[llvm] [LAA] Add initial support for non-power-of-2 store-load forwarding distance (PR #137873)

[Alexey Bataev via llvm-commits]

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@@ -2985,8 +3023,9 @@ LoopAccessInfo::LoopAccessInfo(Loop *L, ScalarEvolution *SE,
     MaxTargetVectorWidthInBits =
         TTI->getRegisterBitWidth(TargetTransformInfo::RGK_FixedWidthVector) * 2;
 
-  DepChecker = std::make_unique<MemoryDepChecker>(*PSE, L, SymbolicStrides,
-                                                  MaxTargetVectorWidthInBits);
+  DepChecker = std::make_unique<MemoryDepChecker>(
+      *PSE, L, SymbolicStrides, MaxTargetVectorWidthInBits,
+      TTI && TTI->hasActiveVectorLength(0, nullptr, Align()));
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alexey-bataev wrote:

PowerPC introduced this and supports for Loads/Stores. RISC-V supports all instructions, so it does not matter

https://github.com/llvm/llvm-project/pull/137873