1; REQUIRES: object-emission
2
3; RUN: llc -mtriple=i386-linux-gnu -filetype=obj -relocation-model=pic %s -o /dev/null
4
5; Derived from the test case in PR20367, there's nothing really positive to
6; test here (hence no FileCheck, etc). All that was wrong is that the debug info
7; intrinsics (introduced by inlining) in 'f1' were causing codegen to crash, but
8; since 'f1' is a nodebug function, there's no positive outcome to confirm, just
9; that debug info doesn't get in the way/cause a crash.
10
11; The test case isn't particularly well reduced/tidy, but as simple as I could
12; get the C++ source. I assume the complexity is mostly just about producing a
13; certain amount of register pressure, so it might be able to be simplified/made
14; more uniform.
15
16; Generated from:
17; $ clang-tot -cc1 -triple i386 -emit-obj -g -O3 repro.cpp
18; void sink(const void *);
19; int source();
20; void f3(int);
21;
22; extern bool b;
23;
24; struct string {
25;   unsigned *mem;
26; };
27;
28; extern string &str;
29;
30; inline __attribute__((always_inline)) void s2(string *lhs) { sink(lhs->mem); }
31; inline __attribute__((always_inline)) void f() {
32;   string str2;
33;   s2(&str2);
34;   sink(&str2);
35; }
36; void __attribute__((nodebug)) f1() {
37;   for (int iter = 0; iter != 2; ++iter) {
38;     f();
39;     sink(str.mem);
40;     if (b) return;
41;   }
42; }
43
44%struct.string = type { i32* }
45
46@str = external constant %struct.string*
47@b = external global i8
48
49; Function Attrs: nounwind
50define void @_Z2f1v() #0 {
51entry:
52  %str2.i = alloca %struct.string, align 4
53  %0 = bitcast %struct.string* %str2.i to i8*, !dbg !26
54  %1 = load %struct.string** @str, align 4
55  %mem = getelementptr inbounds %struct.string* %1, i32 0, i32 0
56  br label %for.body
57
58for.body:                                         ; preds = %for.body, %entry
59  %iter.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
60  call void @llvm.lifetime.start(i64 4, i8* %0), !dbg !26
61  call void @llvm.dbg.value(metadata !{%struct.string* %str2.i}, i64 0, metadata !16) #3, !dbg !26
62  call void @llvm.dbg.value(metadata !{%struct.string* %str2.i}, i64 0, metadata !27) #3, !dbg !29
63  call void @_Z4sinkPKv(i8* undef) #3, !dbg !29
64  call void @_Z4sinkPKv(i8* %0) #3, !dbg !30
65  call void @llvm.lifetime.end(i64 4, i8* %0), !dbg !31
66  %2 = load i32** %mem, align 4, !tbaa !32
67  %3 = bitcast i32* %2 to i8*
68  call void @_Z4sinkPKv(i8* %3) #3
69  %4 = load i8* @b, align 1, !tbaa !37, !range !39
70  %tobool = icmp ne i8 %4, 0
71  %inc = add nsw i32 %iter.02, 1
72  %cmp = icmp eq i32 %inc, 2
73  %or.cond = or i1 %tobool, %cmp
74  br i1 %or.cond, label %for.end, label %for.body
75
76for.end:                                          ; preds = %for.body
77  ret void
78}
79
80declare void @_Z4sinkPKv(i8*) #1
81
82; Function Attrs: nounwind readnone
83declare void @llvm.dbg.value(metadata, i64, metadata) #2
84
85; Function Attrs: nounwind
86declare void @llvm.lifetime.start(i64, i8* nocapture) #3
87
88; Function Attrs: nounwind
89declare void @llvm.lifetime.end(i64, i8* nocapture) #3
90
91attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
92attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
93attributes #2 = { nounwind readnone }
94attributes #3 = { nounwind }
95
96!llvm.dbg.cu = !{!0}
97!llvm.module.flags = !{!23, !24}
98!llvm.ident = !{!25}
99
100!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 true, metadata !"", i32 0, metadata !2, metadata !3, metadata !10, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/<stdin>] [DW_LANG_C_plus_plus]
