2014-03-12 18:18:05 +00:00
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; REQUIRES: object-emission
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2014-03-12 23:08:19 +00:00
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; RUN: llc -mtriple x86_64-pc-linux -O0 -filetype=obj %s -o %t
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2014-03-12 18:18:05 +00:00
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; Testcase from:
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; struct base {
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; virtual ~base();
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; };
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; struct foo {
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; base b;
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; };
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; foo f;
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; Where member b should be seen as a field at an offset and not a bitfield.
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2014-03-12 20:12:02 +00:00
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; CHECK: DW_TAG_member
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2014-03-12 18:18:05 +00:00
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; CHECK: DW_AT_name{{.*}}"b"
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; CHECK-NOT: DW_AT_bit_offset
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2014-03-12 20:12:02 +00:00
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%struct.foo = type { %struct.base }
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%struct.base = type { i32 (...)** }
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2014-03-12 18:18:05 +00:00
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@f = global %struct.foo zeroinitializer, align 8
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@__dso_handle = external global i8
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@_ZTV4base = external unnamed_addr constant [4 x i8*]
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@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }]
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define internal void @__cxx_global_var_init() section ".text.startup" {
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entry:
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call void @_ZN3fooC2Ev(%struct.foo* @f) #2, !dbg !35
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%0 = call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.foo*)* @_ZN3fooD2Ev to void (i8*)*), i8* bitcast (%struct.foo* @f to i8*), i8* @__dso_handle) #2, !dbg !35
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ret void, !dbg !35
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}
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; Function Attrs: inlinehint nounwind uwtable
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define linkonce_odr void @_ZN3fooC2Ev(%struct.foo* %this) unnamed_addr #0 align 2 {
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entry:
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%this.addr = alloca %struct.foo*, align 8
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store %struct.foo* %this, %struct.foo** %this.addr, align 8
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2014-10-03 20:01:09 +00:00
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call void @llvm.dbg.declare(metadata !{%struct.foo** %this.addr}, metadata !36, metadata !{metadata !"0x102"}), !dbg !38
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2014-03-12 18:18:05 +00:00
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%this1 = load %struct.foo** %this.addr
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%b = getelementptr inbounds %struct.foo* %this1, i32 0, i32 0, !dbg !39
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call void @_ZN4baseC2Ev(%struct.base* %b) #2, !dbg !39
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ret void, !dbg !39
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}
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; Function Attrs: inlinehint uwtable
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define linkonce_odr void @_ZN3fooD2Ev(%struct.foo* %this) unnamed_addr #1 align 2 {
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entry:
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%this.addr = alloca %struct.foo*, align 8
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store %struct.foo* %this, %struct.foo** %this.addr, align 8
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2014-10-03 20:01:09 +00:00
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call void @llvm.dbg.declare(metadata !{%struct.foo** %this.addr}, metadata !40, metadata !{metadata !"0x102"}), !dbg !41
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2014-03-12 18:18:05 +00:00
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%this1 = load %struct.foo** %this.addr
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%b = getelementptr inbounds %struct.foo* %this1, i32 0, i32 0, !dbg !42
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call void @_ZN4baseD1Ev(%struct.base* %b), !dbg !42
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ret void, !dbg !44
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}
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; Function Attrs: nounwind
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declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*) #2
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; Function Attrs: nounwind readnone
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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!
