mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-24 23:29:41 +00:00
def5a05797
This is a precursor to fixing inlined debug info where the concrete, out-of-line definition may preceed any inlined usage. To cope with this, the attributes that may appear on the concrete definition or the abstract definition are delayed until the end of the module. Then, if an abstract definition was created, it is referenced (and no other attributes are added to the out-of-line definition), otherwise the attributes are added directly to the out-of-line definition. In a couple of cases this causes not just reordering of attributes, but reordering of types. When the creation of the attribute is delayed, if that creation would create a type (such as for a DW_AT_type attribute) then other top level DIEs may've been constructed during the delay, causing the referenced type to be created and added after those intervening DIEs. In the extreme case, in cross-cu-inlining.ll, this actually causes the DW_TAG_basic_type for "int" to move from one CU to another. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209674 91177308-0d34-0410-b5e6-96231b3b80d8
133 lines
6.4 KiB
LLVM
133 lines
6.4 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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; Build from source:
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; $ clang++ a.cpp b.cpp -g -c -emit-llvm
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; $ llvm-link a.bc b.bc -o ab.bc
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; $ opt -inline ab.bc -o ab-opt.bc
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; $ cat a.cpp
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; extern int i;
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; int func(int);
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; int main() {
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; return func(i);
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; }
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; $ cat b.cpp
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; int __attribute__((always_inline)) func(int x) {
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; return x * 2;
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; }
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; Ensure that func inlined into main is described and references the abstract
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; definition in b.cpp's CU.
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_name {{.*}} "a.cpp"
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_type [DW_FORM_ref_addr] (0x00000000[[INT:.*]])
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK-NEXT: DW_AT_abstract_origin {{.*}}[[ABS_FUNC:........]])
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NEXT: DW_AT_abstract_origin {{.*}}[[ABS_VAR:........]])
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; Check the abstract definition is in the 'b.cpp' CU and doesn't contain any
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; concrete information (address range or variable location)
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_name {{.*}} "b.cpp"
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; CHECK: 0x[[ABS_FUNC]]: DW_TAG_subprogram
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; CHECK-NOT: DW_AT_low_pc
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; CHECK: 0x[[ABS_VAR]]: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK-NOT: DW_AT_location
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; CHECK: DW_AT_type [DW_FORM_ref4] {{.*}} {0x[[INT]]}
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; CHECK-NOT: DW_AT_location
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; CHECK: 0x[[INT]]: DW_TAG_base_type
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "int"
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; Check the concrete out of line definition references the abstract and
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; provides the address range and variable location
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; CHECK: DW_TAG_subprogram
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; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {0x[[ABS_FUNC]]}
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; CHECK: DW_AT_low_pc
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {0x[[ABS_VAR]]}
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; CHECK: DW_AT_location
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@i = external global i32
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; Function Attrs: uwtable
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define i32 @main() #0 {
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entry:
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%x.addr.i = alloca i32, align 4
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%retval = alloca i32, align 4
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store i32 0, i32* %retval
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%0 = load i32* @i, align 4, !dbg !19
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%1 = bitcast i32* %x.addr.i to i8*
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call void @llvm.lifetime.start(i64 4, i8* %1)
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store i32 %0, i32* %x.addr.i, align 4
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call void @llvm.dbg.declare(metadata !{i32* %x.addr.i}, metadata !20), !dbg !21
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%2 = load i32* %x.addr.i, align 4, !dbg !22
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%mul.i = mul nsw i32 %2, 2, !dbg !22
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%3 = bitcast i32* %x.addr.i to i8*, !dbg !22
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call void @llvm.lifetime.end(i64 4, i8* %3), !dbg !22
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ret i32 %mul.i, !dbg !19
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}
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; Function Attrs: alwaysinline nounwind uwtable
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define i32 @_Z4funci(i32 %x) #1 {
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entry:
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%x.addr = alloca i32, align 4
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store i32 %x, i32* %x.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %x.addr}, metadata !20), !dbg !23
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%0 = load i32* %x.addr, align 4, !dbg !24
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%mul = mul nsw i32 %0, 2, !dbg !24
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ret i32 %mul, !dbg !24
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata) #2
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; Function Attrs: nounwind
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declare void @llvm.lifetime.start(i64, i8* nocapture) #3
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; Function Attrs: nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) #3
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attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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 = { alwaysinline nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0, !9}
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!llvm.module.flags = !{!16, !17}
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!llvm.ident = !{!18, !18}
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!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/a.cpp] [DW_LANG_C_plus_plus]
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!1 = metadata !{metadata !"a.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 786478, metadata !1, metadata !5, metadata !"main", metadata !"main", metadata !"", i32 3, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @main, null, null, metadata !2, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [main]
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!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/a.cpp]
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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 !{metadata !8}
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!8 = 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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!9 = metadata !{i32 786449, metadata !10, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !11, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/b.cpp] [DW_LANG_C_plus_plus]
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!10 = metadata !{metadata !"b.cpp", metadata !"/tmp/dbginfo"}
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!11 = metadata !{metadata !12}
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!12 = metadata !{i32 786478, metadata !10, metadata !13, metadata !"func", metadata !"func", metadata !"_Z4funci", i32 1, metadata !14, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z4funci, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [func]
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!13 = metadata !{i32 786473, metadata !10} ; [ DW_TAG_file_type ] [/tmp/dbginfo/b.cpp]
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!14 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!15 = metadata !{metadata !8, metadata !8}
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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 !{i32 4, i32 0, metadata !4, null}
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!20 = metadata !{i32 786689, metadata !12, metadata !"x", metadata !13, i32 16777217, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [x] [line 1]
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!21 = metadata !{i32 1, i32 0, metadata !12, metadata !19}
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!22 = metadata !{i32 2, i32 0, metadata !12, metadata !19}
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!23 = metadata !{i32 1, i32 0, metadata !12, null}
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!24 = metadata !{i32 2, i32 0, metadata !12, null}
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