forked from OSchip/llvm-project
159 lines
6.6 KiB
LLVM
159 lines
6.6 KiB
LLVM
; RUN: llc -filetype=asm %s -o - | FileCheck %s
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; Test the extension of debug ranges from predecessors.
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; Generated from the source file LiveDebugValues.c:
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; #include <stdio.h>
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; int m;
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; extern int inc(int n);
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; extern int change(int n);
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; extern int modify(int n);
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; int main(int argc, char **argv) {
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; int n;
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; if (argc != 2)
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; n = 2;
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; else
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; n = atoi(argv[1]);
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; n = change(n);
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; if (n > 10) {
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; m = modify(n);
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; m = m + n; // var `m' doesn't has a dbg.value
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; }
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; else
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; m = inc(n); // var `m' doesn't has a dbg.value
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; printf("m(main): %d\n", m);
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; return 0;
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; }
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; with clang -g -O3 -emit-llvm -c LiveDebugValues.c -S -o live-debug-values.ll
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; This case will also produce multiple locations but only the debug range
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; extension is tested here.
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; DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.3
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; and %bb.4.
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; CHECK: .LBB0_5:
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; CHECK-NEXT: #DEBUG_VALUE: main:n <- $ebx
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; Other register values have been clobbered.
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; CHECK-NOT: #DEBUG_VALUE:
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; CHECK: movl %e{{..}}, m(%rip)
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; ModuleID = 'LiveDebugValues.c'
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source_filename = "test/DebugInfo/X86/live-debug-values.ll"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@m = common dso_local global i32 0, align 4, !dbg !0
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@.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1
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; Function Attrs: nounwind uwtable
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define dso_local i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !10 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %argc, metadata !17, metadata !20), !dbg !21
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tail call void @llvm.dbg.value(metadata i8** %argv, metadata !18, metadata !20), !dbg !22
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%cmp = icmp eq i32 %argc, 2, !dbg !24
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br i1 %cmp, label %if.else, label %if.end, !dbg !26
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if.else: ; preds = %entry
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%arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27
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%0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28
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%call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #1, !dbg !32
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tail call void @llvm.dbg.value(metadata i32 %call, metadata !19, metadata !20), !dbg !33
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br label %if.end
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if.end: ; preds = %if.else, %entry
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%n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ]
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%call1 = tail call i32 @change(i32 %n.0) #1, !dbg !34
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tail call void @llvm.dbg.value(metadata i32 %call1, metadata !19, metadata !20), !dbg !33
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%cmp2 = icmp sgt i32 %call1, 10, !dbg !35
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br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37
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if.then.3: ; preds = %if.end
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%call4 = tail call i32 @modify(i32 %call1) #1, !dbg !38
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%add = add nsw i32 %call4, %call1, !dbg !40
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br label %if.end.7, !dbg !41
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if.else.5: ; preds = %if.end
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%call6 = tail call i32 @inc(i32 %call1) #1, !dbg !42
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br label %if.end.7
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if.end.7: ; preds = %if.else.5, %if.then.3
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%storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ]
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store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44
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%call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #1, !dbg !46
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ret i32 0, !dbg !47
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}
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; Function Attrs: nounwind
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declare i32 @atoi(...) #1
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; Function Attrs: nounwind
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declare i32 @change(i32) #1
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; Function Attrs: nounwind
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declare i32 @modify(i32) #1
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; Function Attrs: nounwind
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declare i32 @inc(i32) #1
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; Function Attrs: nounwind
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declare i32 @printf(i8* nocapture readonly, ...) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind }
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attributes #2 = { nounwind readnone }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8}
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!llvm.ident = !{!9}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "m", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{!"clang version 3.8.0 (trunk 253049) "}
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!10 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 6, type: !11, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !16)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!6, !6, !13}
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!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64, align: 64)
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!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64, align: 64)
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!15 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!16 = !{!17, !18, !19}
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!17 = !DILocalVariable(name: "argc", arg: 1, scope: !10, file: !3, line: 6, type: !6)
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!18 = !DILocalVariable(name: "argv", arg: 2, scope: !10, file: !3, line: 6, type: !13)
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!19 = !DILocalVariable(name: "n", scope: !10, file: !3, line: 7, type: !6)
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!20 = !DIExpression()
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!21 = !DILocation(line: 6, column: 14, scope: !10)
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!22 = !DILocation(line: 6, column: 27, scope: !23)
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!23 = !DILexicalBlockFile(scope: !10, file: !3, discriminator: 1)
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!24 = !DILocation(line: 8, column: 12, scope: !25)
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!25 = distinct !DILexicalBlock(scope: !10, file: !3, line: 8, column: 7)
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!26 = !DILocation(line: 8, column: 7, scope: !10)
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!27 = !DILocation(line: 11, column: 14, scope: !25)
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!28 = !{!29, !29, i64 0}
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!29 = !{!"any pointer", !30, i64 0}
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!30 = !{!"omnipotent char", !31, i64 0}
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!31 = !{!"Simple C/C++ TBAA"}
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!32 = !DILocation(line: 11, column: 9, scope: !25)
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!33 = !DILocation(line: 7, column: 7, scope: !23)
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!34 = !DILocation(line: 12, column: 7, scope: !10)
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!35 = !DILocation(line: 13, column: 9, scope: !36)
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!36 = distinct !DILexicalBlock(scope: !10, file: !3, line: 13, column: 7)
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!37 = !DILocation(line: 13, column: 7, scope: !10)
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!38 = !DILocation(line: 14, column: 9, scope: !39)
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!39 = distinct !DILexicalBlock(scope: !36, file: !3, line: 13, column: 15)
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!40 = !DILocation(line: 15, column: 11, scope: !39)
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!41 = !DILocation(line: 16, column: 3, scope: !39)
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!42 = !DILocation(line: 18, column: 9, scope: !36)
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!43 = !DILocation(line: 15, column: 7, scope: !39)
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!44 = !{!45, !45, i64 0}
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!45 = !{!"int", !30, i64 0}
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!46 = !DILocation(line: 19, column: 3, scope: !10)
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!47 = !DILocation(line: 20, column: 3, scope: !10)
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