================
@@ -1971,10 +1906,24 @@ CIRGenFunction::emitX86BuiltinExpr(unsigned builtinID,
const CallExpr *expr) {
}
case X86::BI__shiftleft128:
case X86::BI__shiftright128: {
- cgm.errorNYI(expr->getSourceRange(),
- std::string("unimplemented X86 builtin call: ") +
- getContext().BuiltinInfo.getName(builtinID));
- return mlir::Value{};
+ // Determine if left or right shift
+ bool isRight = (builtinID == X86::BI__shiftright128);
+
+ // Flip low/high ops and zero-extend amount to matching type.
+ // shiftleft128(Low, High, Amt) -> fshl(High, Low, Amt)
+ // shiftright128(Low, High, Amt) -> fshr(High, Low, Amt)
+ std::swap(ops[0], ops[1]);
+
+ // Zero-extend shift amount to i64 if needed
+ auto amtTy = mlir::cast<cir::IntType>(ops[2].getType());
+ auto i64Ty = builder.getUInt64Ty();
----------------
andykaylor wrote:
```suggestion
cir::IntType i64Ty = builder.getUInt64Ty();
```
https://github.com/llvm/llvm-project/pull/175049
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