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
2014-10-01 18:55:02 +00:00
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
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2014-03-12 18:18:05 +00:00
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declare void @_ZN4baseD1Ev(%struct.base*) #4
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; Function Attrs: inlinehint nounwind uwtable
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define linkonce_odr void @_ZN4baseC2Ev(%struct.base* %this) unnamed_addr #0 align 2 {
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entry:
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%this.addr = alloca %struct.base*, align 8
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store %struct.base* %this, %struct.base** %this.addr, align 8
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2014-10-03 20:01:09 +00:00
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call void @llvm.dbg.declare(metadata !{%struct.base** %this.addr}, metadata !45, metadata !{metadata !"0x102"}), !dbg !47
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2014-03-12 18:18:05 +00:00
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%this1 = load %struct.base** %this.addr
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%0 = bitcast %struct.base* %this1 to i8***, !dbg !48
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store i8** getelementptr inbounds ([4 x i8*]* @_ZTV4base, i64 0, i64 2), i8*** %0, !dbg !48
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ret void, !dbg !48
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}
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define internal void @_GLOBAL__I_a() section ".text.startup" {
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entry:
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call void @__cxx_global_var_init(), !dbg !49
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ret void, !dbg !49
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}
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attributes #0 = { inlinehint 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 #1 = { inlinehint 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 }
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attributes #3 = { nounwind readnone }
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attributes #4 = { "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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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!32, !33}
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!llvm.ident = !{!34}
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2014-10-03 20:01:09 +00:00
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!0 = metadata !{metadata !"0x11\004\00clang version 3.5.0 (trunk 203673) (llvm/trunk 203681)\000\00\000\00\001", metadata !1, metadata !2, metadata !3, metadata !8, metadata !30, metadata !2} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/foo.cc] [DW_LANG_C_plus_plus]
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2014-03-12 18:18:05 +00:00
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!1 = metadata !{metadata !"foo.cc", metadata !"/usr/local/google/home/echristo"}
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!2 = metadata !{}
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!3 = metadata !{metadata !4, metadata !7}
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2014-10-03 20:01:09 +00:00
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!4 = metadata !{metadata !"0x13\00foo\005\0064\0064\000\000\000", metadata !1, null, null, metadata !5, null, null, metadata !"_ZTS3foo"} ; [ DW_TAG_structure_type ] [foo] [line 5, size 64, align 64, offset 0] [def] [from ]
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2014-03-12 18:18:05 +00:00
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!5 = metadata !{metadata !6}
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2014-10-03 20:01:09 +00:00
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!6 = metadata !{metadata !"0xd\00b\006\0064\0064\000\000", metadata !1, metadata !"_ZTS3foo", metadata !"_ZTS4base"} ; [ DW_TAG_member ] [b] [line 6, size 64, align 64, offset 0] [from _ZTS4base]
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!7 = metadata !{metadata !"0x13\00base\001\000\000\000\004\000", metadata !1, null, null, null, null, null, metadata !"_ZTS4base"} ; [ DW_TAG_structure_type ] [base] [line 1, size 0, align 0, offset 0] [decl] [from ]
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2014-03-12 18:18:05 +00:00
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!8 = metadata !{metadata !9, metadata !13, metadata !19, metadata !22, metadata !28}
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2014-10-03 20:01:09 +00:00
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!9 = metadata !{metadata !"0x2e\00__cxx_global_var_init\00__cxx_global_var_init\00\009\001\001\000\006\00256\000\009", metadata !1, metadata !10, metadata !11, null, void ()* @__cxx_global_var_init, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 9] [local] [def] [__cxx_global_var_init]
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!10 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [/usr/local/google/home/echristo/foo.cc]
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!11 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !12, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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2014-03-12 18:18:05 +00:00
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!12 = metadata !{null}
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2014-10-03 20:01:09 +00:00
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!13 = metadata !{metadata !"0x2e\00~foo\00~foo\00_ZN3fooD2Ev\005\000\001\000\006\00320\000\005", metadata !1, metadata !"_ZTS3foo", metadata !14, null, void (%struct.foo*)* @_ZN3fooD2Ev, null, metadata !17, metadata !2} ; [ DW_TAG_subprogram ] [line 5] [def] [~foo]
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!14 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !15, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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2014-03-12 18:18:05 +00:00
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!15 = metadata !{null, metadata !16}
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2014-10-03 20:01:09 +00:00
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!16 = metadata !{metadata !"0xf\00\000\0064\0064\000\001088", null, null, metadata !"_ZTS3foo"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS3foo]
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!17 = metadata !{metadata !"0x2e\00~foo\00~foo\00\000\000\000\000\006\00320\000\000", null, metadata !"_ZTS3foo", metadata !14, null, null, null, i32 0, metadata !18} ; [ DW_TAG_subprogram ] [line 0] [~foo]
