1; RUN: llc -O0 %s -mtriple=aarch64 -o - | FileCheck %s
2
3; Test that a DEBUG_VALUE node is create for variable c after the phi has been
4; converted to a ldr.    The DEBUG_VALUE must be *after* the ldr and not before it.
5
6; Created from the C code, compiled with -O0 -g and then passed through opt -mem2reg:
7;
8; int func(int a)
9; {
10;         int c = 1;
11;         if (a < 0 ) {
12;                 c = 12;
13;         }
14;         return c;
15; }
16;
17; Function Attrs: nounwind
18define i32 @func(i32) #0 !dbg !8 {
19  call void @llvm.dbg.value(metadata i32 %0, i64 0, metadata !12, metadata !13), !dbg !14
20  call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !15, metadata !13), !dbg !16
21  %2 = icmp slt i32 %0, 0, !dbg !17
22  br i1 %2, label %3, label %4, !dbg !19
23
24; <label>:3:                                      ; preds = %1
25  call void @llvm.dbg.value(metadata i32 12, i64 0, metadata !15, metadata !13), !dbg !16
26  br label %4, !dbg !20
27
28; <label>:4:                                      ; preds = %3, %1
29  %.0 = phi i32 [ 12, %3 ], [ 1, %1 ]
30; CHECK: ldr     w[[REG:[0-9]+]], [sp, #8]
31; CHECK-NEXT: .Ltmp
32  call void @llvm.dbg.value(metadata i32 %.0, i64 0, metadata !15, metadata !13), !dbg !16
33; CHECK-NEXT:  //DEBUG_VALUE: func:c <- $w[[REG]]
34  %5 = add nsw i32 %.0, %0, !dbg !22
35  call void @llvm.dbg.value(metadata i32 %5, i64 0, metadata !15, metadata !13), !dbg !16
36  ret i32 %5, !dbg !23
37}
38
39; Function Attrs: nounwind readnone
40declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
41
42; Function Attrs: nounwind readnone
43declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
44
45attributes #0 = { nounwind }
46attributes #1 = { nounwind readnone }
47
48!llvm.dbg.cu = !{!0}
49!llvm.module.flags = !{!3, !4, !5, !6}
50!llvm.ident = !{!7}
51
52!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
53!1 = !DIFile(filename: "a.c", directory: "/tmp")
54!2 = !{}
55!3 = !{i32 2, !"Dwarf Version", i32 4}
56!4 = !{i32 2, !"Debug Info Version", i32 3}
57!5 = !{i32 1, !"wchar_size", i32 4}
58!6 = !{i32 1, !"min_enum_size", i32 4}
59!7 = !{!"clang"}
60!8 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
61!9 = !DISubroutineType(types: !10)
62!10 = !{!11, !11}
63!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
64!12 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11)
65!13 = !DIExpression()
66!14 = !DILocation(line: 1, column: 14, scope: !8)
67!15 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 3, type: !11)
68!16 = !DILocation(line: 3, column: 13, scope: !8)
69!17 = !DILocation(line: 4, column: 15, scope: !18)
70!18 = distinct !DILexicalBlock(scope: !8, file: !1, line: 4, column: 13)
71!19 = !DILocation(line: 4, column: 13, scope: !8)
72!20 = !DILocation(line: 6, column: 9, scope: !21)
73!21 = distinct !DILexicalBlock(scope: !18, file: !1, line: 4, column: 21)
74!22 = !DILocation(line: 7, column: 4, scope: !8)
75!23 = !DILocation(line: 8, column: 9, scope: !8)
76