[Mlir-commits] [mlir] [mlir][EmitC] Add rank-0 MemRef conversion (PR #205774)

[Gil Rapaport]

================
@@ -280,6 +289,35 @@ struct ConvertCopy final : public OpConversionPattern<memref::CopyOp> {
       return rewriter.notifyMatchFailure(
           loc, "incompatible target memref type for EmitC conversion");
 
+    if (srcMemrefType.getRank() == 0) {
+      assert(targetMemrefType.getRank() == 0 &&
+             "target must have same rank as source");
+      Type elementType =
+          getTypeConverter()->convertType(srcMemrefType.getElementType());
+      if (!elementType)
+        return rewriter.notifyMatchFailure(loc, "cannot convert element type");
+
+      Value srcPtr = getMemRefPointer(operands.getSource());
+      Value targetPtr = getMemRefPointer(operands.getTarget());
+      if (!srcPtr || !targetPtr)
+        return rewriter.notifyMatchFailure(loc, "expected pointer operands");
+
+      Value zeroIndex = emitc::ConstantOp::create(
+          rewriter, loc, rewriter.getIndexType(), rewriter.getIndexAttr(0));
+      auto srcLValue = emitc::SubscriptOp::create(
+          rewriter, loc, cast<TypedValue<emitc::PointerType>>(srcPtr),
+          zeroIndex);
+      auto value = emitc::LoadOp::create(rewriter, loc, elementType,
----------------
aniragil wrote:

```suggestion
      Value value = emitc::LoadOp::create(rewriter, loc, elementType,
```

https://github.com/llvm/llvm-project/pull/205774