[mlir][affine] Fix crash in mlir::affine::getForInductionVarOwner()

[DarshanRamakant]

This change fixes a crash when getOwner()->getParent() is a nullptr

[llvmbot]

@llvm/pr-subscribers-mlir

@llvm/pr-subscribers-mlir-affine

Author: None (DarshanRamakant)

Changes

This change fixes a crash when getOwner()->getParent() is a nullptr

---

Full diff: https://github.com/llvm/llvm-project/pull/102625.diff

1 Files Affected:

• (modified) mlir/lib/Dialect/Affine/IR/AffineOps.cpp (+1-1)

diff --git a/mlir/lib/Dialect/Affine/IR/AffineOps.cpp b/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
index 35d5f53aad241f..2d4d23ba712bca 100644
--- a/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
+++ b/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
@@ -2562,7 +2562,7 @@ bool mlir::affine::isAffineInductionVar(Value val) {
 
 AffineForOp mlir::affine::getForInductionVarOwner(Value val) {
   auto ivArg = llvm::dyn_cast<BlockArgument>(val);
-  if (!ivArg || !ivArg.getOwner())
+  if (!ivArg || !ivArg.getOwner() || !ivArg.getOwner()->getParent())
     return AffineForOp();
   auto *containingInst = ivArg.getOwner()->getParent()->getParentOp();
   if (auto forOp = dyn_cast<AffineForOp>(containingInst))