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1; RUN: llc -march=x86-64 -mtriple=x86_64-linux < %s | FileCheck %s
2; RUN: opt -strip-debug < %s | llc -march=x86-64 -mtriple=x86_64-linux | FileCheck %s
3; http://llvm.org/PR19051. Minor code-motion difference with -g.
4; Presence of debug info shouldn't affect the codegen. Make sure that
5; we generated the same code sequence with and without debug info.
6;
7; CHECK:      callq   _Z3fooPcjPKc
8; CHECK:      callq   _Z3fooPcjPKc
9; CHECK:      leaq    (%rsp), %rdi
10; CHECK:      movl    $4, %esi
11; CHECK:      testl   {{%[a-z]+}}, {{%[a-z]+}}
12; CHECK:      je     .LBB0_4
13
14; Regenerate test with this command:
15;   clang -emit-llvm -S -O2 -g
16; from this source:
17;
18; extern void foo(char *dst,unsigned siz,const char *src);
19; extern const char * i2str(int);
20;
21; struct AAA3 {
22;  AAA3(const char *value) { foo(text,sizeof(text),value);}
23;  void operator=(const char *value) { foo(text,sizeof(text),value);}
24;  operator const char*() const { return text;}
25;  char text[4];
26; };
27;
28; void bar (int param1,int param2)  {
29;   const char * temp(0);
30;
31;   if (param2) {
32;     temp = i2str(param2);
33;   }
34;   AAA3 var1("");
35;   AAA3 var2("");
36;
37;   if (param1)
38;     var2 = "+";
39;   else
40;     var2 = "-";
41;   var1 = "";
42; }
43
44%struct.AAA3 = type { [4 x i8] }
45
46@.str = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
47@.str1 = private unnamed_addr constant [2 x i8] c"+\00", align 1
48@.str2 = private unnamed_addr constant [2 x i8] c"-\00", align 1
49
50; Function Attrs: uwtable
51define void @_Z3barii(i32 %param1, i32 %param2) #0 {
52entry:
53  %var1 = alloca %struct.AAA3, align 1
54  %var2 = alloca %struct.AAA3, align 1
55  tail call void @llvm.dbg.value(metadata !{i32 %param1}, i64 0, metadata !30), !dbg !47
56  tail call void @llvm.dbg.value(metadata !{i32 %param2}, i64 0, metadata !31), !dbg !47
57  tail call void @llvm.dbg.value(metadata !48, i64 0, metadata !32), !dbg !49
58  %tobool = icmp eq i32 %param2, 0, !dbg !50
59  br i1 %tobool, label %if.end, label %if.then, !dbg !50
60
61if.then:                                          ; preds = %entry
62  %call = tail call i8* @_Z5i2stri(i32 %param2), !dbg !52
63  tail call void @llvm.dbg.value(metadata !{i8* %call}, i64 0, metadata !32), !dbg !49
64  br label %if.end, !dbg !54
65
66if.end:                                           ; preds = %entry, %if.then
67  tail call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !33), !dbg !55
68  tail call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !56), !dbg !57
69  tail call void @llvm.dbg.value(metadata !58, i64 0, metadata !59), !dbg !60
70  %arraydecay.i = getelementptr inbounds %struct.AAA3* %var1, i64 0, i32 0, i64 0, !dbg !61
71  call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !61
72  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !34), !dbg !63
73  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !64), !dbg !65
74  call void @llvm.dbg.value(metadata !58, i64 0, metadata !66), !dbg !67
75  %arraydecay.i5 = getelementptr inbounds %struct.AAA3* %var2, i64 0, i32 0, i64 0, !dbg !68
76  call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !68
77  %tobool1 = icmp eq i32 %param1, 0, !dbg !69
78  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !34), !dbg !63
79  br i1 %tobool1, label %if.else, label %if.then2, !dbg !69
80
81if.then2:                                         ; preds = %if.end
82  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !71), !dbg !73
83  call void @llvm.dbg.value(metadata !74, i64 0, metadata !75), !dbg !76
84  call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)), !dbg !76
85  br label %if.end3, !dbg !72
86
87if.else:                                          ; preds = %if.end
88  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !77), !dbg !79
89  call void @llvm.dbg.value(metadata !80, i64 0, metadata !81), !dbg !82
90  call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)), !dbg !82
91  br label %if.end3
92
93if.end3:                                          ; preds = %if.else, %if.then2
94  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !33), !dbg !55
95  call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !83), !dbg !85
96  call void @llvm.dbg.value(metadata !58, i64 0, metadata !86), !dbg !87
97  call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !87
98  ret void, !dbg !88
99}
100
101declare i8* @_Z5i2stri(i32) #1
102
103declare void @_Z3fooPcjPKc(i8*, i32, i8*) #1
104
105; Function Attrs: nounwind readnone
106declare void @llvm.dbg.value(metadata, i64, metadata) #2
107
108attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
109attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
110attributes #2 = { nounwind readnone }
111
112!llvm.dbg.cu = !{!0}
