fixup

Author: alexbaden

third_party/intel/lib/TritonIntelGPUTransforms/AccelerateMatmul.cpp

@@ -120,14 +120,13 @@ class BlockedToDPAS : public OpRewritePattern<tt::DotOp> {
 
     SmallVector<unsigned> order = {0, 1};
     Operation *aOp = a.getDefiningOp();
-    if (isa<ttg::ConvertLayoutOp>(aOp)) {
+    if (aOp && isa<ttg::ConvertLayoutOp>(aOp)) {
       auto valueToConvert = aOp->getOperand(0);
       aOp = valueToConvert.getDefiningOp();
     }
     if (aOp && isa<tt::LoadOp>(aOp)) {
-      Attribute layout;
       assert(aOp->getNumResults() == 1);
-      layout =
+      Attribute layout =
           cast<RankedTensorType>(aOp->getResult(0).getType()).getEncoding();
       order = triton::gpu::getOrder(layout);
     }