[Mlir-commits] [mlir] [MLIR][XeGPU] Add support for subgroup_id_range (PR #148661)

[Chao Chen]

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@@ -34,6 +34,26 @@ using namespace mlir;
 
 namespace {
 
+// Check if there is sg id range attached to the scf.if op.
+static bool isSgIdRangeSpecified(Operation *op, int64_t &startOfRange,
+                                 int64_t &endOfRange) {
+  Operation *parent = op->getParentOp();
+  // Find the outermost scf::IfOp with xegpu.sg_id_range.
+  while (parent) {
+    if (auto ifOp = dyn_cast<scf::IfOp>(parent)) {
+      if (auto attr = llvm::dyn_cast_or_null<xegpu::RangeAttr>(
+              ifOp->getAttr("sg_id_range"))) {
+        startOfRange = attr.getStart().getInt();
+        endOfRange = attr.getEnd().getInt();
+        break;
+      }
+    }
+    parent = parent->getParentOp();
+  }
+  // Return false if startOfRange is 0
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chencha3 wrote:

Why it returns false when startOfRange is 0? 

https://github.com/llvm/llvm-project/pull/148661