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