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1; RUN: opt -S < %s -passes='function(mem2reg),require<verify>' | FileCheck %s2 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 ptr (...) @getp(), !dbg !1219 %2 = load i32, ptr %1, align 4, !dbg !1320 ret i32 %2, !dbg !1421}22 23declare ptr @getp(...)24 25define i32 @get2(ptr) !dbg !15 {26 %2 = alloca ptr, align 827 store ptr %0, ptr %2, align 828 call void @llvm.dbg.declare(metadata ptr %2, metadata !19, metadata !DIExpression()), !dbg !2029 %3 = load ptr, ptr %2, align 8, !dbg !2130 %4 = load i32, ptr %3, align 4, !dbg !2231 ret i32 %4, !dbg !2332}33 34declare void @llvm.dbg.declare(metadata, metadata, metadata)35 36; CHECK-LABEL: define i32 @bug37define i32 @bug(ptr) !dbg !24 {38 %2 = alloca i32, align 439 %3 = alloca ptr, align 840 store ptr %0, ptr %3, align 841 call void @llvm.dbg.declare(metadata ptr %3, metadata !25, metadata !DIExpression()), !dbg !2642 %4 = call i32 (...) @cond(), !dbg !2743 %5 = icmp ne i32 %4, 0, !dbg !2744 br i1 %5, label %6, label %8, !dbg !2945 46; <label>:6: ; preds = %147 %7 = call i32 @get1(), !dbg !3048 store i32 %7, ptr %2, align 4, !dbg !3149 br label %11, !dbg !3150 51; <label>:8: ; preds = %152 %9 = load ptr, ptr %3, align 8, !dbg !3253 %10 = call i32 @get2(ptr %9), !dbg !3354 store i32 %10, ptr %2, align 4, !dbg !3455 br label %11, !dbg !3456 57; <label>:11: ; preds = %8, %658 %12 = load i32, ptr %2, align 4, !dbg !3559 ret i32 %12, !dbg !3560 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: 168 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