================
@@ -546,11 +567,51 @@ mlir::Value CIRGenFunction::emitX86BuiltinExpr(unsigned
builtinID,
case X86::BI__builtin_ia32_kshiftliqi:
case X86::BI__builtin_ia32_kshiftlihi:
case X86::BI__builtin_ia32_kshiftlisi:
- case X86::BI__builtin_ia32_kshiftlidi:
+ case X86::BI__builtin_ia32_kshiftlidi: {
+ unsigned shiftVal =
+ ops[1].getDefiningOp<cir::ConstantOp>().getIntValue().getZExtValue() &
+ 0xff;
+ auto numElems = cast<cir::IntType>(ops[0].getType()).getWidth();
+
+ if (shiftVal >= numElems)
+ return builder.getNullValue(ops[0].getType(),
getLoc(expr->getExprLoc()));
----------------
andykaylor wrote:
The tests don't exercise this case.
https://github.com/llvm/llvm-project/pull/168591
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