1; RUN: llc -O1 -filetype=obj -o - %s | llvm-dwarfdump -debug-dump=all - | FileCheck %s
2; Generated with -O1 from:
3; int f1();
4; void f2(int*);
5; int f3(int);
6;
7; int foo() {
8;   int i = 3;
9;   f3(i);
10;   i = 7;
11;   i = f1();
12;   f2(&i);
13;   return 0;
14; }
15;
16; Test that we generate valid debug info for optimized code,
17; particularly variables that are described as constants and passed
18; by reference.
19; rdar://problem/14874886
20;
21; CHECK: .debug_info contents:
22; CHECK: DW_TAG_variable
23; CHECK-NOT: DW_TAG
24; CHECK:     DW_AT_location [DW_FORM_data4]	([[LOC:.*]])
25; CHECK-NOT: DW_TAG
26; CHECK: DW_AT_name{{.*}}"i"
27; CHECK: .debug_loc contents:
28; CHECK: [[LOC]]:
29;        consts 0x00000003
30; CHECK: Beginning address offset: 0x0000000000000{{.*}}
31; CHECK:    Ending address offset: [[C1:.*]]
32; CHECK:     Location description: 11 03
33;        consts 0x00000007
34; CHECK: Beginning address offset: [[C1]]
35; CHECK:    Ending address offset: [[C2:.*]]
36; CHECK:     Location description: 11 07
37;        rax, piece 0x00000004
38; CHECK: Beginning address offset: [[C2]]
39; CHECK:    Ending address offset: [[R1:.*]]
40; CHECK:     Location description: 50 93 04
41;         rdi+0
42; CHECK: Beginning address offset: [[R1]]
43; CHECK:    Ending address offset: [[R2:.*]]
44; CHECK:     Location description: 75 00
45;
46target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
47target triple = "x86_64-apple-macosx10.9.0"
48
49; Function Attrs: nounwind ssp uwtable
50define i32 @foo() #0 !dbg !4 {
51entry:
52  %i = alloca i32, align 4
53  call void @llvm.dbg.value(metadata i32 3, i64 0, metadata !10, metadata !DIExpression()), !dbg !15
54  %call = call i32 @f3(i32 3) #3, !dbg !16
55  call void @llvm.dbg.value(metadata i32 7, i64 0, metadata !10, metadata !DIExpression()), !dbg !18
56  %call1 = call i32 (...) @f1() #3, !dbg !19
57  call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !10, metadata !DIExpression()), !dbg !19
58  store i32 %call1, i32* %i, align 4, !dbg !19, !tbaa !20
59  call void @llvm.dbg.value(metadata i32* %i, i64 0, metadata !10, metadata !DIExpression(DW_OP_deref)), !dbg !24
60  call void @f2(i32* %i) #3, !dbg !24
61  ret i32 0, !dbg !25
62}
63
64declare i32 @f3(i32)
65
66declare i32 @f1(...)
67
68declare void @f2(i32*)
69
70; Function Attrs: nounwind readnone
71declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
72
73attributes #0 = { nounwind ssp uwtable }
74attributes #2 = { nounwind readnone }
75attributes #3 = { nounwind }
76
77!llvm.dbg.cu = !{!0}
78!llvm.module.flags = !{!11, !12}
79!llvm.ident = !{!13}
80
81!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)
82!1 = !DIFile(filename: "dbg-value-const-byref.c", directory: "")
83!2 = !{}
84!4 = distinct !DISubprogram(name: "foo", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !6, variables: !9)
85!5 = !DIFile(filename: "dbg-value-const-byref.c", directory: "")
86!6 = !DISubroutineType(types: !7)
87!7 = !{!8}
88!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
89!9 = !{!10}
90!10 = !DILocalVariable(name: "i", line: 6, scope: !4, file: !5, type: !8)
91!11 = !{i32 2, !"Dwarf Version", i32 2}
92!12 = !{i32 1, !"Debug Info Version", i32 3}
93!13 = !{!"clang version 3.5.0 "}
94!14 = !{i32 3}
95!15 = !DILocation(line: 6, scope: !4)
96!16 = !DILocation(line: 7, scope: !4)
97!17 = !{i32 7}
98!18 = !DILocation(line: 8, scope: !4)
99!19 = !DILocation(line: 9, scope: !4)
100!20 = !{!21, !21, i64 0}
101!21 = !{!"int", !22, i64 0}
102!22 = !{!"omnipotent char", !23, i64 0}
103!23 = !{!"Simple C/C++ TBAA"}
104!24 = !DILocation(line: 10, scope: !4)
105!25 = !DILocation(line: 11, scope: !4)
106