[Mlir-commits] [mlir] [MLIR][SCFToOpenMP] Fix crash when lowering vector reductions (PR #173978)

[Tom Eccles]

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@@ -261,54 +295,67 @@ static omp::DeclareReductionOp declareReduction(PatternRewriter &builder,
   // Match simple binary reductions that can be expressed with atomicrmw.
   Type type = reduce.getOperands()[reductionIndex].getType();
   Block &reduction = reduce.getReductions()[reductionIndex].front();
+
+  // Handle scalar element type extraction for vector bitwidth safety.
+  Type elType = type;
+  if (auto vecType = dyn_cast<VectorType>(type))
+    elType = vecType.getElementType();
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tblah wrote:

nit: perhaps this should be a helper function, as the same pattern repeats a lot.

https://github.com/llvm/llvm-project/pull/173978