[llvm] LAA: scale strides using type-size (NFC) (PR #124529)

[Ramkumar Ramachandra via llvm-commits]

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@@ -1990,25 +1986,32 @@ MemoryDepChecker::getDependenceDistanceStrideAndSize(
     return MemoryDepChecker::Dependence::Unknown;
   }
 
-  uint64_t TypeByteSize = DL.getTypeAllocSize(ATy);
-  bool HasSameSize =
-      DL.getTypeStoreSizeInBits(ATy) == DL.getTypeStoreSizeInBits(BTy);
-  if (!HasSameSize)
-    TypeByteSize = 0;
+  TypeSize AStoreSz = DL.getTypeStoreSize(ATy),
+           BStoreSz = DL.getTypeStoreSize(BTy);
+
+  // Fail early if either store size is scalable.
+  if (AStoreSz.isScalable() || BStoreSz.isScalable())
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artagnon wrote:

It's actually dead code, since getPtrStride already checks for scalable vectors. Stripped now, thanks!

https://github.com/llvm/llvm-project/pull/124529