1; RUN: opt -mem2reg -S < %s | FileCheck %s
2
3; ModuleID = 'newvars.c'
4source_filename = "newvars.c"
5target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
6target triple = "x86_64-pc-windows-msvc19.0.24215"
7
8; Function Attrs: nounwind uwtable
9define i32 @if_else(i32 %cond, i32 %a, i32 %b) !dbg !8 {
10entry:
11  %x = alloca i32, align 4
12  call void @llvm.dbg.addr(metadata i32* %x, metadata !16, metadata !DIExpression()), !dbg !26
13  store i32 %a, i32* %x, align 4, !dbg !26, !tbaa !17
14  %tobool = icmp ne i32 %cond, 0, !dbg !28
15  br i1 %tobool, label %if.then, label %if.else, !dbg !30
16
17if.then:                                          ; preds = %entry
18  store i32 0, i32* %x, align 4, !dbg !31, !tbaa !17
19  br label %if.end, !dbg !33
20
21if.else:                                          ; preds = %entry
22  store i32 %b, i32* %x, align 4, !dbg !36, !tbaa !17
23  br label %if.end
24
25if.end:                                           ; preds = %if.else, %if.then
26  %rv = load i32, i32* %x, align 4, !dbg !37, !tbaa !17
27  ret i32 %rv, !dbg !39
28}
29
30; CHECK-LABEL: define i32 @if_else({{.*}})
31; CHECK: entry:
32; CHECK-NOT:   alloca i32
33; CHECK:   call void @llvm.dbg.value(metadata i32 %a, metadata ![[X_LOCAL:[0-9]+]], metadata !DIExpression())
34; CHECK: if.then:                                          ; preds = %entry
35; CHECK:   call void @llvm.dbg.value(metadata i32 0, metadata ![[X_LOCAL]], metadata !DIExpression())
36; CHECK: if.else:                                          ; preds = %entry
37; CHECK:   call void @llvm.dbg.value(metadata i32 %b, metadata ![[X_LOCAL]], metadata !DIExpression())
38; CHECK: if.end:                                           ; preds = %if.else, %if.then
39; CHECK:   %[[PHI:[^ ]*]] = phi i32 [ 0, %if.then ], [ %b, %if.else ]
40; CHECK:   call void @llvm.dbg.value(metadata i32 %[[PHI]], metadata ![[X_LOCAL]], metadata !DIExpression())
41; CHECK:   ret i32
42
43; CHECK: ![[X_LOCAL]] = !DILocalVariable(name: "x", {{.*}})
44
45; Function Attrs: nounwind readnone speculatable
46declare void @llvm.dbg.declare(metadata, metadata, metadata)
47declare void @llvm.dbg.addr(metadata, metadata, metadata)
48
49!llvm.dbg.cu = !{!0}
50!llvm.module.flags = !{!3, !4, !5, !6}
51!llvm.ident = !{!7}
52
53!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
54!1 = !DIFile(filename: "newvars.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild")
55!2 = !{}
56!3 = !{i32 2, !"Dwarf Version", i32 4}
57!4 = !{i32 2, !"Debug Info Version", i32 3}
58!5 = !{i32 1, !"wchar_size", i32 2}
59!6 = !{i32 7, !"PIC Level", i32 2}
60!7 = !{!"clang version 6.0.0 "}
61!8 = distinct !DISubprogram(name: "if_else", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
62!9 = !DISubroutineType(types: !10)
63!10 = !{!11, !11, !11, !11}
64!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
65!12 = !{!13, !14, !15, !16}
66!13 = !DILocalVariable(name: "b", arg: 3, scope: !8, file: !1, line: 1, type: !11)
67!14 = !DILocalVariable(name: "a", arg: 2, scope: !8, file: !1, line: 1, type: !11)
68!15 = !DILocalVariable(name: "cond", arg: 1, scope: !8, file: !1, line: 1, type: !11)
69!16 = !DILocalVariable(name: "x", scope: !8, file: !1, line: 2, type: !11)
70!17 = !{!18, !18, i64 0}
71!18 = !{!"int", !19, i64 0}
72!19 = !{!"omnipotent char", !20, i64 0}
73!20 = !{!"Simple C/C++ TBAA"}
74!22 = !DILocation(line: 1, column: 34, scope: !8)
75!23 = !DILocation(line: 1, column: 27, scope: !8)
76!24 = !DILocation(line: 1, column: 17, scope: !8)
77!25 = !DILocation(line: 2, column: 3, scope: !8)
78!26 = !DILocation(line: 2, column: 7, scope: !8)
79!27 = !DILocation(line: 2, column: 11, scope: !8)
80!28 = !DILocation(line: 3, column: 7, scope: !29)
81!29 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7)
82!30 = !DILocation(line: 3, column: 7, scope: !8)
83!31 = !DILocation(line: 4, column: 7, scope: !32)
84!32 = distinct !DILexicalBlock(scope: !29, file: !1, line: 3, column: 13)
85!33 = !DILocation(line: 5, column: 3, scope: !32)
86!34 = !DILocation(line: 6, column: 9, scope: !35)
87!35 = distinct !DILexicalBlock(scope: !29, file: !1, line: 5, column: 10)
88!36 = !DILocation(line: 6, column: 7, scope: !35)
89!37 = !DILocation(line: 8, column: 10, scope: !8)
90!38 = !DILocation(line: 9, column: 1, scope: !8)
91!39 = !DILocation(line: 8, column: 3, scope: !8)
92