[Mlir-commits] [mlir] [MLIR][XeVM] Remove xevm to llvm from convert to llvm (PR #175672)

[Sang Ik Lee]

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@@ -858,6 +858,99 @@ class SubgroupOpWorkitemOpToOCLPattern : public OpConversionPattern<OpType> {
   }
 };
 
+static bool isExtractingContiguousSlice(LLVM::ShuffleVectorOp op) {
+  if (op.getV1() != op.getV2())
+    return false;
+  auto maskAttr = op.getMask();
+  int64_t firstIndex = maskAttr[0];
+  for (int64_t i = 1; i < static_cast<int64_t>(maskAttr.size()); ++i) {
+    int64_t index = maskAttr[i];
+    if (index != firstIndex + i)
+      return false;
+  }
+  return true;
+}
+
+// Input vector of a shuffle vector op extracting a contiguous slice is an
+// illegal vector in SPIRV kernel if the vector size is > 16 elements.
+// To legalize this case, keep applying the following transformations until no
+// more match:
+//   1. keep hoisting the shuffle vector op past unary element-wise operations
+//       start with fpext, fptrunc and bitcast for now.
+//   2. merge with another shuffle vector op
+//   3. merge with load as a smaller load
+class HandleVectorExtractPattern
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silee2 wrote:

Forgot to push test case. Pushed test case now.

https://github.com/llvm/llvm-project/pull/175672