101!1 = metadata !{metadata !"<stdin>", metadata !"/tmp/dbginfo"}
102!2 = metadata !{}
103!3 = metadata !{metadata !4}
104!4 = metadata !{i32 786451, metadata !5, null, metadata !"string", i32 7, i64 32, i64 32, i32 0, i32 0, null, metadata !6, i32 0, null, null, metadata !"_ZTS6string"} ; [ DW_TAG_structure_type ] [string] [line 7, size 32, align 32, offset 0] [def] [from ]
105!5 = metadata !{metadata !"repro.cpp", metadata !"/tmp/dbginfo"}
106!6 = metadata !{metadata !7}
107!7 = metadata !{i32 786445, metadata !5, metadata !"_ZTS6string", metadata !"mem", i32 8, i64 32, i64 32, i64 0, i32 0, metadata !8} ; [ DW_TAG_member ] [mem] [line 8, size 32, align 32, offset 0] [from ]
108!8 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 32, i64 32, i64 0, i32 0, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from unsigned int]
109!9 = metadata !{i32 786468, null, null, metadata !"unsigned int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned]
110!10 = metadata !{metadata !11, metadata !17}
111!11 = metadata !{i32 786478, metadata !5, metadata !12, metadata !"f", metadata !"f", metadata !"_Z1fv", i32 14, metadata !13, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, null, metadata !15, i32 14} ; [ DW_TAG_subprogram ] [line 14] [def] [f]
112!12 = metadata !{i32 786473, metadata !5}         ; [ DW_TAG_file_type ] [/tmp/dbginfo/repro.cpp]
113!13 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !14, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
114!14 = metadata !{null}
115!15 = metadata !{metadata !16}
116!16 = metadata !{i32 786688, metadata !11, metadata !"str2", metadata !12, i32 15, metadata !"_ZTS6string", i32 0, i32 0} ; [ DW_TAG_auto_variable ] [str2] [line 15]
117!17 = metadata !{i32 786478, metadata !5, metadata !12, metadata !"s2", metadata !"s2", metadata !"_Z2s2P6string", i32 13, metadata !18, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, null, metadata !21, i32 13} ; [ DW_TAG_subprogram ] [line 13] [def] [s2]
118!18 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !19, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
119!19 = metadata !{null, metadata !20}
120!20 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 32, i64 32, i64 0, i32 0, metadata !"_ZTS6string"} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from _ZTS6string]
121!21 = metadata !{metadata !22}
122!22 = metadata !{i32 786689, metadata !17, metadata !"lhs", metadata !12, i32 16777229, metadata !20, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [lhs] [line 13]
123!23 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
124!24 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
125!25 = metadata !{metadata !"clang version 3.5.0 "}
126!26 = metadata !{i32 15, i32 0, metadata !11, null}
127!27 = metadata !{i32 786689, metadata !17, metadata !"lhs", metadata !12, i32 16777229, metadata !20, i32 0, metadata !28} ; [ DW_TAG_arg_variable ] [lhs] [line 13]
128!28 = metadata !{i32 16, i32 0, metadata !11, null}
129!29 = metadata !{i32 13, i32 0, metadata !17, metadata !28}
130!30 = metadata !{i32 17, i32 0, metadata !11, null}
131!31 = metadata !{i32 18, i32 0, metadata !11, null}
132!32 = metadata !{metadata !33, metadata !34, i64 0}
133!33 = metadata !{metadata !"_ZTS6string", metadata !34, i64 0}
134!34 = metadata !{metadata !"any pointer", metadata !35, i64 0}
135!35 = metadata !{metadata !"omnipotent char", metadata !36, i64 0}
136!36 = metadata !{metadata !"Simple C/C++ TBAA"}
137!37 = metadata !{metadata !38, metadata !38, i64 0}
138!38 = metadata !{metadata !"bool", metadata !35, i64 0}
139!39 = metadata !{i8 0, i8 2}
140