[llvm] [libcxxabi] [lldb] [libcxx] [polly] [openmp] [compiler-rt] [flang] [libc] [mlir] [clang-tools-extra] [clang] [mlir][vector] Fix invalid `LoadOp` indices being created (PR #76292)

[Mehdi Amini via cfe-commits]

================
@@ -897,7 +921,8 @@ struct TransferOpConversion : public 
VectorToSCFPattern<OpTy> {
       } else {
         // It's safe to assume the mask buffer can be unpacked if the data
         // buffer was unpacked.
-        auto castedMaskType = *unpackOneDim(maskBufferType);
+        auto maskBufferType = dyn_cast<MemRefType>(maskBuffer.getType());
----------------
joker-eph wrote:

OK, but we're not checking the result: if this can't fail here by construction 
it should be a cast instead.

https://github.com/llvm/llvm-project/pull/76292
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