maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Handle zero width bit fields in unions correctly (by ignoring them). 

llvm-svn: 76847
This commit is contained in:
Anders Carlsson 2009-07-23 04:00:39 +00:00
parent 697f65943d
commit f814ee6003
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
clang/lib/CodeGen/CGRecordLayoutBuilder.cpp
View File

@ -160,6 +160,15 @@ void CGRecordLayoutBuilder::LayoutUnion(const RecordDecl *D) {
FieldEnd = D->field_end(); Field != FieldEnd; ++Field, ++FieldNo) {
assert(Layout.getFieldOffset(FieldNo) == 0 &&
"Union field offset did not start at the beginning of record!");
if (Field->isBitField()) {
uint64_t FieldSize =
Field->getBitWidth()->EvaluateAsInt(Types.getContext()).getZExtValue();
// Ignore zero sized bit fields.
if (FieldSize == 0)
continue;
}
const llvm::Type *FieldTy =
Types.ConvertTypeForMemRecursive(Field->getType());