0.i, !dbg !51
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br label %if.end.15, !dbg !52
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if.else: ; preds = %entry
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%mul = fmul double %value, undef, !dbg !53
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br label %if.end.15
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if.end.15: ; preds = %if.else, %php_intpow10.exit
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%tmp_value.1 = phi double [ %div, %php_intpow10.exit ], [ %mul, %if.else ]
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ret double %tmp_value.1, !dbg !57
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}
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declare signext i32 @php_intlog10abs(...) #1
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declare signext i32 @php_round_helper(...) #1
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; Function Attrs: nounwind
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declare double @pow(double, double) #0
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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"="ppc64le" "target-features"="+altivec,+bpermd,+crypto,+direct-move,+extdiv,+power8-vector,+vsx,-qpx" "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"="ppc64le" "target-features"="+altivec,+bpermd,+crypto,+direct-move,+extdiv,+power8-vector,+vsx,-qpx" "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 = !{!29, !30}
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!llvm.ident = !{!31}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (git://github.com/llvm-mirror/clang.git e0848b6353721eb1b278a5bbea257bbf6316251e) (git://github.com/llvm-mirror/llvm.git 8724a428dfd5e78d7865bb01783708e83f9ed128)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !23)
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!1 = !DIFile(filename: "testcase.i", directory: "/tmp/glibc.build")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
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!6 = distinct !DISubprogram(name: "_php_math_round", scope: !1, file: !1, line: 15, type: !7, isLocal: false, isDefinition: true, scopeLine: 16, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !10)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!4, !4, !9, !9}
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!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !{!11, !12, !13, !14, !15, !16, !17}
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!11 = !DILocalVariable(name: "value", arg: 1, scope: !6, file: !1, line: 15, type: !4)
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!12 = !DILocalVariable(name: "places", arg: 2, scope: !6, file: !1, line: 15, type: !9)
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!13 = !DILocalVariable(name: "mode", arg: 3, scope: !6, file: !1, line: 15, type: !9)
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!14 = !DILocalVariable(name: "f1", scope: !6, file: !1, line: 17, type: !4)
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!15 = !DILocalVariable(name: "f2", scope: !6, file: !1, line: 17, type: !4)
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!16 = !DILocalVariable(name: "tmp_value", scope: !6, file: !1, line: 18, type: !4)
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!17 = !DILocalVariable(name: "precision_places", scope: !6, file: !1, line: 19, type: !9)
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!18 = distinct !DISubprogram(name: "php_intpow10", scope: !1, file: !1, line: 1, type: !19, isLocal: true, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !21)
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!19 = !DISubroutineType(types: !20)
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!20 = !{!4, !9}
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!21 = !{!22}
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!22 = !DILocalVariable(name: "power", arg: 1, scope: !18, file: !1, line: 1, type: !9)
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!23 = !{!24}
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!24 = !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "powers", scope: !18, file: !1, line: 3, type: !25, isLocal: true, isDefinition: true), expr: !DIExpression())
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!25 = !DICompositeType(tag: DW_TAG_array_type, baseType: !26, size: 1472, align: 64, elements: !27)
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!26 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !4)
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!27 = !{!28}
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!28 = !DISubrange(count: 23)
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!29 = !{i32 2, !"Dwarf Version", i32 4}
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!30 = !{i32 2, !"Debug Info Version", i32 3}
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!31 = !{!"clang version 3.8.0 (git://github.com/llvm-mirror/clang.git e0848b6353721eb1b278a5bbea257bbf6316251e) (git://github.com/llvm-mirror/llvm.git 8724a428dfd5e78d7865bb01783708e83f9ed128)"}
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!32 = !DILocation(line: 21, column: 32, scope: !33)
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!33 = distinct !DILexicalBlock(scope: !6, file: !1, line: 21, column: 6)
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!34 = !DILocation(line: 22, column: 15, scope: !35)
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!35 = distinct !DILexicalBlock(scope: !33, file: !1, line: 21, column: 67)
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!36 = !DILocation(line: 8, column: 16, scope: !37, inlinedAt: !38)
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!37 = distinct !DILexicalBlock(scope: !18, file: !1, line: 8, column: 6)
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!38 = distinct !DILocation(line: 23, column: 8, scope: !35)
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!39 = !DILocation(line: 9, column: 10, scope: !40, inlinedAt: !38)
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!40 = distinct !DILexicalBlock(scope: !37, file: !1, line: 8, column: 31)
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!41 = !DILocation(line: 9, column: 3, scope: !40, inlinedAt: !38)
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!42 = !DILocation(line: 11, column: 9, scope: !18, inlinedAt: !38)
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!43 = !{!44, !44, i64 0}
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!44 = !{!"double", !45, i64 0}
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!45 = !{!"omnipotent char", !46, i64 0}
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!46 = !{!"Simple C/C++ TBAA"}
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!47 = !DILocation(line: 11, column: 2, scope: !18, inlinedAt: !38)
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!48 = !DILocation(line: 23, column: 8, scope: !35)
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!49 = !DIExpression()
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!50 = !DILocation(line: 17, column: 13, scope: !6)
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!51 = !DILocation(line: 24, column: 25, scope: !35)
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!52 = !DILocation(line: 25, column: 2, scope: !35)
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!53 = !DILocation(line: 27, column: 22, scope: !54)
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!54 = distinct !DILexicalBlock(scope: !55, file: !1, line: 26, column: 20)
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!55 = distinct !DILexicalBlock(scope: !56, file: !1, line: 26, column: 7)
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!56 = distinct !DILexicalBlock(scope: !33, file: !1, line: 25, column: 9)
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!57 = !DILocation(line: 32, column: 2, scope: !6)
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