llvm-6502/test/DebugInfo/X86/reference-argument.ll

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; RUN: llc -O0 -mtriple=x86_64-apple-darwin -filetype=asm %s -o - | FileCheck %s
; ModuleID = 'aggregate-indirect-arg.cpp'
; extracted from debuginfo-tests/aggregate-indirect-arg.cpp
; v should not be a pointer.
; CHECK: ##DEBUG_VALUE: foo:v <- RSI
; rdar://problem/13658587
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.9.0"
%class.SVal = type { i8*, i32 }
%class.A = type { i8 }
declare void @_Z3barR4SVal(%class.SVal* %v)
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
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare i32 @main()
; Function Attrs: nounwind ssp uwtable
define linkonce_odr void @_ZN1A3fooE4SVal(%class.A* %this, %class.SVal* %v) nounwind ssp uwtable align 2 {
entry:
%this.addr = alloca %class.A*, align 8
store %class.A* %this, %class.A** %this.addr, align 8
call void @llvm.dbg.declare(metadata !{%class.A** %this.addr}, metadata !59, metadata !{metadata !"0x102"}), !dbg !61
call void @llvm.dbg.declare(metadata !{%class.SVal* %v}, metadata !62, metadata !{metadata !"0x102"}), !dbg !61
%this1 = load %class.A** %this.addr
call void @_Z3barR4SVal(%class.SVal* %v), !dbg !61
ret void, !dbg !61
}
declare void @_ZN4SValD1Ev(%class.SVal* %this)
declare void @_ZN4SValD2Ev(%class.SVal* %this)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!47, !68}
!0 = metadata !{metadata !"0x11\004\00clang version 3.4 \000\00\000\00\000", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [aggregate-indirect-arg.cpp] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"aggregate-indirect-arg.cpp", metadata !""}
!2 = metadata !{}
!3 = metadata !{metadata !4, metadata !29, metadata !33, metadata !34, metadata !35}
!4 = metadata !{metadata !"0x2e\00bar\00bar\00_Z3barR4SVal\0019\000\001\000\006\00256\000\0019", metadata !1, metadata !5, metadata !6, null, void (%class.SVal*)* @_Z3barR4SVal, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 19] [def] [bar]
!5 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [aggregate-indirect-arg.cpp]
!6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{null, metadata !8}
!8 = metadata !{metadata !"0x10\00\000\000\000\000\000", null, null, metadata !9} ; [ DW_TAG_reference_type ] [line 0, size 0, align 0, offset 0] [from SVal]
!9 = metadata !{metadata !"0x2\00SVal\0012\00128\0064\000\000\000", metadata !1, null, null, metadata !10, null, null, null} ; [ DW_TAG_class_type ] [SVal] [line 12, size 128, align 64, offset 0] [def] [from ]
!10 = metadata !{metadata !11, metadata !14, metadata !16, metadata !21, metadata !23}
!11 = metadata !{metadata !"0xd\00Data\0015\0064\0064\000\000", metadata !1, metadata !9, metadata !12} ; [ DW_TAG_member ] [Data] [line 15, size 64, align 64, offset 0] [from ]
!12 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !13} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
!13 = metadata !{metadata !"0x26\00\000\000\000\000\000", null, null, null} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from ]
!14 = metadata !{metadata !"0xd\00Kind\0016\0032\0032\0064\000", metadata !1, metadata !9, metadata !15} ; [ DW_TAG_member ] [Kind] [line 16, size 32, align 32, offset 64] [from unsigned int]
!15 = metadata !{metadata !"0x24\00unsigned int\000\0032\0032\000\000\007", null, null} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned]
!16 = metadata !{metadata !"0x2e\00~SVal\00~SVal\00\0014\000\000\000\006\00256\000\0014", metadata !1, metadata !9, metadata !17, null, null, null, i32 0, metadata !20} ; [ DW_TAG_subprogram ] [line 14] [~SVal]
!17 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !18, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!18 = metadata !{null, metadata !19}
!19 = metadata !{metadata !"0xf\00\000\0064\0064\000\001088", i32 0, null, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from SVal]
!20 = metadata !{i32 786468}
!21 = metadata !{metadata !"0x2e\00SVal\00SVal\00\0012\000\000\000\006\00320\000\0012", metadata !1, metadata !9, metadata !17, null, null, null, i32 0, metadata !22} ; [ DW_TAG_subprogram ] [line 12] [SVal]
!22 = metadata !{i32 786468}
!23 = metadata !{metadata !"0x2e\00SVal\00SVal\00\0012\000\000\000\006\00320\000\0012", metadata !1, metadata !9, metadata !24, null, null, null, i32 0, metadata !28} ; [ DW_TAG_subprogram ] [line 12] [SVal]
!24 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !25, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!25 = metadata !{null, metadata !19, metadata !26}
