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647e271afe
Per feedback on r214111, we are going to use null to represent unspecified
parameter. If the type array is {null}, it means a function that returns void;
If the type array is {null, null}, it means a variadic function that returns
void. In summary if we have more than one element in the type array and the last
element is null, it is a variadic function.
rdar://17628609
llvm-svn: 214189
99 lines
5.3 KiB
LLVM
99 lines
5.3 KiB
LLVM
; RUN: %llc_dwarf -O0 -filetype=obj -o %t.o %s
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; RUN: llvm-dwarfdump -debug-dump=info %t.o | FileCheck %s
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; REQUIRES: object-emission
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;
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; Test debug info for variadic function arguments.
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; Created from tools/clang/tests/CodeGenCXX/debug-info-varargs.cpp
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;
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; The ... parameter of variadic should be emitted as
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; DW_TAG_unspecified_parameters.
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;
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; Normal variadic function.
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; void b(int c, ...);
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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 {{.*}} "a"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_unspecified_parameters
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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 {{.*}} "b"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_unspecified_parameters
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;
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; Variadic C++ member function.
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; struct A { void a(int c, ...); }
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;
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; Variadic function pointer.
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; void (*fptr)(int, ...);
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;
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; CHECK: DW_TAG_subroutine_type
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_unspecified_parameters
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;
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; ModuleID = 'llvm/tools/clang/test/CodeGenCXX/debug-info-varargs.cpp'
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%struct.A = type { i8 }
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; Function Attrs: nounwind ssp uwtable
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define void @_Z1biz(i32 %c, ...) #0 {
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%1 = alloca i32, align 4
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%a = alloca %struct.A, align 1
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%fptr = alloca void (i32, ...)*, align 8
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store i32 %c, i32* %1, align 4
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call void @llvm.dbg.declare(metadata !{i32* %1}, metadata !21), !dbg !22
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call void @llvm.dbg.declare(metadata !{%struct.A* %a}, metadata !23), !dbg !24
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call void @llvm.dbg.declare(metadata !{void (i32, ...)** %fptr}, metadata !25), !dbg !27
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store void (i32, ...)* @_Z1biz, void (i32, ...)** %fptr, align 8, !dbg !27
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ret void, !dbg !28
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata) #1
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!18, !19}
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!llvm.ident = !{!20}
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!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5 ", i1 false, metadata !"", i32 0, metadata !2, metadata !3, metadata !13, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [llvm/tools/clang/test/CodeGenCXX/debug-info-varargs.cpp] [DW_LANG_C_plus_plus]
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!1 = metadata !{metadata !"llvm/tools/clang/test/CodeGenCXX/debug-info-varargs.cpp", metadata !"radar/13690847"}
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!2 = metadata !{}
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!3 = metadata !{metadata !4}
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!4 = metadata !{i32 786451, metadata !1, null, metadata !"A", i32 3, i64 8, i64 8, i32 0, i32 0, null, metadata !5, i32 0, null, null, metadata !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 3, size 8, align 8, offset 0] [def] [from ]
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!5 = metadata !{metadata !6}
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!6 = metadata !{i32 786478, metadata !1, metadata !"_ZTS1A", metadata !"a", metadata !"a", metadata !"_ZN1A1aEiz", i32 6, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !12, i32 6} ; [ DW_TAG_subprogram ] [line 6] [a]
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!7 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = metadata !{null, metadata !9, metadata !10, null}
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!9 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS1A]
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!10 = 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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!12 = metadata !{i32 786468}
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!13 = metadata !{metadata !14}
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!14 = metadata !{i32 786478, metadata !1, metadata !15, metadata !"b", metadata !"b", metadata !"_Z1biz", i32 13, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32, ...)* @_Z1biz, null, null, metadata !2, i32 13} ; [ DW_TAG_subprogram ] [line 13] [def] [b]
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!15 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [llvm/tools/clang/test/CodeGenCXX/debug-info-varargs.cpp]
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!16 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !17, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!17 = metadata !{null, metadata !10, null}
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!18 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
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!19 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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!20 = metadata !{metadata !"clang version 3.5 "}
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!21 = metadata !{i32 786689, metadata !14, metadata !"c", metadata !15, i32 16777229, metadata !10, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [c] [line 13]
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!22 = metadata !{i32 13, i32 0, metadata !14, null}
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!23 = metadata !{i32 786688, metadata !14, metadata !"a", metadata !15, i32 16, metadata !4, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [a] [line 16]
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!24 = metadata !{i32 16, i32 0, metadata !14, null}
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!25 = metadata !{i32 786688, metadata !14, metadata !"fptr", metadata !15, i32 18, metadata !26, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [fptr] [line 18]
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!26 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !16} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
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!27 = metadata !{i32 18, i32 0, metadata !14, null}
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!28 = metadata !{i32 22, i32 0, metadata !14, null}
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