1; REQUIRES: object-emission 2 3; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s 4 5; This isn't a very pretty test case - I imagine there might be other ways to 6; tickle the optimizers into producing the desired code, but I haven't found 7; them. 8 9; The issue is when a function is inlined into itself, the inlined argument 10; accidentally overwrote the concrete argument and was lost. 11 12; IR generated from the following source compiled with clang -g: 13; void fn1(void *); 14; void fn2(int, int, int, int); 15; void fn3(); 16; void fn8(); 17; struct C { 18; int b; 19; void m_fn2() { 20; fn8(); 21; if (b) fn2(0, 0, 0, 0); 22; fn3(); 23; } 24; }; 25; C *x; 26; inline void fn7() {} 27; void fn6() { 28; fn8(); 29; x->m_fn2(); 30; fn7(); 31; } 32; void fn3() { fn6(); } 33; void fn4() { x->m_fn2(); } 34; void fn5() { x->m_fn2(); } 35 36; The definition of C and declaration of C::m_fn2 37; CHECK: DW_TAG_structure_type 38; CHECK-NOT: {{DW_TAG|NULL}} 39; CHECK: DW_TAG_member 40; CHECK-NOT: {{DW_TAG|NULL}} 41; CHECK: DW_TAG_subprogram 42; CHECK-NOT: DW_TAG 43; CHECK: DW_AT_name {{.*}} "m_fn2" 44; CHECK-NOT: {{DW_TAG|NULL}} 45; CHECK: [[M_FN2_THIS_DECL:.*]]: DW_TAG_formal_parameter 46 47; The abstract definition of C::m_fn2 48; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram 49; CHECK-NOT: DW_TAG 50; CHECK: DW_AT_specification {{.*}} "_ZN1C5m_fn2Ev" 51; CHECK-NOT: DW_TAG 52; CHECK: DW_AT_inline 53; CHECK-NOT: {{DW_TAG|NULL}} 54; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]: DW_TAG_formal_parameter 55; CHECK-NOT: DW_TAG 56; CHECK: DW_AT_name {{.*}} "this" 57 58; Skip some other functions 59; CHECK: DW_TAG_subprogram 60; CHECK: DW_TAG_subprogram 61; CHECK: DW_TAG_subprogram 62 63; The concrete definition of C::m_fn2 64; CHECK: DW_TAG_subprogram 65; CHECK-NOT: DW_TAG 66; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]} "_ZN1C5m_fn2Ev" 67; CHECK-NOT: {{DW_TAG|NULL}} 68; CHECK: DW_TAG_formal_parameter 69; CHECK-NOT: DW_TAG 70; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]} 71; CHECK-NOT: {{DW_TAG|NULL}} 72; Inlined fn3: 73; CHECK: DW_TAG_inlined_subroutine 74; CHECK-NOT: {{DW_TAG|NULL}} 75; Inlined fn6: 76; CHECK: DW_TAG_inlined_subroutine 77; CHECK-NOT: {{DW_TAG|NULL}} 78; Inlined C::m_fn2: 79; CHECK: DW_TAG_inlined_subroutine 80; CHECK-NOT: DW_TAG 81; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]} "_ZN1C5m_fn2Ev" 82; CHECK-NOT: {{DW_TAG|NULL}} 83; CHECK: DW_TAG_formal_parameter 84; CHECK-NOT: DW_TAG 85; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]} 86 87 88 89%struct.C = type { i32 } 90 91@x = global %struct.C* null, align 8 92 93; Function Attrs: nounwind 94define void @_Z3fn6v() #0 { 95entry: 96 tail call void @_Z3fn8v() #3, !dbg !31 97 %0 = load %struct.C** @x, align 8, !dbg !32, !tbaa !33 98 tail call void @llvm.dbg.value(metadata %struct.C* %0, i64 0, metadata !37, metadata !