[llvm] [SLP] Initial support for masked stores (PR #204893)

[Alexey Bataev via llvm-commits]

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@@ -32891,6 +33086,28 @@ bool SLPVectorizerPass::vectorizeStoreChains(BoUpSLP &R) {
            V2->getValueOperand()->getValueID();
   };
 
+  // Returns true if any two stores in the group are at consecutive (stride-1)
+  // addresses. Masked stores are disabled for the entire base-object group when
+  // this is true - consecutive vectorization is always preferred.
+  auto HasConsecutiveStores = [&](ArrayRef<StoreInst *> SIs) {
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alexey-bataev wrote:

But let's exit early, just on case

https://github.com/llvm/llvm-project/pull/204893