; REQUIRES: object-emission ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s ; The formal parameter 'b' for Function 'x' when inlined within 'a' is lost on ; mips and powerpc64 (and on x86_64 at at least -O2). Presumably this is a ; SelectionDAG issue (do mips/powerpc64 use FastISel?). ; XFAIL: mips, powerpc64, s390x ; Build from the following source with clang -O2. ; The important details are that 'x's abstract definition is first built during ; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's' ; variable is optimized away. No abstract definition DIE for 's' is constructed. ; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but ; the abstract DIE isn't (since the abstract definition for 'b' is already ; built). This results in 's' inlined in 'a' being emitted with its name, line, ; file there, rather than referencing an abstract definition. ; extern int t; ; ; void f(int); ; ; inline void x(bool b) { ; if (b) { ; int s = t; ; f(s); ; } ; f(0); ; } ; ; void b() { ; x(false); ; } ; ; void a(bool u) { ; x(u); ; } ; CHECK: [[ABS_X:.*]]: DW_TAG_subprogram ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name {{.*}} "x" ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: [[ABS_B:.*]]: DW_TAG_formal_parameter ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name {{.*}} "b" ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_lexical_block ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_lexical_block ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: [[ABS_S:.*]]: DW_TAG_variable ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name {{.*}} "s" ; CHECK: DW_TAG_subprogram ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name {{.*}} "b" ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_inlined_subroutine ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_X]]} ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_formal_parameter ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_B]]} ; Notice 'x's local variable 's' is missing. Not necessarily a bug here, ; since it's been optimized entirely away and it should be described in ; abstract subprogram. ; CHECK-NOT: DW_TAG ; CHECK: NULL ; CHECK-NOT: DW_TAG ; CHECK: NULL ; CHECK: DW_TAG_subprogram ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name {{.*}} "a" ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_formal_parameter ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_inlined_subroutine ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_X]]} ; CHECK-NOT: {{DW_TAG|NULL}} ; FIXME: This formal parameter goes missing at least at -O2 (& on ; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and ; fastisel succeeds). ; CHECK: DW_TAG_formal_parameter ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_B]]} ; The two lexical blocks here are caused by the scope of the if that includes ; the condition variable, and the scope within the if's composite statement. I'm ; not sure we really need both of them since there's no variable declared in the ; outer of the two ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_lexical_block ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_lexical_block ; CHECK-NOT: {{DW_TAG|NULL}} ; CHECK: DW_TAG_variable ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_abstract_origin {{.*}} {[[ABS_S]]} @t = external global i32 ; Function Attrs: uwtable define void @_Z1bv() #0 { entry: tail call void @llvm.dbg.value(metadata !24, i64 0, metadata !25), !dbg !27 tail call void @_Z1fi(i32 0), !dbg !28 ret void, !dbg !29 } ; Function Attrs: uwtable define void @_Z1ab(i1 zeroext %u) #0 { entry: tail call void @llvm.dbg.value(metadata !{i1 %u}, i64 0, metadata !13), !dbg !30 tail call void @llvm.dbg.value(metadata !{i1 %u}, i64 0, metadata !31), !dbg !33 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 if.then.i: ; preds = %entry %0 = load i32* @t, align 4, !dbg !35, !tbaa !36 tail call void @llvm.dbg.value(metadata !{i32 %0}, i64 0, metadata !40), !dbg !35 tail call void @_Z1fi(i32 %0), !dbg !41 br label %_Z1xb.exit, !dbg !42 _Z1xb.exit: ; preds = %entry, %if.then.i tail call void @_Z1fi(i32 0), !dbg !43 ret void, !dbg !44 } declare void @_Z1fi(i32) #1 ; Function Attrs: nounwind readnone declare void @llvm.dbg.value(metadata, i64, metadata) #2 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" } 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" } attributes #2 = { nounwind readnone } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!21, !22} !llvm.ident = !{!23} !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] !1 = metadata !{metadata !"missing-abstract-variables.cc", metadata !"/tmp/dbginfo"} !2 = metadata !{} !3 = metadata !{metadata !4, metadata !8, metadata !14} !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] !5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/missing-abstract-variables.cc] !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 ] !7 = metadata !{null} !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] !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 ] !10 = metadata !{null, metadata !11} !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] !12 = metadata !{metadata !13} !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] !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] !15 = metadata !{metadata !16, metadata !17} !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] !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] !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] !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] !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] !21 = metadata !{i32 2, metadata !"Dwarf Version", i32 4} !22 = metadata !{i32 2, metadata !"Debug Info Version", i32 1} !23 = metadata !{metadata !"clang version 3.5.0 "} !24 = metadata !{i1 false} !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] !26 = metadata !{i32 14, i32 0, metadata !4, null} !27 = metadata !{i32 5, i32 0, metadata !14, metadata !26} !28 = metadata !{i32 10, i32 0, metadata !14, metadata !26} !29 = metadata !{i32 15, i32 0, metadata !4, null} !30 = metadata !{i32 17, i32 0, metadata !8, null} !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] !32 = metadata !{i32 18, i32 0, metadata !8, null} !33 = metadata !{i32 5, i32 0, metadata !14, metadata !32} !34 = metadata !{i32 6, i32 0, metadata !19, metadata !32} !35 = metadata !{i32 7, i32 0, metadata !18, metadata !32} !36 = metadata !{metadata !37, metadata !37, i64 0} !37 = metadata !{metadata !"int", metadata !38, i64 0} !38 = metadata !{metadata !"omnipotent char", metadata !39, i64 0} !39 = metadata !{metadata !"Simple C/C++ TBAA"} !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] !41 = metadata !{i32 8, i32 0, metadata !18, metadata !32} ; [ DW_TAG_imported_declaration ] !42 = metadata !{i32 9, i32 0, metadata !18, metadata !32} !43 = metadata !{i32 10, i32 0, metadata !14, metadata !32} !44 = metadata !{i32 19, i32 0, metadata !8, null}