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While calculating original type size for a derived type, handle type variants encoded as DIDerivedType appropriately. 

This improves bitfield support.

llvm-svn: 86073
This commit is contained in:
Devang Patel 2009-11-04 23:48:00 +00:00
parent a5beced60e
commit f05d57283e
2 changed files with 13 additions and 9 deletions
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18
llvm/lib/Analysis/DebugInfo.cpp
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@ -401,12 +401,18 @@ bool DIVariable::Verify() const {
/// getOriginalTypeSize - If this type is derived from a base type then
/// return base type size.
uint64_t DIDerivedType::getOriginalTypeSize() const {
DIType BT = getTypeDerivedFrom();
if (!BT.isNull() && BT.isDerivedType())
return DIDerivedType(BT.getNode()).getOriginalTypeSize();
if (BT.isNull())
return getSizeInBits();
return BT.getSizeInBits();
unsigned Tag = getTag();
if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
Tag == dwarf::DW_TAG_restrict_type) {
DIType BaseType = getTypeDerivedFrom();
if (BaseType.isDerivedType())
return DIDerivedType(BaseType.getNode()).getOriginalTypeSize();
else
return BaseType.getSizeInBits();
}
return getSizeInBits();
}
/// describes - Return true if this subprogram provides debugging

4
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1141,9 +1141,7 @@ DIE *DwarfDebug::CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT){
AddUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
uint64_t Size = DT.getSizeInBits();
uint64_t FieldSize = Size;
if (DT.getTypeDerivedFrom().getTag() != dwarf::DW_TAG_array_type)
FieldSize = DT.getOriginalTypeSize();
uint64_t FieldSize = DT.getOriginalTypeSize();
if (Size != FieldSize) {
// Handle bitfield.