[llvm] [GVN] Teach GVN simple masked load/store forwarding (PR #157689)

[David Sherwood via llvm-commits]

================
@@ -2734,6 +2775,11 @@ bool GVNPass::processInstruction(Instruction *I) {
     return false;
   }
 
+  if (auto *II = dyn_cast<IntrinsicInst>(I))
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david-arm wrote:

I think you can simplify this a little by doing something like:

```
  if (match(I, m_Intrinsic<Intrinsic::masked_load>()) && processMaskedLoad(cast<IntrinsicInst>(I)))
    return true;
```

https://github.com/llvm/llvm-project/pull/157689