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https://github.com/c64scene-ar/llvm-6502.git
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02474a32eb
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! Note: I accidentally committed a bogus older version of this patch previously. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218787 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
5.1 KiB
LLVM
103 lines
5.1 KiB
LLVM
; REQUIRES: object-emission
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;
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; RUN: llvm-link %s %p/type-unique-odr-b.ll -S -o - | %llc_dwarf -filetype=obj -O0 | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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;
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; Test ODR-based type uniquing for C++ class members.
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; rdar://problem/15851313.
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;
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; $ cat -n type-unique-odr-a.cpp
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; 1 class A {
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; 2 int data;
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; 3 protected:
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; 4 void getFoo();
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; 5 };
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; 6
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; 7 static void bar() {
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; 8 A a;
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; 9 }
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; 10
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; 11 void baz() { bar(); }
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;; #include "ab.h"
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; foo_t bar() {
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; return A().getFoo();
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; }
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;
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; CHECK: DW_TAG_class_type
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; CHECK-NEXT: DW_AT_name {{.*}} "A"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_member
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; CHECK-NEXT: DW_AT_name {{.*}} "data"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_ZN1A6getFooEv"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "getFoo"
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_Z3bazv"
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_ZL3barv"
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; getFoo and A may only appear once.
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; CHECK-NOT: {{(getFoo)|("A")}}
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; ModuleID = 'type-unique-odr-a.cpp'
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%class.A = type { i32 }
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; Function Attrs: nounwind
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define void @_Z3bazv() #0 {
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entry:
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call void @_ZL3barv(), !dbg !23
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ret void, !dbg !23
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}
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; Function Attrs: nounwind
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define internal void @_ZL3barv() #0 {
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entry:
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%a = alloca %class.A, align 4
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call void @llvm.dbg.declare(metadata !{%class.A* %a}, metadata !24, metadata !{i32 786690}), !dbg !25
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ret void, !dbg !26
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!20, !21}
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!llvm.ident = !{!22}
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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 !3, metadata !14, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [<unknown>] [DW_LANG_C_plus_plus]
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!1 = metadata !{metadata !"<unknown>", metadata !""}
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!2 = metadata !{}
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!3 = metadata !{metadata !4}
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!4 = metadata !{i32 786434, metadata !5, null, metadata !"A", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !6, i32 0, null, null, metadata !"_ZTS1A"} ; [ DW_TAG_class_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from ]
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!5 = metadata !{metadata !"type-unique-odr-a.cpp", metadata !""}
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!6 = metadata !{metadata !7, metadata !9}
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!7 = metadata !{i32 786445, metadata !5, metadata !"_ZTS1A", metadata !"data", i32 2, i64 32, i64 32, i64 0, i32 1, metadata !8} ; [ DW_TAG_member ] [data] [line 2, size 32, align 32, offset 0] [private] [from int]
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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 786478, metadata !5, metadata !"_ZTS1A", metadata !"getFoo", metadata !"getFoo", metadata !"_ZN1A6getFooEv", i32 4, metadata !10, i1 false, i1 false, i32 0, i32 0, null, i32 258, i1 false, null, null, i32 0, metadata !13, i32 4} ; [ DW_TAG_subprogram ] [line 4] [protected] [getFoo]
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!10 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !11, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!11 = metadata !{null, metadata !12}
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!12 = 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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!13 = metadata !{i32 786468}
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!14 = metadata !{metadata !15, metadata !19}
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!15 = metadata !{i32 786478, metadata !5, metadata !16, metadata !"baz", metadata !"baz", metadata !"_Z3bazv", i32 11, metadata !17, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z3bazv, null, null, metadata !2, i32 11} ; [ DW_TAG_subprogram ] [line 11] [def] [baz]
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!16 = metadata !{i32 786473, metadata !5} ; [ DW_TAG_file_type ] [type-unique-odr-a.cpp]
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!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 ]
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!18 = metadata !{null}
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!19 = metadata !{i32 786478, metadata !5, metadata !16, metadata !"bar", metadata !"bar", metadata !"_ZL3barv", i32 7, metadata !17, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_ZL3barv, null, null, metadata !2, i32 7} ; [ DW_TAG_subprogram ] [line 7] [local] [def] [bar]
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!20 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!21 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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!22 = metadata !{metadata !"clang version 3.5.0 "}
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!23 = metadata !{i32 11, i32 0, metadata !15, null}
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!24 = metadata !{i32 786688, metadata !19, metadata !"a", metadata !16, i32 8, metadata !"_ZTS1A", i32 0, i32 0} ; [ DW_TAG_auto_variable ] [a] [line 8]
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!25 = metadata !{i32 8, i32 0, metadata !19, null} ; [ DW_TAG_imported_declaration ]
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!26 = metadata !{i32 9, i32 0, metadata !19, null}
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