1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s 4 5 ; The formal parameter 'b' for Function 'x' when inlined within 'a' is lost on 6 ; mips and powerpc64 (and on x86_64 at at least -O2). Presumably this is a 7 ; SelectionDAG issue (do mips/powerpc64 use FastISel?). 8 ; XFAIL: mips, powerpc64, s390x 9 10 ; Build from the following source with clang -O2. 11 12 ; The important details are that 'x's abstract definition is first built during 13 ; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's' 14 ; variable is optimized away. No abstract definition DIE for 's' is constructed. 15 ; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but 16 ; the abstract DIE isn't (since the abstract definition for 'b' is already 17 ; built). This results in 's' inlined in 'a' being emitted with its name, line, 18 ; file there, rather than referencing an abstract definition. 19 20 ; extern int t; 21 ; 22 ; void f(int); 23 ; 24 ; inline void x(bool b) { 25 ; if (b) { 26 ; int s = t; 27 ; f(s); 28 ; } 29 ; f(0); 30 ; } 31 ; 32 ; void b() { 33 ; x(false); 34 ; } 35 ; 36 ; void a(bool u) { 37 ; x(u); 38 ; } 39 40 ; CHECK: [[ABS_X:.*]]: DW_TAG_subprogram 41 ; CHECK-NOT: DW_TAG 42 ; CHECK: DW_AT_name {{.*}} "x" 43 ; CHECK-NOT: {{DW_TAG|NULL}} 44 ; CHECK: [[ABS_B:.*]]: DW_TAG_formal_parameter 45 ; CHECK-NOT: DW_TAG 46 ; CHECK: DW_AT_name {{.*}} "b" 47 ; CHECK-NOT: {{DW_TAG|NULL}} 48 ; CHECK: DW_TAG_lexical_block 49 ; CHECK-NOT: {{DW_TAG|NULL}} 50 ; CHECK: DW_TAG_lexical_block 51 ; CHECK-NOT: {{DW_TAG|NULL}} 52 ; CHECK: [[ABS_S:.*]]: DW_TAG_variable 53 ; CHECK-NOT: DW_TAG 54 ; CHECK: DW_AT_name {{.*}} "s" 55 56 ; CHECK: DW_TAG_subprogram 57 ; CHECK-NOT: DW_TAG 58 ; CHECK: DW_AT_name {{.*}} "b" 59 ; CHECK-NOT: {{DW_TAG|NULL}} 60 ; CHECK: DW_TAG_inlined_subroutine 61 ; CHECK-NOT: DW_TAG 62 ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_X]]} 63 ; CHECK-NOT: {{DW_TAG|NULL}} 64 ; CHECK: DW_TAG_formal_parameter 65 ; CHECK-NOT: DW_TAG 66 ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_B]]} 67 ; Notice 'x's local variable 's' is missing. Not necessarily a bug here, 68 ; since it's been optimized entirely away and it should be described in 69 ; abstract subprogram. 70 ; CHECK-NOT: DW_TAG 71 ; CHECK: NULL 72 ; CHECK-NOT: DW_TAG 73 ; CHECK: NULL 74 75 ; CHECK: DW_TAG_subprogram 76 ; CHECK-NOT: DW_TAG 77 ; CHECK: DW_AT_name {{.*}} "a" 78 ; CHECK-NOT: {{DW_TAG|NULL}} 79 ; CHECK: DW_TAG_formal_parameter 80 ; CHECK-NOT: {{DW_TAG|NULL}} 81 ; CHECK: DW_TAG_inlined_subroutine 82 ; CHECK-NOT: DW_TAG 83 ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_X]]} 84 ; CHECK-NOT: {{DW_TAG|NULL}} 85 ; FIXME: This formal parameter goes missing at least at -O2 (& on 86 ; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and 87 ; fastisel succeeds). 88 ; CHECK: DW_TAG_formal_parameter 89 ; CHECK-NOT: DW_TAG 90 ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_B]]} 91 92 ; The two lexical blocks here are caused by the scope of the if that includes 93 ; the condition variable, and the scope within the if's composite statement. I'm 94 ; not sure we really need both of them since there's no variable declared in the 95 ; outer of the two 96 97 ; CHECK-NOT: {{DW_TAG|NULL}} 98 ; CHECK: DW_TAG_lexical_block 99 ; CHECK-NOT: {{DW_TAG|NULL}} 100 ; CHECK: DW_TAG_lexical_block 101 ; CHECK-NOT: {{DW_TAG|NULL}} 102 ; CHECK: DW_TAG_variable 103 ; CHECK-NOT: DW_TAG 104 ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_S]]} 105 106 @t = external global i32 107 108 ; Function Attrs: uwtable 109 define void @_Z1bv() #0 { 110 entry: 111 tail call void @llvm.dbg.value(metadata !24, i64 0, metadata !25), !dbg !27 112 tail call void @_Z1fi(i32 0), !dbg !28 113 ret void, !dbg !29 114 } 115 116 ; Function Attrs: uwtable 117 define void @_Z1ab(i1 zeroext %u) #0 { 118 entry: 119 tail call void @llvm.dbg.value(metadata !{i1 %u}, i64 0, metadata !13), !dbg !30 120 tail call void @llvm.dbg.value(metadata !{i1 %u}, i64 0, metadata !31), !dbg !33 121 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 122 123 if.then.i: ; preds = %entry 124 %0 = load i32* @t, align 4, !dbg !35, !tbaa !36 125 tail call void @llvm.dbg.value(metadata !{i32 %0}, i64 0, metadata !40), !dbg !35 126 tail call void @_Z1fi(i32 %0), !dbg !41 127 br label %_Z1xb.exit, !dbg !42 128 129 _Z1xb.exit: ; preds = %entry, %if.then.i 130 tail call void @_Z1fi(i32 0), !dbg !43 131 ret void, !dbg !44 132 } 133 134 declare void @_Z1fi(i32) #1 135 136 ; Function Attrs: nounwind readnone 137 declare void @llvm.dbg.value(metadata, i64, metadata) #2 138 139 attributes #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" } 140 attributes #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" } 141 attributes #2 = { nounwind readnone } 142 143 !llvm.dbg.cu = !