{!"0x102"}) #3, !dbg !38 99 tail call void @_Z3fn8v() #3, !dbg !39 100 %b.i = getelementptr inbounds %struct.C* %0, i64 0, i32 0, !dbg !40 101 %1 = load i32* %b.i, align 4, !dbg !40, !tbaa !42 102 %tobool.i = icmp eq i32 %1, 0, !dbg !40 103 br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !40 104 105if.then.i: ; preds = %entry 106 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !45 107 br label %_ZN1C5m_fn2Ev.exit, !dbg !45 108 109_ZN1C5m_fn2Ev.exit: ; preds = %entry, %if.then.i 110 tail call void @_Z3fn3v() #3, !dbg !47 111 ret void, !dbg !48 112} 113 114declare void @_Z3fn8v() #1 115 116; Function Attrs: nounwind 117define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 { 118entry: 119 tail call void @llvm.dbg.value(metadata %struct.C* %this, i64 0, metadata !24, metadata !{!"0x102"}), !dbg !49 120 tail call void @_Z3fn8v() #3, !dbg !50 121 %b = getelementptr inbounds %struct.C* %this, i64 0, i32 0, !dbg !51 122 %0 = load i32* %b, align 4, !dbg !51, !tbaa !42 123 %tobool = icmp eq i32 %0, 0, !dbg !51 124 br i1 %tobool, label %if.end, label %if.then, !dbg !51 125 126if.then: ; preds = %entry 127 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !52 128 br label %if.end, !dbg !52 129 130if.end: ; preds = %entry, %if.then 131 tail call void @_Z3fn8v() #3, !dbg !53 132 %1 = load %struct.C** @x, align 8, !dbg !56, !tbaa !33 133 tail call void @llvm.dbg.value(metadata %struct.C* %1, i64 0, metadata !57, metadata !{!"0x102"}) #3, !dbg !58 134 tail call void @_Z3fn8v() #3, !dbg !59 135 %b.i.i = getelementptr inbounds %struct.C* %1, i64 0, i32 0, !dbg !60 136 %2 = load i32* %b.i.i, align 4, !dbg !60, !tbaa !42 137 %tobool.i.i = icmp eq i32 %2, 0, !dbg !60 138 br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !60 139 140if.then.i.i: ; preds = %if.end 141 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !61 142 br label %_Z3fn6v.exit, !dbg !61 143 144_Z3fn6v.exit: ; preds = %if.end, %if.then.i.i 145 tail call void @_Z3fn3v() #3, !dbg !62 146 ret void, !dbg !63 147} 148 149; Function Attrs: nounwind 150define void @_Z3fn3v() #0 { 151entry: 152 br label %tailrecurse 153 154tailrecurse: ; preds = %tailrecurse.backedge, %entry 155 tail call void @_Z3fn8v() #3, !dbg !64 156 %0 = load %struct.C** @x, align 8, !dbg !66, !tbaa !33 157 tail call void @llvm.dbg.value(metadata %struct.C* %0, i64 0, metadata !67, metadata !{!"0x102"}) #3, !dbg !68 158 tail call void @_Z3fn8v() #3, !dbg !69 159 %b.i.i = getelementptr inbounds %struct.C* %0, i64 0, i32 0, !dbg !70 160 %1 = load i32* %b.i.i, align 4, !dbg !70, !tbaa !42 161 %tobool.i.i = icmp eq i32 %1, 0, !dbg !70 162 br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !70 163 164tailrecurse.backedge: ; preds = %tailrecurse, %if.then.i.i 165 br label %tailrecurse 166 167if.then.i.i: ; preds = %tailrecurse 168 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !71 169 br label %tailrecurse.backedge, !dbg !71 170} 171 172; Function Attrs: nounwind 173define void @_Z3fn4v() #0 { 174entry: 175 %0 = load %struct.C** @x, align 8, !dbg !72, !tbaa !33 176 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !72 177 ret void, !dbg !72 178} 179 180; Function Attrs: nounwind 181define void @_Z3fn5v() #0 { 182entry: 183 %0 = load %struct.C** @x, align 