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Do not emit DW_AT_upper_bound and DW_AT_lower_bound for unbouded array.

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If lower bound is more then upper bound then consider it is an unbounded array.
An array is unbounded if non-zero lower bound is same as upper bound.
If lower bound and upper bound are zero than array has one element.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129156 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-04-08 21:55:10 +00:00
parent 90464131a3
commit fb6e8d6554
3 changed files with 50 additions and 4 deletions
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18
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -1237,15 +1237,27 @@ DwarfDebug::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV) {
/// constructSubrangeDIE - Construct subrange DIE from DISubrange.
void DwarfDebug::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();
DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
// The L value defines the lower bounds typically zero for C/C++. The H
// value is the upper bounds. Values are 64 bit. H - L + 1 is the size
// of the array. If L > H the array will be unbounded. If the L is
// non zero and same is H then also the array will be unbounded. If L is
// zero and H is zero then the array has one element and in such case do
// not emit lower bound.
if (L > H || (L == H && L != 0)) {
// This is an unbounded subrange.
Buffer.addChild(DW_Subrange);
return;
}
if (L)
addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
Buffer.addChild(DW_Subrange);
}