forked from OSchip/llvm-project
183 lines
7.4 KiB
LLVM
183 lines
7.4 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: 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: 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: 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 {{.*}} "_Z1xb"
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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 {{.*}} "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 {{.*}} "_Z1xb"
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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 {{.*}} "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 {{.*}} "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 i1 false, i64 0, metadata !25, metadata !{!"0x102"}), !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, metadata !{!"0x102"}), !dbg !30
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tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !31, metadata !{!"0x102"}), !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, metadata !{!"0x102"}), !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, 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 = !{!"0x11\004\00clang version 3.5.0 \001\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/missing-abstract-variables.cc] [DW_LANG_C_plus_plus]
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!1 = !{!"missing-abstract-variables.cc", !"/tmp/dbginfo"}
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!2 = !{}
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!3 = !{!4, !8, !14}
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!4 = !{!"0x2e\00b\00b\00_Z1bv\0013\000\001\000\006\00256\001\0013", !1, !5, !6, null, void ()* @_Z1bv, null, null, !2} ; [ DW_TAG_subprogram ] [line 13] [def] [b]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/missing-abstract-variables.cc]
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!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = !{null}
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!8 = !{!"0x2e\00a\00a\00_Z1ab\0017\000\001\000\006\00256\001\0017", !1, !5, !9, null, void (i1)* @_Z1ab, null, null, !12} ; [ DW_TAG_subprogram ] [line 17] [def] [a]
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!9 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !10, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!10 = !{null, !11}
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!11 = !{!"0x24\00bool\000\008\008\000\000\002", null, null} ; [ DW_TAG_base_type ] [bool] [line 0, size 8, align 8, offset 0, enc DW_ATE_boolean]
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!12 = !{!13}
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!13 = !{!"0x101\00u\0016777233\000", !8, !5, !11} ; [ DW_TAG_arg_variable ] [u] [line 17]
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!14 = !{!"0x2e\00x\00x\00_Z1xb\005\000\001\000\006\00256\001\005", !1, !5, !9, null, null, null, null, !15} ; [ DW_TAG_subprogram ] [line 5] [def] [x]
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!15 = !{!16, !17}
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!16 = !{!"0x101\00b\0016777221\000", !14, !5, !11} ; [ DW_TAG_arg_variable ] [b] [line 5]
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!17 = !{!"0x100\00s\007\000", !18, !5, !20} ; [ DW_TAG_auto_variable ] [s] [line 7]
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!18 = !{!"0xb\006\000\000", !1, !19} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/missing-abstract-variables.cc]
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!19 = !{!"0xb\006\000\000", !1, !14} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/missing-abstract-variables.cc]
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!20 = !{!"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]
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!21 = !{i32 2, !"Dwarf Version", i32 4}
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!22 = !{i32 2, !"Debug Info Version", i32 2}
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!23 = !{!"clang version 3.5.0 "}
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!24 = !{i1 false}
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!25 = !{!"0x101\00b\0016777221\000", !14, !5, !11, !26} ; [ DW_TAG_arg_variable ] [b] [line 5]
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!26 = !{i32 14, i32 0, !4, null}
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!27 = !{i32 5, i32 0, !14, !26}
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!28 = !{i32 10, i32 0, !14, !26}
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!29 = !{i32 15, i32 0, !4, null}
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!30 = !{i32 17, i32 0, !8, null}
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!31 = !{!"0x101\00b\0016777221\000", !14, !5, !11, !32} ; [ DW_TAG_arg_variable ] [b] [line 5]
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!32 = !{i32 18, i32 0, !8, null}
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!33 = !{i32 5, i32 0, !14, !32}
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!34 = !{i32 6, i32 0, !19, !32}
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!35 = !{i32 7, i32 0, !18, !32}
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!36 = !{!37, !37, i64 0}
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!37 = !{!"int", !38, i64 0}
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!38 = !{!"omnipotent char", !39, i64 0}
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!39 = !{!"Simple C/C++ TBAA"}
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!40 = !{!"0x100\00s\007\000", !18, !5, !20, !32} ; [ DW_TAG_auto_variable ] [s] [line 7]
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!41 = !{i32 8, i32 0, !18, !32}
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!42 = !{i32 9, i32 0, !18, !32}
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!43 = !{i32 10, i32 0, !14, !32}
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!44 = !{i32 19, i32 0, !8, null}
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