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7d6813a6c8
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
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 %ecx, 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 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 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, variables: !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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