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DISubrange supports unsigned lower/upper array bounds, so let's not fake it in the end while emitting DWARF. If a FE needs to encode signed lower/upper array bounds then we need to extend DISubrange or ad DISignedSubrange.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-11-17 23:43:15 +00:00
parent 2e7fb2f736
commit ce35d8b5a1
3 changed files with 43 additions and 6 deletions
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4
include/llvm/Analysis/DebugInfo.h
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@ -135,8 +135,8 @@ namespace llvm {
public:
explicit DISubrange(const MDNode *N = 0) : DIDescriptor(N) {}
int64_t getLo() const { return (int64_t)getUInt64Field(1); }
int64_t getHi() const { return (int64_t)getUInt64Field(2); }
uint64_t getLo() const { return getUInt64Field(1); }
uint64_t getHi() const { return getUInt64Field(2); }
};
/// DIArray - This descriptor holds an array of descriptors.

8
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
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@ -1154,8 +1154,8 @@ void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
int64_t L = SR.getLo();
int64_t H = SR.getHi();
uint64_t L = SR.getLo();
uint64_t H = SR.getHi();
// The L value defines the lower bounds which is typically zero for C/C++. The
// H value is the upper bounds. Values are 64 bit. H - L + 1 is the size
@ -1168,8 +1168,8 @@ void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy)
return;
}
if (L)
addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
Buffer.addChild(DW_Subrange);
}

37
test/CodeGen/X86/dbg-subrange.ll Normal file
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@ -0,0 +1,37 @@
; RUN: llc -O0 < %s | FileCheck %s
; Radar 10464995
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-macosx10.7.2"
@s = common global [4294967296 x i8] zeroinitializer, align 16
;CHECK: .long 4294967295
define void @bar() nounwind uwtable ssp {
entry:
store i8 97, i8* getelementptr inbounds ([4294967296 x i8]* @s, i32 0, i64 0), align 1, !dbg !18
ret void, !dbg !20
}
!llvm.dbg.cu = !{!0}
!0 = metadata !{i32 720913, i32 0, i32 12, metadata !"small.c", metadata !"/private/tmp", metadata !"clang version 3.1 (trunk 144833)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !11} ; [ DW_TAG_compile_unit ]
!1 = metadata !{metadata !2}
!2 = metadata !{i32 0}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !5}
!5 = metadata !{i32 720942, i32 0, metadata !6, metadata !"bar", metadata !"bar", metadata !"", metadata !6, i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, void ()* @bar, null, null, metadata !9} ; [ DW_TAG_subprogram ]
!6 = metadata !{i32 720937, metadata !"small.c", metadata !"/private/tmp", null} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
!8 = metadata !{null}
!9 = metadata !{metadata !10}
!10 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
!11 = metadata !{metadata !12}
!12 = metadata !{metadata !13}
!13 = metadata !{i32 720948, i32 0, null, metadata !"s", metadata !"s", metadata !"", metadata !6, i32 2, metadata !14, i32 0, i32 1, [4294967296 x i8]* @s} ; [ DW_TAG_variable ]
!14 = metadata !{i32 720897, null, metadata !"", null, i32 0, i64 34359738368, i64 8, i32 0, i32 0, metadata !15, metadata !16, i32 0, i32 0} ; [ DW_TAG_array_type ]
!15 = metadata !{i32 720932, null, metadata !"char", null, i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
!16 = metadata !{metadata !17}
!17 = metadata !{i32 720929, i64 0, i64 4294967295} ; [ DW_TAG_subrange_type ]
!18 = metadata !{i32 5, i32 3, metadata !19, null}
!19 = metadata !{i32 720907, metadata !5, i32 4, i32 1, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
!20 = metadata !{i32 6, i32 1, metadata !19, null}