mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-08 18:30:04 +00:00
0fcb9cb1c1
This doesn't fix the abstract variable handling yet, but it introduces a similar delay mechanism as was added for subprograms, causing DW_AT_location to be reordered to the beginning of the attribute list for local variables, and fixes all the test fallout for that. A subsequent commit will remove the abstract variable handling in DbgVariable and just do the abstract variable lookup at module end to ensure that abstract variables introduced after their concrete counterparts are appropriately referenced by the concrete variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210943 91177308-0d34-0410-b5e6-96231b3b80d8
82 lines
4.4 KiB
LLVM
82 lines
4.4 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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; Built from the following source with clang -O1
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; struct S { int i; };
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; int function(struct S s, int i) { return s.i + i; }
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; Due to the X86_64 ABI, 's' is passed in registers and once optimized, the
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; entirety of 's' is never reconstituted, since only the int is required, and
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; thus the variable's location is unknown/dead to debug info.
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; Future/current work should enable us to describe partial variables, which, in
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; this case, happens to be the entire variable.
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "function"
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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 {{.*}} "s"
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; CHECK-NOT: DW_TAG
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; FIXME: Even though 's' is never reconstituted into a struct, the one member
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; variable is still live and used, and so we should be able to describe 's's
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; location as the location of that int.
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; CHECK-NOT: DW_AT_location
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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_location
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "i"
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%struct.S = type { i32 }
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; Function Attrs: nounwind readnone uwtable
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define i32 @_Z8function1Si(i32 %s.coerce, i32 %i) #0 {
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entry:
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tail call void @llvm.dbg.declare(metadata !19, metadata !14), !dbg !20
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tail call void @llvm.dbg.value(metadata !{i32 %i}, i64 0, metadata !15), !dbg !20
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%add = add nsw i32 %i, %s.coerce, !dbg !20
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ret i32 %add, !dbg !20
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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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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata) #1
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attributes #0 = { nounwind readnone 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 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!16, !17}
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!llvm.ident = !{!18}
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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 !3, metadata !8, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/dead-argument-order.cpp] [DW_LANG_C_plus_plus]
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!1 = metadata !{metadata !"dead-argument-order.cpp", metadata !"/tmp/dbginfo"}
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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 !"S", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !5, i32 0, null, null, metadata !"_ZTS1S"} ; [ DW_TAG_structure_type ] [S] [line 1, size 32, align 32, offset 0] [def] [from ]
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!5 = metadata !{metadata !6}
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!6 = metadata !{i32 786445, metadata !1, metadata !"_ZTS1S", metadata !"i", i32 1, i64 32, i64 32, i64 0, i32 0, metadata !7} ; [ DW_TAG_member ] [i] [line 1, size 32, align 32, offset 0] [from int]
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!7 = 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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!8 = metadata !{metadata !9}
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!9 = metadata !{i32 786478, metadata !1, metadata !10, metadata !"function", metadata !"function", metadata !"_Z8function1Si", i32 2, metadata !11, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 (i32, i32)* @_Z8function1Si, null, null, metadata !13, i32 2} ; [ DW_TAG_subprogram ] [line 2] [def] [function]
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!10 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/dead-argument-order.cpp]
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!11 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!12 = metadata !{metadata !7, metadata !4, metadata !7}
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!13 = metadata !{metadata !14, metadata !15}
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!14 = metadata !{i32 786689, metadata !9, metadata !"s", metadata !10, i32 16777218, metadata !"_ZTS1S", i32 0, i32 0} ; [ DW_TAG_arg_variable ] [s] [line 2]
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!15 = metadata !{i32 786689, metadata !9, metadata !"i", metadata !10, i32 33554434, metadata !7, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [i] [line 2]
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!16 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!17 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
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!18 = metadata !{metadata !"clang version 3.5.0 "}
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!19 = metadata !{%struct.S* undef}
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!20 = metadata !{i32 2, i32 0, metadata !9, null}
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