108 lines
4.4 KiB
LLVM
108 lines
4.4 KiB
LLVM
; RUN: opt < %s -gvn -S | FileCheck %s
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;
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; Produced at -O2 from:
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; int a, b;
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; void f1(int *p1) {
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; if (b)
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; a = 1;
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; if (a && *p1)
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; f4();
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; }
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; int f2(int);
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; void f3(void) {
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; a = f2(1);
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; f1(&a);
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; }
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source_filename = "test/DebugInfo/Generic/gvn.ll"
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-ios"
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@a = common global i32 0, align 4, !dbg !0
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@b = common global i32 0, align 4, !dbg !6
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; Function Attrs: nounwind
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define void @f3() #0 !dbg !12 {
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entry:
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; Verify that the call still has a debug location after GVN.
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; CHECK: %call = tail call i32 @f2(i32 1) #{{[0-9]}}, !dbg
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%call = tail call i32 @f2(i32 1) #0, !dbg !15
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store i32 %call, i32* @a, align 4, !dbg !15, !tbaa !24
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tail call void @llvm.dbg.value(metadata i32* @a, metadata !22, metadata !28) #0, !dbg !29
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%0 = load i32, i32* @b, align 4, !dbg !29, !tbaa !24
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%tobool.i = icmp eq i32 %0, 0, !dbg !29
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br i1 %tobool.i, label %if.end.i, label %land.lhs.true.i.thread, !dbg !30
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land.lhs.true.i.thread: ; preds = %entry
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store i32 1, i32* @a, align 4, !dbg !32, !tbaa !24
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br label %if.then.3.i, !dbg !33
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; This instruction has no debug location -- in this
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; particular case it was removed by a bug in SimplifyCFG.
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if.end.i: ; preds = %entry
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%.pr = load i32, i32* @a, align 4
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; GVN is supposed to replace the load of %.pr with a direct reference to %call.
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; CHECK: %tobool2.i = icmp eq i32 %call, 0, !dbg
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%tobool2.i = icmp eq i32 %.pr, 0, !dbg !34
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br i1 %tobool2.i, label %f1.exit, label %if.then.3.i, !dbg !34
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if.then.3.i: ; preds = %if.end.i, %land.lhs.true.i.thread
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%call.i = tail call i32 bitcast (i32 (...)* @f4 to i32 ()*)() #0, !dbg !35
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br label %f1.exit, !dbg !35
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f1.exit: ; preds = %if.then.3.i, %if.end.i
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ret void, !dbg !36
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}
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declare i32 @f2(i32)
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declare i32 @f4(...)
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!9, !10}
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!llvm.ident = !{!11}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 245562) (llvm/trunk 245569)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "test.c", directory: "/")
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!4 = !{}
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!5 = !{!0, !6}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !{i32 2, !"Dwarf Version", i32 2}
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!10 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = !{!"clang version 3.8.0 (trunk 245562) (llvm/trunk 245569)"}
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!12 = distinct !DISubprogram(name: "f3", scope: !3, file: !3, line: 9, type: !13, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !4)
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!13 = !DISubroutineType(types: !14)
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!14 = !{null}
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!15 = !DILocation(line: 5, scope: !16, inlinedAt: !23)
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!16 = distinct !DILexicalBlock(scope: !17, file: !3, line: 5)
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!17 = distinct !DISubprogram(name: "f1", scope: !3, file: !3, line: 2, type: !18, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !21)
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!18 = !DISubroutineType(types: !19)
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!19 = !{null, !20}
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!20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64)
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!21 = !{!22}
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!22 = !DILocalVariable(name: "p1", arg: 1, scope: !17, file: !3, line: 2, type: !20)
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!23 = distinct !DILocation(line: 11, scope: !12)
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!24 = !{!25, !25, i64 0}
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!25 = !{!"int", !26, i64 0}
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!26 = !{!"omnipotent char", !27, i64 0}
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!27 = !{!"Simple C/C++ TBAA"}
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!28 = !DIExpression()
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!29 = !DILocation(line: 2, scope: !17, inlinedAt: !23)
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!30 = !DILocation(line: 3, scope: !31, inlinedAt: !23)
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!31 = distinct !DILexicalBlock(scope: !17, file: !3, line: 3)
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!32 = !DILocation(line: 3, scope: !17, inlinedAt: !23)
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!33 = !DILocation(line: 4, scope: !31, inlinedAt: !23)
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!34 = !DILocation(line: 5, scope: !17, inlinedAt: !23)
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!35 = !DILocation(line: 6, scope: !16, inlinedAt: !23)
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!36 = !DILocation(line: 12, scope: !12)
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