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Eliminate a divide-by-8 in BuildVMIClassTypeInfo() by using CharUnits for

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the base offset. No change in functionality intended.

llvm-svn: 129179
This commit is contained in:
Ken Dyck 2011-04-09 01:09:56 +00:00
parent 6417e35568
commit 499e93d7ee
1 changed files with 5 additions and 4 deletions
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9
clang/lib/CodeGen/CGRTTI.cpp
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@ -877,15 +877,16 @@ void RTTIBuilder::BuildVMIClassTypeInfo(const CXXRecordDecl *RD) {
// For a non-virtual base, this is the offset in the object of the base
// subobject. For a virtual base, this is the offset in the virtual table of
// the virtual base offset for the virtual base referenced (negative).
CharUnits Offset;
if (Base->isVirtual())
OffsetFlags =
CGM.getVTables().getVirtualBaseOffsetOffset(RD, BaseDecl).getQuantity();
Offset =
CGM.getVTables().getVirtualBaseOffsetOffset(RD, BaseDecl);
else {
const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD);
OffsetFlags = Layout.getBaseClassOffsetInBits(BaseDecl) / 8;
Offset = Layout.getBaseClassOffset(BaseDecl);
};
OffsetFlags <<= 8;
OffsetFlags = Offset.getQuantity() << 8;
// The low-order byte of __offset_flags contains flags, as given by the
// masks from the enumeration __offset_flags_masks.