8, !dbg !73, !tbaa !33 184 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !73 185 ret void, !dbg !73 186} 187 188declare void @_Z3fn2iiii(i32, i32, i32, i32) #1 189 190; Function Attrs: nounwind readnone 191declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 192 193attributes #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" } 194attributes #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" } 195attributes #2 = { nounwind readnone } 196attributes #3 = { nounwind } 197 198!llvm.dbg.cu = !{!0} 199!llvm.module.flags = !{!28, !29} 200!llvm.ident = !{!30} 201 202!0 = !{!"0x11\004\00clang version 3.6.0 \001\00\000\00\001", !1, !2, !3, !13, !26, !2} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce/<stdin>] [DW_LANG_C_plus_plus] 203!1 = !{!"<stdin>", !"/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce"} 204!2 = !{} 205!3 = !{!4} 206!4 = !{!"0x13\00C\005\0032\0032\000\000\000", !5, null, null, !6, null, null, !"_ZTS1C"} ; [ DW_TAG_structure_type ] [C] [line 5, size 32, align 32, offset 0] [def] [from ] 207!5 = !{!"recursive_inlining.cpp", !"/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce"} 208!6 = !{!7, !9} 209!7 = !{!"0xd\00b\006\0032\0032\000\000", !5, !"_ZTS1C", !8} ; [ DW_TAG_member ] [b] [line 6, size 32, align 32, offset 0] [from int] 210!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] 211!9 = !{!"0x2e\00m_fn2\00m_fn2\00_ZN1C5m_fn2Ev\007\000\000\000\006\00256\001\007", !5, !"_ZTS1C", !10, null, null, null, i32 0, null} ; [ DW_TAG_subprogram ] [line 7] [m_fn2] 212!10 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !11, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 213!11 = !{null, !12} 214!12 = !{!"0xf\00\000\0064\0064\000\001088", null, null, !"_ZTS1C"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS1C] 215!13 = !{!14, !18, !19, !20, !21, !22} 216!14 = !{!"0x2e\00fn6\00fn6\00_Z3fn6v\0015\000\001\000\006\00256\001\0015", !5, !15, !16, null, void ()* @_Z3fn6v, null, null, !2} ; [ DW_TAG_subprogram ] [line 15] [def] [fn6] 217!15 = !{!"0x29", !5} ; [ DW_TAG_file_type ] [/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce/recursive_inlining.cpp] 218!16 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !17, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 219!17 = !{null} 220!18 = !{!"0x2e\00fn3\00fn3\00_Z3fn3v\0020\000\001\000\006\00256\001\0020", !5, !15, !16, null, void ()* @_Z3fn3v, null, null, !2} ; [ DW_TAG_subprogram ] [line 20] [def] [fn3] 221!19 = !{!"0x2e\00fn4\00fn4\00_Z3fn4v\0021\000\001\000\006\00256\001\0021", !5, !15, !16, null, void ()* @_Z3fn4v, null, null, !2} ; [ DW_TAG_subprogram ] [line 21] [def] [fn4] 222!20 = !{!"0x2e\00fn5\00fn5\00_Z3fn5v\0022\000\001\000\006\00256\001\0022", !5, !15, !16, null, void ()* @_Z3fn5v, null, null, !2} ; [ DW_TAG_subprogram ] [line 22] [def] [fn5] 223!21 = !{!"0x2e\00fn7\00fn7\00_Z3fn7v\0014\000\001\000\006\00256\001\0014", !5, !15, !16, null, null, null, null, !2} ; [ DW_TAG_subprogram ] [line 14] [def] [fn7] 224!22 = !{!"0x2e\00m_fn2\00m_fn2\00_ZN1C5m_fn2Ev\007\000\001\000\006\00256\001\007", !5, !"