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; RUN: llc -O0 -mtriple=arm-apple-darwin < %s | grep DW_OP_breg
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; Use DW_OP_breg in variable's location expression if the variable is in a stack slot.
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%struct.SVal = type { i8 * , i32 }
define i32 @_Z3fooi4SVal ( i32 %i , %struct.SVal * noalias %location ) nounwind ssp {
entry:
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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call void @llvm.dbg.value ( metadata ! { i32 %i } , i64 0 , metadata !23 , metadata ! { i32 786690 } ) , !dbg !24
call void @llvm.dbg.value ( metadata ! { %struct.SVal * %location } , i64 0 , metadata !25 , metadata ! { i32 786690 } ) , !dbg !24
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%0 = icmp ne i32 %i , 0 , !dbg !27 ; <i1> [#uses=1]
br i1 %0 , label %bb , label %bb1 , !dbg !27
bb: ; preds = %entry
%1 = getelementptr inbounds %struct.SVal * %location , i32 0 , i32 1 , !dbg !29 ; <i32*> [#uses=1]
%2 = load i32 * %1 , align 8 , !dbg !29 ; <i32> [#uses=1]
%3 = add i32 %2 , %i , !dbg !29 ; <i32> [#uses=1]
br label %bb2 , !dbg !29
bb1: ; preds = %entry
%4 = getelementptr inbounds %struct.SVal * %location , i32 0 , i32 1 , !dbg !30 ; <i32*> [#uses=1]
%5 = load i32 * %4 , align 8 , !dbg !30 ; <i32> [#uses=1]
%6 = sub i32 %5 , 1 , !dbg !30 ; <i32> [#uses=1]
br label %bb2 , !dbg !30
bb2: ; preds = %bb1, %bb
%.0 = phi i32 [ %3 , %bb ] , [ %6 , %bb1 ] ; <i32> [#uses=1]
br label %return , !dbg !29
return: ; preds = %bb2
ret i32 %.0 , !dbg !29
}
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define linkonce_odr void @_ZN4SValC1Ev ( %struct.SVal * %this ) nounwind ssp align 2 {
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entry:
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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call void @llvm.dbg.value ( metadata ! { %struct.SVal * %this } , i64 0 , metadata !31 , metadata ! { i32 786690 } ) , !dbg !34
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%0 = getelementptr inbounds %struct.SVal * %this , i32 0 , i32 0 , !dbg !34 ; <i8**> [#uses=1]
store i8 * null , i8 * * %0 , align 8 , !dbg !34
%1 = getelementptr inbounds %struct.SVal * %this , i32 0 , i32 1 , !dbg !34 ; <i32*> [#uses=1]
store i32 0 , i32 * %1 , align 8 , !dbg !34
br label %return , !dbg !34
return: ; preds = %entry
ret void , !dbg !35
}
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
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declare void @llvm.dbg.declare ( metadata , metadata , metadata ) nounwind readnone
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define i32 @main ( ) nounwind ssp {
entry:
%0 = alloca %struct.SVal ; <%struct.SVal*> [#uses=3]
%v = alloca %struct.SVal ; <%struct.SVal*> [#uses=4]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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call void @llvm.dbg.declare ( metadata ! { %struct.SVal * %v } , metadata !38 , metadata ! { i32 786690 } ) , !dbg !41
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call void @_ZN4SValC1Ev ( %struct.SVal * %v ) nounwind , !dbg !41
%1 = getelementptr inbounds %struct.SVal * %v , i32 0 , i32 1 , !dbg !42 ; <i32*> [#uses=1]
store i32 1 , i32 * %1 , align 8 , !dbg !42
%2 = getelementptr inbounds %struct.SVal * %0 , i32 0 , i32 0 , !dbg !43 ; <i8**> [#uses=1]
%3 = getelementptr inbounds %struct.SVal * %v , i32 0 , i32 0 , !dbg !43 ; <i8**> [#uses=1]
%4 = load i8 * * %3 , align 8 , !dbg !43 ; <i8*> [#uses=1]
store i8 * %4 , i8 * * %2 , align 8 , !dbg !43
%5 = getelementptr inbounds %struct.SVal * %0 , i32 0 , i32 1 , !dbg !43 ; <i32*> [#uses=1]
%6 = getelementptr inbounds %struct.SVal * %v , i32 0 , i32 1 , !dbg !43 ; <i32*> [#uses=1]
%7 = load i32 * %6 , align 8 , !dbg !43 ; <i32> [#uses=1]
store i32 %7 , i32 * %5 , align 8 , !dbg !43
%8 = call i32 @_Z3fooi4SVal ( i32 2 , %struct.SVal * noalias %0 ) nounwind , !dbg !43 ; <i32> [#uses=0]
