[Mlir-commits] [mlir] [mlir] fix affine-loop-fusion has a crash (#76281) (PR #76351)

[llvmlistbot at llvm.org]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
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@llvm/pr-subscribers-mlir-affine

Author: long.chen (lipracer)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/76351.diff


1 Files Affected:

- (modified) mlir/lib/Dialect/Affine/Transforms/LoopFusion.cpp (+2-1) 


``````````diff
diff --git a/mlir/lib/Dialect/Affine/Transforms/LoopFusion.cpp b/mlir/lib/Dialect/Affine/Transforms/LoopFusion.cpp
index 66d921b4889f59..2140ff66b1a676 100644
--- a/mlir/lib/Dialect/Affine/Transforms/LoopFusion.cpp
+++ b/mlir/lib/Dialect/Affine/Transforms/LoopFusion.cpp
@@ -205,7 +205,8 @@ static bool isEscapingMemref(Value memref, Block *block) {
   // (e.g., call ops, alias creating ops, etc.).
   return llvm::any_of(memref.getUsers(), [&](Operation *user) {
     // Ignore users outside of `block`.
-    if (block->getParent()->findAncestorOpInRegion(*user)->getBlock() != block)
+    auto ancestorOp = block->getParent()->findAncestorOpInRegion(*user);
+    if (!ancestorOp || ancestorOp->getBlock() != block)
       return false;
     return !isa<AffineMapAccessInterface>(*user);
   });

``````````

</details>


https://github.com/llvm/llvm-project/pull/76351