llvm-6502/test/DebugInfo/enum-types.ll

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; REQUIRES: object-emission
;
; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; Make sure we can handle enums with the same identifier but in enum types of
; different compile units.
; rdar://17628609
; CHECK: DW_TAG_compile_unit
; CHECK: 0x[[ENUM:.*]]: DW_TAG_enumeration_type
; CHECK-NEXT: DW_AT_name {{.*}} "EA"
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_Z4topA2EA"
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_AT_type [DW_FORM_ref4] (cu + 0x{{.*}} => {0x[[ENUM]]})
; CHECK: DW_TAG_compile_unit
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_MIPS_linkage_name {{.*}} "_Z4topB2EA"
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_AT_type [DW_FORM_ref_addr] {{.*}}[[ENUM]]
; Function Attrs: nounwind ssp uwtable
define void @_Z4topA2EA(i32 %sa) #0 {
entry:
%sa.addr = alloca i32, align 4
store i32 %sa, i32* %sa.addr, align 4
call void @llvm.dbg.declare(metadata !{i32* %sa.addr}, metadata !22, metadata !{metadata !"0x102"}), !dbg !23
ret void, !dbg !24
}
; Function Attrs: nounwind readnone
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
; Function Attrs: nounwind ssp uwtable
define void @_Z4topB2EA(i32 %sa) #0 {
entry:
%sa.addr = alloca i32, align 4
store i32 %sa, i32* %sa.addr, align 4
call void @llvm.dbg.declare(metadata !{i32* %sa.addr}, metadata !25, metadata !{metadata !"0x102"}), !dbg !26
ret void, !dbg !27
}
attributes #0 = { 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 #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0, !12}
!llvm.module.flags = !{!19, !20}
!llvm.ident = !{!21, !21}
!0 = metadata !{metadata !"0x11\004\00clang version 3.5.0 (trunk 214102:214133) (llvm/trunk 214102:214132)\000\00\000\00\001", metadata !1, metadata !2, metadata !2, metadata !6, metadata !11, metadata !11} ; [ DW_TAG_compile_unit ] [<unknown>] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"a.cpp", metadata !""}
!2 = metadata !{metadata !3}
!3 = metadata !{metadata !"0x4\00EA\001\0032\0032\000\000\000", metadata !1, null, null, metadata !4, null, null, metadata !"_ZTS2EA"} ; [ DW_TAG_enumeration_type ] [EA] [line 1, size 32, align 32, offset 0] [def] [from ]
!4 = metadata !{metadata !5}
!5 = metadata !{metadata !"0x28\00EA_0\000"} ; [ DW_TAG_enumerator ] [EA_0 :: 0]
!6 = metadata !{metadata !7}
!7 = metadata !{metadata !"0x2e\00topA\00topA\00_Z4topA2EA\005\000\001\000\006\00256\000\005", metadata !1, metadata !8, metadata !9, null, void (i32)* @_Z4topA2EA, null, null, metadata !11} ; [ DW_TAG_subprogram ] [line 5] [def] [topA]
!8 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [a.cpp]
!9 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !10, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!10 = metadata !{null, metadata !"_ZTS2EA"}
!11 = metadata !{}
!12 = metadata !{metadata !"0x11\004\00clang version 3.5.0 (trunk 214102:214133) (llvm/trunk 214102:214132)\000\00\000\00\001", metadata !13, metadata !14, metadata !14, metadata !16, metadata !11, metadata !11} ; [ DW_TAG_compile_unit ] [b.cpp] [DW_LANG_C_plus_plus]
!13 = metadata !{metadata !"b.cpp", metadata !""}
!14 = metadata !{metadata !15}
!15 = metadata !{metadata !"0x4\00EA\001\0032\0032\000\000\000", metadata !13, null, null, metadata !4, null, null, metadata !"_ZTS2EA"} ; [ DW_TAG_enumeration_type ] [EA] [line 1, size 32, align 32, offset 0] [def] [from ]
!16 = metadata !{metadata !17}
!17 = metadata !{metadata !"0x2e\00topB\00topB\00_Z4topB2EA\005\000\001\000\006\00256\000\005", metadata !13, metadata !18, metadata !9, null, void (i32)* @_Z4topB2EA, null, null, metadata !11} ; [ DW_TAG_subprogram ] [line 5] [def] [topB]
!18 = metadata !{metadata !"0x29", metadata !13} ; [ DW_TAG_file_type ] [b.cpp]
!19 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
!20 = metadata !{i32 2, metadata !"Debug Info Version", i32 2}
!21 = metadata !{metadata !"clang version 3.5.0 (trunk 214102:214133) (llvm/trunk 214102:214132)"}
!22 = metadata !{metadata !"0x101\00sa\0016777221\000", metadata !7, metadata !8, metadata !"_ZTS2EA"} ; [ DW_TAG_arg_variable ] [sa] [line 5]
!23 = metadata !{i32 5, i32 14, metadata !7, null}
!24 = metadata !{i32 6, i32 1, metadata !7, null}
!25 = metadata !{metadata !"0x101\00sa\0016777221\000", metadata !17, metadata !18, metadata !"_ZTS2EA"} ; [ DW_TAG_arg_variable ] [sa] [line 5]
!26 = metadata !{i32 5, i32 14, metadata !17, null}
!27 = metadata !{i32 6, i32 1, metadata !17, null}