1; ModuleID = 'formal_parameter.c'
2target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
3target triple = "x86_64-apple-macosx10.9.0"
4;
5; From (clang -g -c -O1):
6;
7; int lookup(int* map);
8; int verify(int val);
9; void foo(int map)
10; {
11;   lookup(&map);
12;   if (!verify(map)) {  }
13; }
14;
15; RUN: opt %s -O2 -S -o %t
16; RUN: cat %t | FileCheck --check-prefix=LOWERING %s
17; RUN: llc -filetype=obj %t -o - | llvm-dwarfdump -debug-dump=info - | FileCheck %s
18; Test that we only emit only one DW_AT_formal_parameter "map" for this function.
19; rdar://problem/14874886
20;
21; CHECK: DW_TAG_formal_parameter
22; CHECK-NOT: DW_TAG
23; CHECK: DW_AT_name {{.*}}map
24; CHECK-NOT: DW_AT_name {{.*}}map
25
26; Function Attrs: nounwind ssp uwtable
27define void @foo(i32 %map) #0 !dbg !4 {
28entry:
29  %map.addr = alloca i32, align 4
30  store i32 %map, i32* %map.addr, align 4, !tbaa !15
31  call void @llvm.dbg.declare(metadata i32* %map.addr, metadata !10, metadata !DIExpression()), !dbg !14
32  %call = call i32 (i32*, ...) bitcast (i32 (...)* @lookup to i32 (i32*, ...)*)(i32* %map.addr) #3, !dbg !19
33  ; Ensure that all dbg intrinsics have the same scope after
34  ; LowerDbgDeclare is finished with them.
35  ;
36  ; LOWERING: call void @llvm.dbg.value{{.*}}, !dbg ![[LOC:.*]]
37  ; LOWERING: call void @llvm.dbg.value{{.*}}, !dbg ![[LOC]]
38  ; LOWERING: call void @llvm.dbg.value{{.*}}, !dbg ![[LOC]]
39%0 = load i32, i32* %map.addr, align 4, !dbg !20, !tbaa !15
40  %call1 = call i32 (i32, ...) bitcast (i32 (...)* @verify to i32 (i32, ...)*)(i32 %0) #3, !dbg !20
41  ret void, !dbg !22
42}
43
44; Function Attrs: nounwind readnone
45declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
46
47declare i32 @lookup(...)
48
49declare i32 @verify(...)
50
51; Function Attrs: nounwind readnone
52declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
53
54attributes #0 = { nounwind ssp uwtable }
55attributes #1 = { nounwind readnone }
56attributes #3 = { nounwind }
57
58!llvm.dbg.cu = !{!0}
59!llvm.module.flags = !{!11, !12}
60!llvm.ident = !{!13}
61
62!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
63!1 = !DIFile(filename: "formal_parameter.c", directory: "")
64!2 = !{}
65!4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, variables: !9)
66!5 = !DIFile(filename: "formal_parameter.c", directory: "")
67!6 = !DISubroutineType(types: !7)
68!7 = !{null, !8}
69!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
70!9 = !{!10}
71!10 = !DILocalVariable(name: "map", line: 1, arg: 1, scope: !4, file: !5, type: !8)
72!11 = !{i32 2, !"Dwarf Version", i32 2}
73!12 = !{i32 1, !"Debug Info Version", i32 3}
74!13 = !{!"clang version 3.5.0 "}
75!14 = !DILocation(line: 1, scope: !4)
76!15 = !{!16, !16, i64 0}
77!16 = !{!"int", !17, i64 0}
78!17 = !{!"omnipotent char", !18, i64 0}
79!18 = !{!"Simple C/C++ TBAA"}
80!19 = !DILocation(line: 3, scope: !4)
81!20 = !DILocation(line: 4, scope: !21)
82!21 = distinct !DILexicalBlock(line: 4, column: 0, file: !1, scope: !4)
83!22 = !DILocation(line: 5, scope: !4)
84