================
@@ -428,6 +429,52 @@ mlir::LogicalResult CIRGenFunction::emitBreakStmt(const
clang::BreakStmt &s) {
return mlir::success();
}
+const CaseStmt *CIRGenFunction::foldCaseStmt(const clang::CaseStmt &s,
+ mlir::Type condType,
+ mlir::ArrayAttr &value,
+ cir::CaseOpKind &kind) {
+ const CaseStmt *caseStmt = &s;
+ const CaseStmt *lastCase = &s;
+ SmallVector<mlir::Attribute, 4> caseEltValueListAttr;
+
+ // Fold cascading cases whenever possible to simplify codegen a bit.
+ while (caseStmt) {
+ lastCase = caseStmt;
+
+ auto intVal = caseStmt->getLHS()->EvaluateKnownConstInt(getContext());
+
+ if (auto *rhs = caseStmt->getRHS()) {
----------------
andykaylor wrote:
```suggestion
// If the case statement has an RHS value, it is representing a GNU
// case range statement, where LHS is the beginning of the range
// and RHS is the end of the range.
if (const Expr *rhs = caseStmt->getRHS()) {
```
https://github.com/llvm/llvm-project/pull/138003
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