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2014-03-12 18:18:05 +00:00
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!18 = metadata !{i32 786468}
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2014-10-03 20:01:09 +00:00
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!19 = metadata !{metadata !"0x2e\00foo\00foo\00_ZN3fooC2Ev\005\000\001\000\006\00320\000\005", metadata !1, metadata !"_ZTS3foo", metadata !14, null, void (%struct.foo*)* @_ZN3fooC2Ev, null, metadata !20, metadata !2} ; [ DW_TAG_subprogram ] [line 5] [def] [foo]
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!20 = metadata !{metadata !"0x2e\00foo\00foo\00\000\000\000\000\006\00320\000\000", null, metadata !"_ZTS3foo", metadata !14, null, null, null, i32 0, metadata !21} ; [ DW_TAG_subprogram ] [line 0] [foo]
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2014-03-12 18:18:05 +00:00
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!21 = metadata !{i32 786468}
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2014-10-03 20:01:09 +00:00
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!22 = metadata !{metadata !"0x2e\00base\00base\00_ZN4baseC2Ev\001\000\001\000\006\00320\000\001", metadata !1, metadata !"_ZTS4base", metadata !23, null, void (%struct.base*)* @_ZN4baseC2Ev, null, metadata !26, metadata !2} ; [ DW_TAG_subprogram ] [line 1] [def] [base]
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!23 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !24, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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2014-03-12 18:18:05 +00:00
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!24 = metadata !{null, metadata !25}
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2014-10-03 20:01:09 +00:00
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!25 = metadata !{metadata !"0xf\00\000\0064\0064\000\001088", null, null, metadata !"_ZTS4base"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS4base]
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!26 = metadata !{metadata !"0x2e\00base\00base\00\000\000\000\000\006\00320\000\000", null, metadata !"_ZTS4base", metadata !23, null, null, null, i32 0, metadata !27} ; [ DW_TAG_subprogram ] [line 0] [base]
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2014-03-12 18:18:05 +00:00
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!27 = metadata !{i32 786468}
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2014-10-03 20:01:09 +00:00
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!28 = metadata !{metadata !"0x2e\00\00\00_GLOBAL__I_a\001\001\001\000\006\0064\000\001", metadata !1, metadata !10, metadata !29, null, void ()* @_GLOBAL__I_a, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 1] [local] [def]
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!29 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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2014-03-12 18:18:05 +00:00
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!30 = metadata !{metadata !31}
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2014-10-03 20:01:09 +00:00
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!31 = metadata !{metadata !"0x34\00f\00f\00\009\000\001", null, metadata !10, metadata !4, %struct.foo* @f, null} ; [ DW_TAG_variable ] [f] [line 9] [def]
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2014-03-12 18:18:05 +00:00
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!32 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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2014-10-03 20:01:09 +00:00
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!33 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
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2014-03-12 18:18:05 +00:00
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!34 = metadata !{metadata !"clang version 3.5.0 (trunk 203673) (llvm/trunk 203681)"}
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!35 = metadata !{i32 9, i32 0, metadata !9, null}
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2014-10-03 20:01:09 +00:00
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!36 = metadata !{metadata !"0x101\00this\0016777216\001088", metadata !19, null, metadata !37} ; [ DW_TAG_arg_variable ] [this] [line 0]
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!37 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !"_ZTS3foo"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS3foo]
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2014-03-12 18:18:05 +00:00
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!38 = metadata !{i32 0, i32 0, metadata !19, null}
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!39 = metadata !{i32 5, i32 0, metadata !19, null}
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2014-10-03 20:01:09 +00:00
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!40 = metadata !{metadata !"0x101\00this\0016777216\001088", metadata !13, null, metadata !37} ; [ DW_TAG_arg_variable ] [this] [line 0]
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2014-03-12 18:18:05 +00:00
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!41 = metadata !{i32 0, i32 0, metadata !13, null}
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!42 = metadata !{i32 5, i32 0, metadata !43, null}
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2014-10-03 20:01:09 +00:00
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!43 = metadata !{metadata !"0xb\005\000\000", metadata !1, metadata !13} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/foo.cc]
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2014-03-12 18:18:05 +00:00
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!44 = metadata !{i32 5, i32 0, metadata !13, null}
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2014-10-03 20:01:09 +00:00
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!45 = metadata !{metadata !"0x101\00this\0016777216\001088", metadata !22, null, metadata !46} ; [ DW_TAG_arg_variable ] [this] [line 0]
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!46 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !"_ZTS4base"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS4base]
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2014-03-12 18:18:05 +00:00
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!47 = metadata !{i32 0, i32 0, metadata !22, null}
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!48 = metadata !{i32 1, i32 0, metadata !22, null}
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!49 = metadata !{i32 1, i32 0, metadata !28, null}
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