111 lines
4.6 KiB
LLVM
111 lines
4.6 KiB
LLVM
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; RUN: opt -S < %s -mem2reg -verify | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.13.0"
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; Original source (with some whitespace removed):
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;
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; extern int *getp();
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; extern int cond();
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; int get1() { return *getp(); }
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; int get2(int *p) { return *p; }
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; int bug(int *p) {
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; if (cond()) return get1();
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; else return get2(p);
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; }
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define i32 @get1() !dbg !8 {
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%1 = call i32* (...) @getp(), !dbg !12
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%2 = load i32, i32* %1, align 4, !dbg !13
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ret i32 %2, !dbg !14
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}
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declare i32* @getp(...)
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define i32 @get2(i32*) !dbg !15 {
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%2 = alloca i32*, align 8
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store i32* %0, i32** %2, align 8
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call void @llvm.dbg.declare(metadata i32** %2, metadata !19, metadata !DIExpression()), !dbg !20
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%3 = load i32*, i32** %2, align 8, !dbg !21
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%4 = load i32, i32* %3, align 4, !dbg !22
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ret i32 %4, !dbg !23
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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; CHECK-LABEL: define i32 @bug
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define i32 @bug(i32*) !dbg !24 {
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%2 = alloca i32, align 4
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%3 = alloca i32*, align 8
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store i32* %0, i32** %3, align 8
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call void @llvm.dbg.declare(metadata i32** %3, metadata !25, metadata !DIExpression()), !dbg !26
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%4 = call i32 (...) @cond(), !dbg !27
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%5 = icmp ne i32 %4, 0, !dbg !27
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br i1 %5, label %6, label %8, !dbg !29
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; <label>:6: ; preds = %1
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%7 = call i32 @get1(), !dbg !30
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store i32 %7, i32* %2, align 4, !dbg !31
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br label %11, !dbg !31
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; <label>:8: ; preds = %1
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%9 = load i32*, i32** %3, align 8, !dbg !32
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%10 = call i32 @get2(i32* %9), !dbg !33
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store i32 %10, i32* %2, align 4, !dbg !34
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br label %11, !dbg !34
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; <label>:11: ; preds = %8, %6
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%12 = load i32, i32* %2, align 4, !dbg !35
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ret i32 %12, !dbg !35
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; CHECK: [[phi:%.*]] = phi i32 [ {{.*}} ], [ {{.*}} ], !dbg [[mergedLoc:![0-9]+]]
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; CHECK-NEXT: ret i32 [[phi]], !dbg [[retLoc:![0-9]+]]
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}
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; CHECK: [[commonScope:![0-9]+]] = distinct !DILexicalBlock(scope: {{.*}}, file: !1, line: 15, column: 7)
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; CHECK: [[mergedLoc]] = !DILocation(line: 0, scope: [[commonScope]])
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; CHECK: [[retLoc]] = !DILocation(line: 23, column: 1
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declare i32 @cond(...)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!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)
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!1 = !DIFile(filename: "bug.c", directory: "/bug")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!"Apple LLVM version 9.1.0 (clang-902.2.37.2)"}
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!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)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !DILocation(line: 7, column: 11, scope: !8)
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!13 = !DILocation(line: 7, column: 10, scope: !8)
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!14 = !DILocation(line: 7, column: 3, scope: !8)
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!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)
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!16 = !DISubroutineType(types: !17)
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!17 = !{!11, !18}
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!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
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!19 = !DILocalVariable(name: "p", arg: 1, scope: !15, file: !1, line: 10, type: !18)
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!20 = !DILocation(line: 10, column: 15, scope: !15)
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!21 = !DILocation(line: 11, column: 11, scope: !15)
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!22 = !DILocation(line: 11, column: 10, scope: !15)
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!23 = !DILocation(line: 11, column: 3, scope: !15)
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!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)
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!25 = !DILocalVariable(name: "p", arg: 1, scope: !24, file: !1, line: 14, type: !18)
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!26 = !DILocation(line: 14, column: 14, scope: !24)
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!27 = !DILocation(line: 15, column: 7, scope: !28)
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!28 = distinct !DILexicalBlock(scope: !24, file: !1, line: 15, column: 7)
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!29 = !DILocation(line: 15, column: 7, scope: !24)
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!30 = !DILocation(line: 16, column: 12, scope: !28)
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!31 = !DILocation(line: 16, column: 5, scope: !28)
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!32 = !DILocation(line: 18, column: 17, scope: !28)
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!33 = !DILocation(line: 18, column: 12, scope: !28)
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!34 = !DILocation(line: 18, column: 5, scope: !28)
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!35 = !DILocation(line: 23, column: 1, scope: !24)
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