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Add a 'count' field to the DWARF subrange.

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The count field is necessary because there isn't a difference between the 'lo'
and 'hi' attributes for a one-element array and a zero-element array. When the
count is '0', we know that this is a zero-element array. When it's >=1, then
it's a normal constant sized array. When it's -1, then the array is unbounded.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169218 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2012-12-04 06:20:49 +00:00
parent 319d594e22
commit a7645a3c66
19 changed files with 158 additions and 18 deletions
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4
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
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@@ -1252,6 +1252,7 @@ void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
uint64_t L = SR.getLo();
uint64_t H = SR.getHi();
int64_t Count = SR.getCount();
// 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
@@ -1265,7 +1266,8 @@ void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
}
if (L)
addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
if (H > 0 || Count != 0)
addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
Buffer.addChild(DW_Subrange);
}