113!llvm.module.flags = !{!44, !45}
114!llvm.ident = !{!46}
115
116!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 true, metadata !"", i32 0, metadata !2, metadata !3, metadata !23, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp] [DW_LANG_C_plus_plus]
117!1 = metadata !{metadata !"dbg-changes-codegen-branch-folding.cpp", metadata !"/tmp/dbginfo"}
118!2 = metadata !{}
119!3 = metadata !{metadata !4}
120!4 = metadata !{i32 786451, metadata !1, null, metadata !"AAA3", i32 4, i64 32, i64 8, i32 0, i32 0, null, metadata !5, i32 0, null, null, metadata !"_ZTS4AAA3"} ; [ DW_TAG_structure_type ] [AAA3] [line 4, size 32, align 8, offset 0] [def] [from ]
121!5 = metadata !{metadata !6, metadata !11, metadata !17, metadata !18}
122!6 = metadata !{i32 786445, metadata !1, metadata !"_ZTS4AAA3", metadata !"text", i32 8, i64 32, i64 8, i64 0, i32 0, metadata !7} ; [ DW_TAG_member ] [text] [line 8, size 32, align 8, offset 0] [from ]
123!7 = metadata !{i32 786433, null, null, metadata !"", i32 0, i64 32, i64 8, i32 0, i32 0, metadata !8, metadata !9, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 32, align 8, offset 0] [from char]
124!8 = metadata !{i32 786468, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ] [char] [line 0, size 8, align 8, offset 0, enc DW_ATE_signed_char]
125!9 = metadata !{metadata !10}
126!10 = metadata !{i32 786465, i64 0, i64 4}        ; [ DW_TAG_subrange_type ] [0, 3]
127!11 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"AAA3", metadata !"AAA3", metadata !"", i32 5, metadata !12, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 5} ; [ DW_TAG_subprogram ] [line 5] [AAA3]
128!12 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
129!13 = metadata !{null, metadata !14, metadata !15}
130!14 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !"_ZTS4AAA3"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS4AAA3]
131!15 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !16} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
132!16 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !8} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from char]
133!17 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"operator=", metadata !"operator=", metadata !"_ZN4AAA3aSEPKc", i32 6, metadata !12, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 6} ; [ DW_TAG_subprogram ] [line 6] [operator=]
134!18 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"operator const char *", metadata !"operator const char *", metadata !"_ZNK4AAA3cvPKcEv", i32 7, metadata !19, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 7} ; [ DW_TAG_subprogram ] [line 7] [operator const char *]
135!19 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !20, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
136!20 = metadata !{metadata !15, metadata !21}
137!21 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !22} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from ]
138!22 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !"_ZTS4AAA3"} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from _ZTS4AAA3]
139!23 = metadata !{metadata !24, metadata !35, metadata !40}
140!24 = metadata !{i32 786478, metadata !1, metadata !25, metadata !"bar", metadata !"bar", metadata !"_Z3barii", i32 11, metadata !26, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i32, i32)* @_Z3barii, null, null, metadata !29, i32 11} ; [ DW_TAG_subprogram ] [line 11] [def] [bar]
141!25 = metadata !{i32 786473, metadata !1}         ; [ DW_TAG_file_type ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
142!26 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !27, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
143!27 = metadata !{null, metadata !28, metadata !28}
144!28 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
145!29 = metadata !{metadata !30, metadata !31, metadata !32, metadata !33, metadata !34}
146!30 = metadata !{i32 786689, metadata !24, metadata !"param1", metadata !25, i32 16777227, metadata !28, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [param1] [line 11]
147!31 = metadata !{i32 786689, metadata !24, metadata !"param2", metadata !25, i32 33554443, metadata !28, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [param2] [line 11]
148!32 = metadata !{i32 786688, metadata !24, metadata !"temp", metadata !25, i32 12, metadata !15, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [temp] [line 12]
149!33 = metadata !{i32 786688, metadata !24, metadata !"var1", metadata !25, i32 17, metadata !"_ZTS4AAA3", i32 0, i32 0} ; [ DW_TAG_auto_variable ] [var1] [line 17]
150!34 = metadata !{i32 786688, metadata !24, metadata !"var2", metadata !25, i32 18, metadata !"_ZTS4AAA3", i32 0, i32 0} ; [ DW_TAG_auto_variable ] [var2] [line 18]
