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076fd5dfc1
llvm-6502/test/Linker/type-unique-type-array-a.ll
Adrian Prantl 076fd5dfc1 Move the complex address expression out of DIVariable and into an extra 
argument of the llvm.dbg.declare/llvm.dbg.value intrinsics.

Previously, DIVariable was a variable-length field that has an optional
reference to a Metadata array consisting of a variable number of
complex address expressions. In the case of OpPiece expressions this is
wasting a lot of storage in IR, because when an aggregate type is, e.g.,
SROA'd into all of its n individual members, the IR will contain n copies
of the DIVariable, all alike, only differing in the complex address
reference at the end.

By making the complex address into an extra argument of the
dbg.value/dbg.declare intrinsics, all of the pieces can reference the
same variable and the complex address expressions can be uniqued across
the CU, too.
Down the road, this will allow us to move other flags, such as
"indirection" out of the DIVariable, too.

The new intrinsics look like this:
declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr)
declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr)

This patch adds a new LLVM-local tag to DIExpressions, so we can detect
and pretty-print DIExpression metadata nodes.

What this patch doesn't do:

This patch does not touch the "Indirect" field in DIVariable; but moving
that into the expression would be a natural next step.

http://reviews.llvm.org/D4919
rdar://problem/17994491

Thanks to dblaikie and dexonsmith for reviewing this patch!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218778 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-01 17:55:39 +00:00

