================
@@ -306,3 +320,71 @@ CIRGenTypes::computeRecordLayout(const RecordDecl *rd,
cir::RecordType *ty) {
// TODO: implement verification
return rl;
}
+
+void CIRRecordLowering::lowerUnion() {
+ CharUnits layoutSize = astRecordLayout.getSize();
+ mlir::Type storageType = nullptr;
+ bool seenNamedMember = false;
+
+ // Iterate through the fields setting bitFieldInfo and the Fields array. Also
+ // locate the "most appropriate" storage type. The heuristic for finding the
+ // storage type isn't necessary, the first (non-0-length-bitfield) field's
+ // type would work fine and be simpler but would be different than what we've
+ // been doing and cause lit tests to change.
+ for (const FieldDecl *field : recordDecl->fields()) {
+ mlir::Type fieldType;
+ if (field->isBitField())
+ cirGenTypes.getCGModule().errorNYI(recordDecl->getSourceRange(),
+ "bitfields in lowerUnion");
+ else
+ fieldType = getStorageType(field);
+
+ fields[field->getCanonicalDecl()] = 0;
----------------
el-ev wrote:
Renamed them to `fieldIdxMap`
https://github.com/llvm/llvm-project/pull/137501
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