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call void @llvm.dbg.value ( metadata ! { i32 %8 } , i64 0 , metadata !44 , metadata ! { i32 786690 } ) , !dbg !43
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br label %return , !dbg !45
return: ; preds = %entry
ret i32 0 , !dbg !45
}
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.value ( metadata , i64 , metadata , metadata ) nounwind readnone
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!llvm.dbg.cu = ! { !3 }
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!llvm.module.flags = ! { !49 }
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!0 = metadata ! { i32 786478 , metadata !48 , metadata !1 , metadata !"SVal" , metadata !"SVal" , metadata !"" , i32 11 , metadata !14 , i1 false , i1 false , i32 0 , i32 0 , null , i1 false , i1 false , null , null , null , null , i32 0 } ; [ DW_TAG_subprogram ]
!1 = metadata ! { i32 786451 , metadata !48 , null , metadata !"SVal" , i32 1 , i64 128 , i64 64 , i64 0 , i32 0 , null , metadata !4 , i32 0 , null , null , null } ; [ DW_TAG_structure_type ] [SVal] [line 1, size 128, align 64, offset 0] [def] [from ]
!2 = metadata ! { i32 786473 , metadata !48 } ; [ DW_TAG_file_type ]
!3 = metadata ! { i32 786449 , metadata !48 , i32 4 , metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)" , i1 false , metadata !"" , i32 0 , metadata !47 , metadata !47 , metadata !46 , metadata !47 , metadata !47 , metadata !"" , i32 1 } ; [ DW_TAG_compile_unit ]
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!4 = metadata ! { metadata !5 , metadata !7 , metadata !0 , metadata !9 }
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!5 = metadata ! { i32 786445 , metadata !48 , metadata !1 , metadata !"Data" , i32 7 , i64 64 , i64 64 , i64 0 , i32 0 , metadata !6 } ; [ DW_TAG_member ]
!6 = metadata ! { i32 786447 , metadata !48 , null , metadata !"" , i32 0 , i64 64 , i64 64 , i64 0 , i32 0 , null } ; [ DW_TAG_pointer_type ]
!7 = metadata ! { i32 786445 , metadata !48 , metadata !1 , metadata !"Kind" , i32 8 , i64 32 , i64 32 , i64 64 , i32 0 , metadata !8 } ; [ DW_TAG_member ]
!8 = metadata ! { i32 786468 , metadata !48 , null , metadata !"unsigned int" , i32 0 , i64 32 , i64 32 , i64 0 , i32 0 , i32 7 } ; [ DW_TAG_base_type ]
!9 = metadata ! { i32 786478 , metadata !48 , metadata !1 , metadata !"~SVal" , metadata !"~SVal" , metadata !"" , i32 12 , metadata !10 , i1 false , i1 false , i32 0 , i32 0 , null , i1 false , i1 false , null , null , null , null , i32 0 } ; [ DW_TAG_subprogram ]
!10 = metadata ! { i32 786453 , metadata !48 , 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 , metadata !13 }
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!12 = metadata ! { i32 786447 , metadata !48 , null , metadata !"" , i32 0 , i64 64 , i64 64 , i64 0 , i32 64 , metadata !1 } ; [ DW_TAG_pointer_type ]
!13 = metadata ! { i32 786468 , metadata !48 , null , metadata !"int" , i32 0 , i64 32 , i64 32 , i64 0 , i32 0 , i32 5 } ; [ DW_TAG_base_type ]
!14 = metadata ! { i32 786453 , metadata !48 , null , metadata !"" , i32 0 , i64 0 , i64 0 , i64 0 , i32 0 , null , metadata !15 , i32 0 , null , null , null } ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!15 = metadata ! { null , metadata !12 }
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!16 = metadata ! { i32 786478 , metadata !48 , metadata !1 , metadata !"SVal" , metadata !"SVal" , metadata !"_ZN4SValC1Ev" , i32 11 , metadata !14 , i1 false , i1 true , i32 0 , i32 0 , null , i1 false , i1 false , void ( %struct.SVal * ) * @_ZN4SValC1Ev , null , null , null , i32 0 } ; [ DW_TAG_subprogram ]
!17 = metadata ! { i32 786478 , metadata !48 , metadata !2 , metadata !"foo" , metadata !"foo" , metadata !"_Z3fooi4SVal" , i32 16 , metadata !18 , i1 false , i1 true , i32 0 , i32 0 , null , i1 false , i1 false , i32 ( i32 , %struct.SVal * ) * @_Z3fooi4SVal , null , null , null , i32 0 } ; [ DW_TAG_subprogram ]
!18 = metadata ! { i32 786453 , metadata !48 , null , metadata !"" , i32 0 , i64 0 , i64 0 , i64 0 , i32 0 , null , metadata !19 , i32 0 , null , null , null } ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!19 = metadata ! { metadata !13 , metadata !13 , metadata !1 }
