[clang] [CIR] Implement support for MatrixSingleSubstract expr (PR #232079)

[Erich Keane via cfe-commits]

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@@ -4521,6 +4521,26 @@ OpFoldResult cir::VecTernaryOp::fold(FoldAdaptor adaptor) {
       vecTy, mlir::ArrayAttr::get(getContext(), elements));
 }
 
+//===----------------------------------------------------------------------===//
+// MatrixExtractOp
+//===----------------------------------------------------------------------===//
+
+LogicalResult MatrixExtractOp::inferReturnTypes(
+    MLIRContext *context, std::optional<Location> location, ValueRange operands,
+    DictionaryAttr attributes, PropertyRef properties, RegionRange regions,
+    SmallVectorImpl<Type> &inferredReturnTypes) {
+  auto matrixType = dyn_cast<cir::MatrixType>(operands[0].getType());
+  if (operands.size() == 3) {
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erichkeane wrote:

Rather than this, I'd rather we check if 'Rows' is provided?  It would be more clear to me/be future proof for when/if we add an extra thing.

https://github.com/llvm/llvm-project/pull/232079