1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 3 declare void @llvm.dbg.declare(metadata, metadata, metadata) 4 declare void @llvm.lifetime.start(i64, i8* nocapture) 5 declare void @llvm.lifetime.end(i64, i8* nocapture) 6 declare void @foo(i8* nocapture, i8* nocapture) 7 8 define void @bar(i1 %flag) !dbg !4 { 9 entry: 10 ; CHECK-LABEL: @bar( 11 ; CHECK: %[[T:[^ ]+]] = getelementptr inbounds [1 x i8], [1 x i8]* %text 12 ; CHECK: %[[B:[^ ]+]] = getelementptr inbounds [1 x i8], [1 x i8]* %buff 13 ; CHECK: if: 14 ; CHECK-NEXT: br label %bb2 15 ; CHECK: bb2: 16 ; CHECK-NEXT: br label %bb3 17 ; CHECK: bb3: 18 ; CHECK-NEXT: call void @llvm.dbg.declare 19 ; CHECK-NEXT: br label %fin 20 ; CHECK: call void @llvm.lifetime.start(i64 1, i8* %[[T]]) 21 ; CHECK-NEXT: call void @llvm.lifetime.start(i64 1, i8* %[[B]]) 22 ; CHECK-NEXT: call void @foo(i8* %[[B]], i8* %[[T]]) 23 ; CHECK-NEXT: call void @llvm.lifetime.end(i64 1, i8* %[[B]]) 24 ; CHECK-NEXT: call void @llvm.lifetime.end(i64 1, i8* %[[T]]) 25 %text = alloca [1 x i8], align 1 26 %buff = alloca [1 x i8], align 1 27 %0 = getelementptr inbounds [1 x i8], [1 x i8]* %text, i64 0, i64 0 28 %1 = getelementptr inbounds [1 x i8], [1 x i8]* %buff, i64 0, i64 0 29 br i1 %flag, label %if, label %else 30 31 if: 32 call void @llvm.lifetime.start(i64 1, i8* %0) 33 call void @llvm.lifetime.start(i64 1, i8* %1) 34 call void @llvm.lifetime.end(i64 1, i8* %1) 35 call void @llvm.lifetime.end(i64 1, i8* %0) 36 br label %bb2 37 38 bb2: 39 call void @llvm.lifetime.start(i64 1, i8* %0) 40 call void @llvm.lifetime.start(i64 1, i8* %1) 41 call void @llvm.lifetime.end(i64 1, i8* %0) 42 call void @llvm.lifetime.end(i64 1, i8* %1) 43 br label %bb3 44 45 bb3: 46 call void @llvm.lifetime.start(i64 1, i8* %0) 47 call void @llvm.dbg.declare(metadata [1 x i8]* %text, metadata !14, metadata !25), !dbg !26 48 call void @llvm.lifetime.end(i64 1, i8* %0) 49 br label %fin 50 51 else: 52 call void @llvm.lifetime.start(i64 1, i8* %0) 53 call void @llvm.lifetime.start(i64 1, i8* %1) 54 call void @foo(i8* %1, i8* %0) 55 call void @llvm.lifetime.end(i64 1, i8* %1) 56 call void @llvm.lifetime.end(i64 1, i8* %0) 57 br label %fin 58 59 fin: 60 ret void 61 } 62 63 !llvm.dbg.cu = !{!0} 64 !llvm.module.flags = !{!22, !23} 65 !llvm.ident = !{!24} 66 67 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 248826) (llvm/trunk 248827)", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3) 68 !1 = !DIFile(filename: "test.cpp", directory: "/home/user") 69 !2 = !{} 70 !3 = !{!4} 71 !4 = distinct !DISubprogram(name: "bar", linkageName: "bar", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, variables: !8) 72 !5 = !DISubroutineType(types: !6) 73 !6 = !{null, !7} 74 !7 = !DIBasicType(name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 75 !8 = !{!9, !11, !12, !14, !21} 76 !9 = !DILocalVariable(name: "Size", arg: 1, scope: !4, file: !1, line: 2, type: !10) 77 !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 78 !11 = !DILocalVariable(name: "flag", arg: 2, scope: !4, file: !1, line: 2, type: !7) 79 !12 = !DILocalVariable(name: "i", scope: !13, file: !1, line: 3, type: !10) 80 !13 = distinct !DILexicalBlock(scope: !4, file: !1, line: 3, column: 3) 81 !14 = !DILocalVariable(name: "text", scope: !15, file: !1, line: 4, type: !17) 82 !15 = distinct !DILexicalBlock(scope: !16, file: !1, line: 3, column: 30) 83 !16 = distinct !DILexicalBlock(scope: !13, file: !1, line: 3, column: 3) 84 !17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, size: 8, align: 8, elements: !19) 85 !18 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 86 !19 = !{!20} 87 !20 = !DISubrange(count: 1) 88 !21 = !DILocalVariable(name: "buff", scope: !15, file: !1, line: 5, type: !17) 89 !22 = !{i32 2, !"Dwarf Version", i32 4} 90 !23 = !{i32 2, !"Debug Info Version", i32 3} 91 !24 = !{!"clang version 3.8.0 (trunk 248826) (llvm/trunk 248827)"} 92 !25 = !DIExpression() 93 !26 = !DILocation(line: 4, column: 10, scope: !15) 94