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; REQUIRES: object-emission
;
; RUN: llvm-link %s %p/type-unique-type-array-b.ll -S -o - | %llc_dwarf -filetype=obj -O0 | llvm-dwarfdump -debug-dump=info - | FileCheck %s
;
; rdar://problem/17628609
;
; cat -n a.cpp
; 1 struct SA {
; 2 int a;
; 3 };
; 4
; 5 class A {
; 6 public:
; 7 void testA(SA a) {
; 8 }
; 9 };
; 10
; 11 void topA(A *a, SA sa) {
; 12 a->testA(sa);
; 13 }
;
; CHECK: DW_TAG_compile_unit
; CHECK: DW_TAG_class_type
; CHECK-NEXT: DW_AT_name {{.*}} "A"
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_ZN1A5testAE2SA"
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + 0x{{.*}} => {0x[[STRUCT:.*]]})
; CHECK: 0x[[STRUCT]]: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name {{.*}} "SA"
; CHECK: DW_TAG_compile_unit
; CHECK: DW_TAG_class_type
; CHECK-NEXT: DW_AT_name {{.*}} "B"
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_ZN1B5testBE2SA"
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_type [DW_FORM_ref_addr] {{.*}}[[STRUCT]]
%class.A = type { i8 }
%struct.SA = type { i32 }
; Function Attrs: ssp uwtable
define void @_Z4topAP1A2SA(%class.A* %a, i32 %sa.coerce) #0 {
entry:
%sa = alloca %struct.SA, align 4
%a.addr = alloca %class.A*, align 8
%agg.tmp = alloca %struct.SA, align 4
%coerce.dive = getelementptr %struct.SA* %sa, i32 0, i32 0
store i32 %sa.coerce, i32* %coerce.dive
store %class.A* %a, %class.A** %a.addr, align 8
call void @llvm.dbg.declare(metadata !{%class.A** %a.addr}, metadata !24, metadata !{}), !dbg !25
call void @llvm.dbg.declare(metadata !{%struct.SA* %sa}, metadata !26, metadata !{}), !dbg !27
%0 = load %class.A** %a.addr, align 8, !dbg !28
%1 = bitcast %struct.SA* %agg.tmp to i8*, !dbg !28
%2 = bitcast %struct.SA* %sa to i8*, !dbg !28
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %1, i8* %2, i64 4, i32 4, i1 false), !dbg !28
%coerce.dive1 = getelementptr %struct.SA* %agg.tmp, i32 0, i32 0, !dbg !28
%3 = load i32* %coerce.dive1, !dbg !28
call void @_ZN1A5testAE2SA(%class.A* %0, i32 %3), !dbg !28
ret void, !dbg !29
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind ssp uwtable
define linkonce_odr void @_ZN1A5testAE2SA(%class.A* %this, i32 %a.coerce) #2 align 2 {
entry:
%a = alloca %struct.SA, align 4
%this.addr = alloca %class.A*, align 8
%coerce.dive = getelementptr %struct.SA* %a, i32 0, i32 0
store i32 %a.coerce, i32* %coerce.dive
store %class.A* %this, %class.A** %this.addr, align 8
call void @llvm.dbg.declare(metadata !{%class.A** %this.addr}, metadata !30, metadata !{}), !dbg !31
call void @llvm.dbg.declare(metadata !{%struct.SA* %a}, metadata !32, metadata !{}), !dbg !33
%this1 = load %class.A** %this.addr
ret void, !dbg !34
}
; Function Attrs: nounwind
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #3
attributes #0 = { ssp 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" }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind ssp 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" }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!21, !22}
!llvm.ident = !{!23}
!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (trunk 214102:214113M) (llvm/trunk 214102:214115M)", i1 false, metadata !"", i32 0, metadata !2, metadata !3, metadata !14, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [a.cpp] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"a.cpp", metadata !"/Users/manmanren/test-Nov/type_unique/rdar_di_array"}
!2 = metadata !{}
!3 = metadata !{metadata !4, metadata !10}
!4 = metadata !{i32 786434, metadata !1, null, metadata !"A", i32 5, i64 8, i64 8, i32 0, i32 0, null, metadata !5, i32 0, null, null, metadata !"_ZTS1A"} ; [ DW_TAG_class_type ] [A] [line 5, size 8, align 8, offset 0] [def] [from ]
!5 = metadata !{metadata !6}
!6 = metadata !{i32 786478, metadata !1, metadata !"_ZTS1A", metadata !"testA", metadata !"testA", metadata !"_ZN1A5testAE2SA", i32 7, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, null, i32 7} ; [ DW_TAG_subprogram ] [line 7] [testA]
!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 ]
!8 = metadata !{null, metadata !9, metadata !"_ZTS2SA"}
!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]
!10 = metadata !{i32 786451, metadata !1, null, metadata !"SA", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !11, i32 0, null, null, metadata !"_ZTS2SA"} ; [ DW_TAG_structure_type ] [SA] [line 1, size 32, align 32, offset 0] [def] [from ]
!11 = metadata !{metadata !12}
!12 = metadata !{i32 786445, metadata !1, metadata !"_ZTS2SA", metadata !"a", i32 2, i64 32, i64 32, i64 0, i32 0, metadata !13} ; [ DW_TAG_member ] [a] [line 2, size 32, align 32, offset 0] [from int]
!13 = 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]
!14 = metadata !{metadata !15, metadata !20}
!15 = metadata !{i32 786478, metadata !1, metadata !16, metadata !"topA", metadata !"topA", metadata !"_Z4topAP1A2SA", i32 11, metadata !17, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.A*, i32)* @_Z4topAP1A2SA, null, null, metadata !2, i32 11} ; [ DW_TAG_subprogram ] [line 11] [def] [topA]
!16 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [a.cpp]
!17 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !18, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!18 = metadata !{null, metadata !19, metadata !"_ZTS2SA"}
!19 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS1A]
!20 = metadata !{i32 786478, metadata !1, metadata !"_ZTS1A", metadata !"testA", metadata !"testA", metadata !"_ZN1A5testAE2SA", i32 7, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.A*, i32)* @_ZN1A5testAE2SA, null, metadata !6, metadata !2, i32 7} ; [ DW_TAG_subprogram ] [line 7] [def] [testA]
!21 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
!22 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
!23 = metadata !{metadata !"clang version 3.5.0 (trunk 214102:214113M) (llvm/trunk 214102:214115M)"}
!24 = metadata !{i32 786689, metadata !15, metadata !"a", metadata !16, i32 16777227, metadata !19, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 11]
!25 = metadata !{i32 11, i32 14, metadata !15, null}
!26 = metadata !{i32 786689, metadata !15, metadata !"sa", metadata !16, i32 33554443, metadata !"_ZTS2SA", i32 0, i32 0} ; [ DW_TAG_arg_variable ] [sa] [line 11]
!27 = metadata !{i32 11, i32 20, metadata !15, null}
!28 = metadata !{i32 12, i32 3, metadata !15, null}
!29 = metadata !{i32 13, i32 1, metadata !15, null}
!30 = metadata !{i32 786689, metadata !20, metadata !"this", null, i32 16777216, metadata !19, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 0]
!31 = metadata !{i32 0, i32 0, metadata !20, null}
!32 = metadata !{i32 786689, metadata !20, metadata !"a", metadata !16, i32 33554439, metadata !"_ZTS2SA", i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 7]
!33 = metadata !{i32 7, i32 17, metadata !20, null}
!34 = metadata !{i32 8, i32 3, metadata !20, null} ; [ DW_TAG_imported_declaration ]
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