================
@@ -1430,6 +1430,31 @@ mlir::LogicalResult
CIRToLLVMCastOpLowering::matchAndRewrite(
return mlir::success();
}
+mlir::LogicalResult CIRToLLVMBuiltinIntCastOpLowering::matchAndRewrite(
+ cir::BuiltinIntCastOp op, OpAdaptor adaptor,
+ mlir::ConversionPatternRewriter &rewriter) const {
+ // Both the CIR integer and the builtin integer/index lower to LLVM integer
+ // types, so this cast becomes an integer resize. Signedness is taken from
+ // the CIR integer side (the builtin/index side is treated as signless).
+ bool isUnsigned = true;
+ if (auto cirSrc = mlir::dyn_cast<cir::IntType>(op.getSrc().getType()))
+ isUnsigned = cirSrc.isUnsigned();
+ else if (auto cirDst = mlir::dyn_cast<cir::IntType>(op.getType()))
+ isUnsigned = cirDst.isUnsigned();
+
+ mlir::Value llvmSrc = adaptor.getSrc();
+ mlir::Type llvmDstTy = getTypeConverter()->convertType(op.getType());
+ auto srcIntTy = mlir::cast<mlir::IntegerType>(llvmSrc.getType());
+ auto dstIntTy = mlir::cast<mlir::IntegerType>(llvmDstTy);
+
+ // For equal widths getLLVMIntCast returns the source unchanged, which makes
+ // the common same-width cast a no-op.
----------------
jsjodin wrote:
>From what I understand depending on what the index type is there may be a need
>for a cast. For most targets the sizes are the same.
https://github.com/llvm/llvm-project/pull/201592
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