1; RUN: opt -S < %s -mem2reg -verify | FileCheck %s 2 3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4target triple = "x86_64-apple-macosx10.13.0" 5 6; Original source (with some whitespace removed): 7; 8; extern int *getp(); 9; extern int cond(); 10; int get1() { return *getp(); } 11; int get2(int *p) { return *p; } 12; int bug(int *p) { 13; if (cond()) return get1(); 14; else return get2(p); 15; } 16 17define i32 @get1() !dbg !8 { 18 %1 = call i32* (...) @getp(), !dbg !12 19 %2 = load i32, i32* %1, align 4, !dbg !13 20 ret i32 %2, !dbg !14 21} 22 23declare i32* @getp(...) 24 25define i32 @get2(i32*) !dbg !15 { 26 %2 = alloca i32*, align 8 27 store i32* %0, i32** %2, align 8 28 call void @llvm.dbg.declare(metadata i32** %2, metadata !19, metadata !DIExpression()), !dbg !20 29 %3 = load i32*, i32** %2, align 8, !dbg !21 30 %4 = load i32, i32* %3, align 4, !dbg !22 31 ret i32 %4, !dbg !23 32} 33 34declare void @llvm.dbg.declare(metadata, metadata, metadata) 35 36; CHECK-LABEL: define i32 @bug 37define i32 @bug(i32*) !dbg !24 { 38 %2 = alloca i32, align 4 39 %3 = alloca i32*, align 8 40 store i32* %0, i32** %3, align 8 41 call void @llvm.dbg.declare(metadata i32** %3, metadata !25, metadata !DIExpression()), !dbg !26 42 %4 = call i32 (...) @cond(), !dbg !27 43 %5 = icmp ne i32 %4, 0, !dbg !27 44 br i1 %5, label %6, label %8, !dbg !29 45 46; <label>:6: ; preds = %1 47 %7 = call i32 @get1(), !dbg !30 48 store i32 %7, i32* %2, align 4, !dbg !31 49 br label %11, !dbg !31 50 51; <label>:8: ; preds = %1 52 %9 = load i32*, i32** %3, align 8, !dbg !32 53 %10 = call i32 @get2(i32* %9), !dbg !33 54 store i32 %10, i32* %2, align 4, !dbg !34 55 br label %11, !dbg !34 56 57; <label>:11: ; preds = %8, %6 58 %12 = load i32, i32* %2, align 4, !dbg !35 59 ret i32 %12, !dbg !35 60 61 ; CHECK: [[phi:%.*]] = phi i32 [ {{.*}} ], [ {{.*}} ], !dbg [[mergedLoc:![0-9]+]] 62 ; CHECK-NEXT: ret i32 [[phi]], !dbg [[retLoc:![0-9]+]] 63} 64 65; CHECK: [[commonScope:![0-9]+]] = distinct !DILexicalBlock(scope: {{.*}}, file: !1, line: 15, column: 7) 66; CHECK: [[mergedLoc]] = !DILocation(line: 0, scope: [[commonScope]]) 67; CHECK: [[retLoc]] = !DILocation(line: 23, column: 1 68 69declare i32 @cond(...) 70 71!llvm.dbg.cu = !{!0} 72!llvm.module.flags = !{!3, !4, !5, !6} 73!llvm.ident = !{!7} 74 75!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "Apple LLVM version 9.1.0 (clang-902.2.37.2)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 76!1 = !DIFile(filename: "bug.c", directory: "/bug") 77!2 = !{} 78!3 = !{i32 2, !"Dwarf Version", i32 4} 79!4 = !{i32 2, !"Debug Info Version", i32 3} 80!5 = !{i32 1, !"wchar_size", i32 4} 81!6 = !{i32 7, !"PIC Level", i32 2} 82!7 = !{!"Apple LLVM version 9.1.0 (clang-902.2.37.2)"} 83!8 = distinct !DISubprogram(name: "get1", scope: !1, file: !1, line: 6, type: !9, isLocal: false, isDefinition: true, scopeLine: 6, isOptimized: false, unit: !0, retainedNodes: !2) 84!9 = !DISubroutineType(types: !10) 85!10 = !{!11} 86!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 87!12 = !DILocation(line: 7, column: 11, scope: !8) 88!13 = !DILocation(line: 7, column: 10, scope: !8) 89!14 = !DILocation(line: 7, column: 3, scope: !8) 90!15 = distinct !DISubprogram(name: "get2", scope: !1, file: !1, line: 10, type: !16, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 91!16 = !DISubroutineType(types: !17) 92!17 = !{!11, !18} 93!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64) 94!19 = !DILocalVariable(name: "p", arg: 1, scope: !15, file: !1, line: 10, type: !18) 95!20 = !DILocation(line: 10, column: 15, scope: !15) 96!21 = !DILocation(line: 11, column: 11, scope: !15) 97!22 = !DILocation(line: 11, column: 10, scope: !15) 98!23 = !DILocation(line: 11, column: 3, scope: !15) 99!24 = distinct !DISubprogram(name: "bug", scope: !1, file: !1, line: 14, type: !16, isLocal: false, isDefinition: true, scopeLine: 14, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 100!25 = !DILocalVariable(name: "p", arg: 1, scope: !24, file: !1, line: 14, type: !18) 101!26 = !DILocation(line: 14, column: 14, scope: !24) 102!27 = !DILocation(line: 15, column: 7, scope: !28) 103!28 = distinct !DILexicalBlock(scope: !24, file: !1, line: 15, column: 7) 104!29 = !DILocation(line: 15, column: 7, scope: !24) 105!30 = !DILocation(line: 16, column: 12, scope: !28) 106!31 = !DILocation(line: 16, column: 5, scope: !28) 107!32 = !DILocation(line: 18, column: 17, scope: !28) 108!33 = !DILocation(line: 18, column: 12, scope: !28) 109!34 = !DILocation(line: 18, column: 5, scope: !28) 110!35 = !DILocation(line: 23, column: 1, scope: !24) 111