{!0} 144 !llvm.module.flags = !{!21, !22} 145 !llvm.ident = !{!23} 146 147 !0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/missing-abstract-variables.cc] [DW_LANG_C_plus_plus] 148 !1 = metadata !{metadata !"missing-abstract-variables.cc", metadata !"/tmp/dbginfo"} 149 !2 = metadata !{} 150 !3 = metadata !{metadata !4, metadata !8, metadata !14} 151 !4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"b", metadata !"b", metadata !"_Z1bv", i32 13, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_Z1bv, null, null, metadata !2, i32 13} ; [ DW_TAG_subprogram ] [line 13] [def] [b] 152 !5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/missing-abstract-variables.cc] 153 !6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 154 !7 = metadata !{null} 155 !8 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"a", metadata !"a", metadata !"_Z1ab", i32 17, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i1)* @_Z1ab, null, null, metadata !12, i32 17} ; [ DW_TAG_subprogram ] [line 17] [def] [a] 156 !9 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !10, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 157 !10 = metadata !{null, metadata !11} 158 !11 = metadata !{i32 786468, null, null, metadata !"bool", i32 0, i64 8, i64 8, i64 0, i32 0, i32 2} ; [ DW_TAG_base_type ] [bool] [line 0, size 8, align 8, offset 0, enc DW_ATE_boolean] 159 !12 = metadata !{metadata !13} 160 !13 = metadata !{i32 786689, metadata !8, metadata !"u", metadata !5, i32 16777233, metadata !11, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [u] [line 17] 161 !14 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"x", metadata !"x", metadata !"_Z1xb", i32 5, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, null, metadata !15, i32 5} ; [ DW_TAG_subprogram ] [line 5] [def] [x] 162 !15 = metadata !{metadata !16, metadata !17} 163 !16 = metadata !{i32 786689, metadata !14, metadata !"b", metadata !5, i32 16777221, metadata !11, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [b] [line 5] 164 !17 = metadata !{i32 786688, metadata !18, metadata !"s", metadata !5, i32 7, metadata !20, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [s] [line 7] 165 !18 = metadata !{i32 786443, metadata !1, metadata !19, i32 6, i32 0, i32 0, i32 1} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/missing-abstract-variables.cc] 166 !19 = metadata !{i32 786443, metadata !1, metadata !14, i32 6, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/missing-abstract-variables.cc] 167 !20 = 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] 168 !21 = metadata !{i32 2, metadata !"Dwarf Version", i32 4} 169 !22 = metadata !{i32 2, metadata !"Debug Info Version", i32 1} 170 !23 = metadata !{metadata !"clang version 3.5.0 "} 171 !24 = metadata !{i1 false} 172 !25 = metadata !{i32 786689, metadata !14, metadata !"b", metadata !5, i32 16777221, metadata !11, i32 0, metadata !26} ; [ DW_TAG_arg_variable ] [b] [line 5] 173 !26 = metadata !{i32 14, i32 0, metadata !4, null} 174 !27 = metadata !{i32 5, i32 0, metadata !14, metadata !26} 175 !28 = metadata !{i32 10, i32 0, metadata !14, metadata !26} 176 !29 = metadata !{i32 15, i32 0, metadata !4, null} 177 !30 = metadata !{i32 17, i32 0, metadata !8, null} 178 !31 = metadata !{i32 786689, metadata !14, metadata !"b", metadata !5, i32 16777221, metadata !11, i32 0, metadata !32} ; [ DW_TAG_arg_variable ] [b] [line 5] 179 !32 = metadata !{i32 18, i32 0, metadata !8, null} 180 !33 = metadata !{i32 5, i32 0, metadata !14, metadata !32} 181 !34 = metadata !{i32 6, i32 0, metadata !19, metadata !32} 182 !35 = metadata !{i32 7, i32 0, metadata !18, metadata !32} 183 !36 = metadata !{metadata !37, metadata !37, i64 0} 184 !37 = metadata !{metadata !"int", metadata !38, i64 0} 185 !38 = metadata !{metadata !"omnipotent char", metadata !39, i64 0} 186 !39 = metadata !{metadata !"Simple C/C++ TBAA"} 187 !40 = metadata !{i32 786688, metadata !18, metadata !"s", metadata !5, i32 7, metadata !20, i32 0, metadata !32} ; [ DW_TAG_auto_variable ] [s] [line 7] 188 !41 = metadata !{i32 8, i32 0, metadata !18, metadata !32} ; [ DW_TAG_imported_declaration ] 189 !42 = metadata !{i32 9, i32 0, metadata !18, metadata !32} 190 !43 = metadata !{i32 10, i32 0, metadata !14, metadata !32} 191 !44 = metadata !{i32 19, i32 0, metadata !8, null} 192