151!35 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"operator=", metadata !"operator=", metadata !"_ZN4AAA3aSEPKc", i32 6, metadata !12, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, metadata !17, metadata !36, i32 6} ; [ DW_TAG_subprogram ] [line 6] [def] [operator=]
152!36 = metadata !{metadata !37, metadata !39}
153!37 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 0]
154!38 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !"_ZTS4AAA3"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS4AAA3]
155!39 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [value] [line 6]
156!40 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"AAA3", metadata !"AAA3", metadata !"_ZN4AAA3C2EPKc", i32 5, metadata !12, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, metadata !11, metadata !41, i32 5} ; [ DW_TAG_subprogram ] [line 5] [def] [AAA3]
157!41 = metadata !{metadata !42, metadata !43}
158!42 = metadata !{i32 786689, metadata !40, metadata !"this", null, i32 16777216, metadata !38, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 0]
159!43 = metadata !{i32 786689, metadata !40, metadata !"value", metadata !25, i32 33554437, metadata !15, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [value] [line 5]
160!44 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
161!45 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
162!46 = metadata !{metadata !"clang version 3.5.0 "}
163!47 = metadata !{i32 11, i32 0, metadata !24, null}
164!48 = metadata !{i8* null}
165!49 = metadata !{i32 12, i32 0, metadata !24, null}
166!50 = metadata !{i32 14, i32 0, metadata !51, null}
167!51 = metadata !{i32 786443, metadata !1, metadata !24, i32 14, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
168!52 = metadata !{i32 15, i32 0, metadata !53, null}
169!53 = metadata !{i32 786443, metadata !1, metadata !51, i32 14, i32 0, i32 0, i32 1} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
170!54 = metadata !{i32 16, i32 0, metadata !53, null}
171!55 = metadata !{i32 17, i32 0, metadata !24, null}
172!56 = metadata !{i32 786689, metadata !40, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !55} ; [ DW_TAG_arg_variable ] [this] [line 0]
173!57 = metadata !{i32 0, i32 0, metadata !40, metadata !55}
174!58 = metadata !{i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)}
175!59 = metadata !{i32 786689, metadata !40, metadata !"value", metadata !25, i32 33554437, metadata !15, i32 0, metadata !55} ; [ DW_TAG_arg_variable ] [value] [line 5]
176!60 = metadata !{i32 5, i32 0, metadata !40, metadata !55}
177!61 = metadata !{i32 5, i32 0, metadata !62, metadata !55}
178!62 = metadata !{i32 786443, metadata !1, metadata !40, i32 5, i32 0, i32 0, i32 3} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
179!63 = metadata !{i32 18, i32 0, metadata !24, null}
180!64 = metadata !{i32 786689, metadata !40, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !63} ; [ DW_TAG_arg_variable ] [this] [line 0]
181!65 = metadata !{i32 0, i32 0, metadata !40, metadata !63}
182!66 = metadata !{i32 786689, metadata !40, metadata !"value", metadata !25, i32 33554437, metadata !15, i32 0, metadata !63} ; [ DW_TAG_arg_variable ] [value] [line 5]
183!67 = metadata !{i32 5, i32 0, metadata !40, metadata !63}
184!68 = metadata !{i32 5, i32 0, metadata !62, metadata !63}
185!69 = metadata !{i32 20, i32 0, metadata !70, null}
186!70 = metadata !{i32 786443, metadata !1, metadata !24, i32 20, i32 0, i32 0, i32 2} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
187!71 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !72} ; [ DW_TAG_arg_variable ] [this] [line 0]
188!72 = metadata !{i32 21, i32 0, metadata !70, null}
189!73 = metadata !{i32 0, i32 0, metadata !35, metadata !72}
190!74 = metadata !{i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)}
191!75 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, metadata !72} ; [ DW_TAG_arg_variable ] [value] [line 6]
192!76 = metadata !{i32 6, i32 0, metadata !35, metadata !72}
193!77 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !78} ; [ DW_TAG_arg_variable ] [this] [line 0]
194!78 = metadata !{i32 23, i32 0, metadata !70, null}
195!79 = metadata !{i32 0, i32 0, metadata !35, metadata !78}
196!80 = metadata !{i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)}
197!81 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, metadata !78} ; [ DW_TAG_arg_variable ] [value] [line 6]
198!82 = metadata !{i32 6, i32 0, metadata !35, metadata !78}
199!83 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !84} ; [ DW_TAG_arg_variable ] [this] [line 0]
200!84 = metadata !{i32 24, i32 0, metadata !24, null}
201!85 = metadata !{i32 0, i32 0, metadata !35, metadata !84}
202!86 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, metadata !84} ; [ DW_TAG_arg_variable ] [value] [line 6]
203!87 = metadata !{i32 6, i32 0, metadata !35, metadata !84}
204!88 = metadata !{i32 25, i32 0, metadata !24, null}
205