[llvm] [VPlan] Dispatch to multiple exit blocks via middle blocks. (PR #112138)

[David Sherwood via llvm-commits]

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@@ -68,6 +68,8 @@ bool VPRecipeBase::mayWriteToMemory() const {
     default:
       return true;
     }
+  case VPExpandSCEVSC:
----------------
david-arm wrote:

Is it necessary to add the VPExpandSCEVSC here and below for this patch? In https://github.com/llvm/llvm-project/commit/b27a332babde3fec55756d72bd5ed8fbe9c1194c#diff-6d0b73adfa9f8465923d2225ab6674ddcdeab71666f7a73dfaec7fa1246b3a1fL929 I managed to remove this and nothing broke.

https://github.com/llvm/llvm-project/pull/112138