1 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 declare void @llvm.dbg.declare(metadata, metadata, metadata)
4 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
5 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
6 declare void @foo(i8* nocapture, i8* nocapture)
8 define void @bar(i1 %flag) #0 !dbg !4 {
11 ; CHECK: %[[T:[^ ]+]] = getelementptr inbounds [1 x i8], [1 x i8]* %text
12 ; CHECK: %[[B:[^ ]+]] = getelementptr inbounds [1 x i8], [1 x i8]* %buff
14 ; CHECK-NEXT: br label %bb2
16 ; CHECK-NEXT: br label %bb3
18 ; CHECK-NEXT: call void @llvm.dbg.declare
19 ; CHECK-NEXT: br label %fin
20 ; CHECK: call void @llvm.lifetime.start.p0i8(i64 1, i8* %[[T]])
21 ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* %[[B]])
22 ; CHECK-NEXT: call void @foo(i8* %[[B]], i8* %[[T]])
23 ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* %[[B]])
24 ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(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
32 call void @llvm.lifetime.start.p0i8(i64 1, i8* %0)
33 call void @llvm.lifetime.start.p0i8(i64 1, i8* %1)
34 call void @llvm.lifetime.end.p0i8(i64 1, i8* %1)
35 call void @llvm.lifetime.end.p0i8(i64 1, i8* %0)
39 call void @llvm.lifetime.start.p0i8(i64 1, i8* %0)
40 call void @llvm.lifetime.start.p0i8(i64 1, i8* %1)
41 call void @llvm.lifetime.end.p0i8(i64 1, i8* %0)
42 call void @llvm.lifetime.end.p0i8(i64 1, i8* %1)
46 call void @llvm.lifetime.start.p0i8(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.p0i8(i64 1, i8* %0)
52 call void @llvm.lifetime.start.p0i8(i64 1, i8* %0)
53 call void @llvm.lifetime.start.p0i8(i64 1, i8* %1)
54 call void @foo(i8* %1, i8* %0)
55 call void @llvm.lifetime.end.p0i8(i64 1, i8* %1)
56 call void @llvm.lifetime.end.p0i8(i64 1, i8* %0)
63 attributes #0 = { "null-pointer-is-valid"="true" }
66 !llvm.module.flags = !{!22, !23}
69 !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: FullDebug, enums: !2)
70 !1 = !DIFile(filename: "test.cpp", directory: "/home/user")
72 !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, unit: !0, retainedNodes: !8)
73 !5 = !DISubroutineType(types: !6)
75 !7 = !DIBasicType(name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean)
76 !8 = !{!9, !11, !12, !14, !21}
77 !9 = !DILocalVariable(name: "Size", arg: 1, scope: !4, file: !1, line: 2, type: !10)
78 !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
79 !11 = !DILocalVariable(name: "flag", arg: 2, scope: !4, file: !1, line: 2, type: !7)
80 !12 = !DILocalVariable(name: "i", scope: !13, file: !1, line: 3, type: !10)
81 !13 = distinct !DILexicalBlock(scope: !4, file: !1, line: 3, column: 3)
82 !14 = !DILocalVariable(name: "text", scope: !15, file: !1, line: 4, type: !17)
83 !15 = distinct !DILexicalBlock(scope: !16, file: !1, line: 3, column: 30)
84 !16 = distinct !DILexicalBlock(scope: !13, file: !1, line: 3, column: 3)
85 !17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, size: 8, align: 8, elements: !19)
86 !18 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
88 !20 = !DISubrange(count: 1)
89 !21 = !DILocalVariable(name: "buff", scope: !15, file: !1, line: 5, type: !17)
90 !22 = !{i32 2, !"Dwarf Version", i32 4}
91 !23 = !{i32 2, !"Debug Info Version", i32 3}
92 !24 = !{!"clang version 3.8.0 (trunk 248826) (llvm/trunk 248827)"}
94 !26 = !DILocation(line: 4, column: 10, scope: !15)