_ZTS1C", !10, null, void (%struct.C*)* @_ZN1C5m_fn2Ev, null, !9, !23} ; [ DW_TAG_subprogram ] [line 7] [def] [m_fn2] 225!23 = !{!24} 226!24 = !{!"0x101\00this\0016777216\001088", !22, null, !25} ; [ DW_TAG_arg_variable ] [this] [line 0] 227!25 = !{!"0xf\00\000\0064\0064\000\000", null, null, !"_ZTS1C"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS1C] 228!26 = !{!27} 229!27 = !{!"0x34\00x\00x\00\0013\000\001", null, !15, !25, %struct.C** @x, null} ; [ DW_TAG_variable ] [x] [line 13] [def] 230!28 = !{i32 2, !"Dwarf Version", i32 4} 231!29 = !{i32 2, !"Debug Info Version", i32 2} 232!30 = !{!"clang version 3.6.0 "} 233!31 = !MDLocation(line: 16, scope: !14) 234!32 = !MDLocation(line: 17, scope: !14) 235!33 = !{!34, !34, i64 0} 236!34 = !{!"any pointer", !35, i64 0} 237!35 = !{!"omnipotent char", !36, i64 0} 238!36 = !{!"Simple C/C++ TBAA"} 239!37 = !{!"0x101\00this\0016777216\001088", !22, null, !25, !32} ; [ DW_TAG_arg_variable ] [this] [line 0] 240!38 = !MDLocation(line: 0, scope: !22, inlinedAt: !32) 241!39 = !MDLocation(line: 8, scope: !22, inlinedAt: !32) 242!40 = !MDLocation(line: 9, scope: !41, inlinedAt: !32) 243!41 = !{!"0xb\009\000\000", !5, !22} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce/recursive_inlining.cpp] 244!42 = !{!43, !44, i64 0} 245!43 = !{!"_ZTS1C", !44, i64 0} 246!44 = !{!"int", !35, i64 0} 247!45 = !MDLocation(line: 9, scope: !46, inlinedAt: !32) 248!46 = !{!"0xb\009\000\001", !5, !41} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce/recursive_inlining.cpp] 249!47 = !MDLocation(line: 10, scope: !22, inlinedAt: !32) 250!48 = !MDLocation(line: 19, scope: !14) 251!49 = !MDLocation(line: 0, scope: !22) 252!50 = !MDLocation(line: 8, scope: !22) 253!51 = !MDLocation(line: 9, scope: !41) 254!52 = !MDLocation(line: 9, scope: !46) 255!53 = !MDLocation(line: 16, scope: !14, inlinedAt: !54) 256!54 = !MDLocation(line: 20, scope: !18, inlinedAt: !55) 257!55 = !MDLocation(line: 10, scope: !22) 258!56 = !MDLocation(line: 17, scope: !14, inlinedAt: !54) 259!57 = !{!"0x101\00this\0016777216\001088", !22, null, !25, !56} ; [ DW_TAG_arg_variable ] [this] [line 0] 260!58 = !MDLocation(line: 0, scope: !22, inlinedAt: !56) 261!59 = !MDLocation(line: 8, scope: !22, inlinedAt: !56) 262!60 = !MDLocation(line: 9, scope: !41, inlinedAt: !56) 263!61 = !MDLocation(line: 9, scope: !46, inlinedAt: !56) 264!62 = !MDLocation(line: 10, scope: !22, inlinedAt: !56) 265!63 = !MDLocation(line: 11, scope: !22) 266!64 = !MDLocation(line: 16, scope: !14, inlinedAt: !65) 267!65 = !MDLocation(line: 20, scope: !18) 268!66 = !MDLocation(line: 17, scope: !14, inlinedAt: !65) 269!67 = !{!"0x101\00this\0016777216\001088", !22, null, !25, !66} ; [ DW_TAG_arg_variable ] [this] [line 0] 270!68 = !MDLocation(line: 0, scope: !22, inlinedAt: !66) 271!69 = !MDLocation(line: 8, scope: !22, inlinedAt: !66) 272!70 = !MDLocation(line: 9, scope: !41, inlinedAt: !66) 273!71 = !MDLocation(line: 9, scope: !46, inlinedAt: !66) 274!72 = !MDLocation(line: 21, scope: !19) 275!73 = !MDLocation(line: 22, scope: !20) 276