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!20 = metadata ! { i32 786478 , metadata !48 , metadata !2 , metadata !"main" , metadata !"main" , metadata !"main" , i32 23 , metadata !21 , i1 false , i1 true , i32 0 , i32 0 , null , i1 false , i1 false , i32 ( ) * @main , null , null , null , i32 0 } ; [ DW_TAG_subprogram ]
!21 = metadata ! { i32 786453 , metadata !48 , null , metadata !"" , i32 0 , i64 0 , i64 0 , i64 0 , i32 0 , null , metadata !22 , i32 0 , null , null , null } ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!22 = metadata ! { metadata !13 }
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!23 = metadata ! { i32 786689 , metadata !17 , metadata !"i" , metadata !2 , i32 16 , metadata !13 , i32 0 , i32 0 } ; [ DW_TAG_arg_variable ]
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!24 = metadata ! { i32 16 , i32 0 , metadata !17 , null }
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!25 = metadata ! { i32 786689 , metadata !17 , metadata !"location" , metadata !2 , i32 16 , metadata !26 , i32 0 , i32 0 } ; [ DW_TAG_arg_variable ]
!26 = metadata ! { i32 786448 , metadata !48 , metadata !2 , metadata !"SVal" , i32 0 , i64 64 , i64 64 , i64 0 , i32 0 , metadata !1 } ; [ DW_TAG_reference_type ]
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!27 = metadata ! { i32 17 , i32 0 , metadata !28 , null }
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!28 = metadata ! { i32 786443 , metadata !2 , metadata !17 , i32 16 , i32 0 , i32 2 } ; [ DW_TAG_lexical_block ]
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!29 = metadata ! { i32 18 , i32 0 , metadata !28 , null }
!30 = metadata ! { i32 20 , i32 0 , metadata !28 , null }
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!31 = metadata ! { i32 786689 , metadata !16 , metadata !"this" , metadata !2 , i32 11 , metadata !32 , i32 0 , i32 0 } ; [ DW_TAG_arg_variable ]
!32 = metadata ! { i32 786470 , metadata !48 , metadata !2 , metadata !"" , i32 0 , i64 64 , i64 64 , i64 0 , i32 64 , metadata !33 } ; [ DW_TAG_const_type ]
!33 = metadata ! { i32 786447 , metadata !48 , metadata !2 , metadata !"" , i32 0 , i64 64 , i64 64 , i64 0 , i32 0 , metadata !1 } ; [ DW_TAG_pointer_type ]
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!34 = metadata ! { i32 11 , i32 0 , metadata !16 , null }
!35 = metadata ! { i32 11 , i32 0 , metadata !36 , null }
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!36 = metadata ! { i32 786443 , metadata !48 , metadata !37 , i32 11 , i32 0 , i32 1 } ; [ DW_TAG_lexical_block ]
!37 = metadata ! { i32 786443 , metadata !48 , metadata !16 , i32 11 , i32 0 , i32 0 } ; [ DW_TAG_lexical_block ]
!38 = metadata ! { i32 786688 , metadata !39 , metadata !"v" , metadata !2 , i32 24 , metadata !1 , i32 0 , i32 0 } ; [ DW_TAG_auto_variable ]
!39 = metadata ! { i32 786443 , metadata !48 , metadata !40 , i32 23 , i32 0 , i32 4 } ; [ DW_TAG_lexical_block ]
!40 = metadata ! { i32 786443 , metadata !48 , metadata !20 , i32 23 , i32 0 , i32 3 } ; [ DW_TAG_lexical_block ]
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!41 = metadata ! { i32 24 , i32 0 , metadata !39 , null }
!42 = metadata ! { i32 25 , i32 0 , metadata !39 , null }
!43 = metadata ! { i32 26 , i32 0 , metadata !39 , null }
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!44 = metadata ! { i32 786688 , metadata !39 , metadata !"k" , metadata !2 , i32 26 , metadata !13 , i32 0 , i32 0 } ; [ DW_TAG_auto_variable ]
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!45 = metadata ! { i32 27 , i32 0 , metadata !39 , null }
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!46 = metadata ! { metadata !16 , metadata !17 , metadata !20 }
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!47 = metadata ! { }
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!48 = metadata ! { metadata !"small.cc" , metadata !"/Users/manav/R8248330" }
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!49 = metadata ! { i32 1 , metadata !"Debug Info Version" , i32 1 }