!26 = metadata !{metadata !"0x10\00\000\000\000\000\000", null, null, metadata !27} ; [ DW_TAG_reference_type ] [line 0, size 0, align 0, offset 0] [from ]
!27 = metadata !{metadata !"0x26\00\000\000\000\000\000", null, null, metadata !9} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from SVal]
!28 = metadata !{i32 786468}
!29 = metadata !{metadata !"0x2e\00main\00main\00\0025\000\001\000\006\00256\000\0025", metadata !1, metadata !5, metadata !30, null, i32 ()* @main, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 25] [def] [main]
!30 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !31, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!31 = metadata !{metadata !32}
!32 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!33 = metadata !{metadata !"0x2e\00~SVal\00~SVal\00_ZN4SValD1Ev\0014\000\001\000\006\00256\000\0014", metadata !1, null, metadata !17, null, void (%class.SVal*)* @_ZN4SValD1Ev, null, metadata !16, metadata !2} ; [ DW_TAG_subprogram ] [line 14] [def] [~SVal]
!34 = metadata !{metadata !"0x2e\00~SVal\00~SVal\00_ZN4SValD2Ev\0014\000\001\000\006\00256\000\0014", metadata !1, null, metadata !17, null, void (%class.SVal*)* @_ZN4SValD2Ev, null, metadata !16, metadata !2} ; [ DW_TAG_subprogram ] [line 14] [def] [~SVal]
!35 = metadata !{metadata !"0x2e\00foo\00foo\00_ZN1A3fooE4SVal\0022\000\001\000\006\00256\000\0022", metadata !1, null, metadata !36, null, void (%class.A*, %class.SVal*)* @_ZN1A3fooE4SVal, null, metadata !41, metadata !2} ; [ DW_TAG_subprogram ] [line 22] [def] [foo]
!36 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !37, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!37 = metadata !{null, metadata !38, metadata !9}
!38 = metadata !{metadata !"0xf\00\000\0064\0064\000\001088", i32 0, null, metadata !39} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from A]
!39 = metadata !{metadata !"0x2\00A\0020\008\008\000\000\000", metadata !1, null, null, metadata !40, null, null, null} ; [ DW_TAG_class_type ] [A] [line 20, size 8, align 8, offset 0] [def] [from ]
!40 = metadata !{metadata !41, metadata !43}
!41 = metadata !{metadata !"0x2e\00foo\00foo\00_ZN1A3fooE4SVal\0022\000\000\000\006\00256\000\0022", metadata !1, metadata !39, metadata !36, null, null, null, i32 0, metadata !42} ; [ DW_TAG_subprogram ] [line 22] [foo]
!42 = metadata !{i32 786468}
!43 = metadata !{metadata !"0x2e\00A\00A\00\0020\000\000\000\006\00320\000\0020", metadata !1, metadata !39, metadata !44, null, null, null, i32 0, metadata !46} ; [ DW_TAG_subprogram ] [line 20] [A]
!44 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !45, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!45 = metadata !{null, metadata !38}
!46 = metadata !{i32 786468}
!47 = metadata !{i32 2, metadata !"Dwarf Version", i32 3}
!48 = metadata !{metadata !"0x101\00v\0016777235\000", metadata !4, metadata !5, metadata !8} ; [ DW_TAG_arg_variable ] [v] [line 19]
!49 = metadata !{i32 19, i32 0, metadata !4, null}
!50 = metadata !{metadata !"0x100\00v\0026\000", metadata !29, metadata !5, metadata !9} ; [ DW_TAG_auto_variable ] [v] [line 26]
!51 = metadata !{i32 26, i32 0, metadata !29, null}
!52 = metadata !{i32 27, i32 0, metadata !29, null}
!53 = metadata !{i32 28, i32 0, metadata !29, null}
!54 = metadata !{metadata !"0x100\00a\0029\000", metadata !29, metadata !5, metadata !39} ; [ DW_TAG_auto_variable ] [a] [line 29]
!55 = metadata !{i32 29, i32 0, metadata !29, null}
!56 = metadata !{i32 30, i32 0, metadata !29, null}
!57 = metadata !{i32 31, i32 0, metadata !29, null}
!58 = metadata !{i32 32, i32 0, metadata !29, null}
!59 = metadata !{metadata !"0x101\00this\0016777238\001088", metadata !35, metadata !5, metadata !60} ; [ DW_TAG_arg_variable ] [this] [line 22]
!60 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !39} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
!61 = metadata !{i32 22, i32 0, metadata !35, null}
!62 = metadata !{metadata !"0x101\00v\0033554454\008192", metadata !35, metadata !5, metadata !9} ; [ DW_TAG_arg_variable ] [v] [line 22]
!63 = metadata !{metadata !"0x101\00this\0016777230\001088", metadata !33, metadata !5, metadata !64} ; [ DW_TAG_arg_variable ] [this] [line 14]
!64 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from SVal]
!65 = metadata !{i32 14, i32 0, metadata !33, null}
!66 = metadata !{metadata !"0x101\00this\0016777230\001088", metadata !34, metadata !5, metadata !64} ; [ DW_TAG_arg_variable ] [this] [line 14]
!67 = metadata !{i32 14, i32 0, metadata !34, null}
!68 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}