[llvm] [LAA] Prepare to handle diff type sizes (NFC) (PR #122318)

[Florian Hahn via llvm-commits]

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@@ -1949,17 +1949,21 @@ static bool isSafeDependenceDistance(const DataLayout &DL, ScalarEvolution &SE,
 
 /// Check the dependence for two accesses with the same stride \p Stride.
 /// \p Distance is the positive distance in bytes, and \p TypeByteSize is type
-/// size in bytes.
+/// size of source and sink in bytes.
+/// TODO: Relax HasSameSize check in caller.
 ///
 /// \returns true if they are independent.
-static bool areStridedAccessesIndependent(uint64_t Distance, uint64_t Stride,
-                                          uint64_t TypeByteSize) {
+static bool
+areStridedAccessesIndependent(uint64_t Distance, uint64_t Stride,
+                              std::pair<uint64_t, uint64_t> TypeByteSize) {
   assert(Stride > 1 && "The stride must be greater than 1");
-  assert(TypeByteSize > 0 && "The type size in byte must be non-zero");
+  assert(TypeByteSize.first > 0 && TypeByteSize.second > 0 &&
+         "The type size in byte must be non-zero");
   assert(Distance > 0 && "The distance must be non-zero");
 
-  // Skip if the distance is not multiple of type byte size.
-  if (Distance % TypeByteSize)
+  // Skip if the distance is not multiple of type byte size of either source or
+  // sink.
+  if (Distance % TypeByteSize.first || Distance % TypeByteSize.second)
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fhahn wrote:

For now better to keep the original code in the NFC patch to keep the unrelated changes out of the diff?

https://github.com/llvm/llvm-project/pull/122318