[llvm] [VPlan] Add initial pattern match implementation for VPInstruction. (PR #80563)

[Florian Hahn via llvm-commits]

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@@ -475,6 +474,7 @@ void VPlanTransforms::removeDeadRecipes(VPlan &Plan) {
                  [](VPValue *V) { return V->getNumUsers(); }))
         continue;
 
+      using namespace llvm::PatternMatch;
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fhahn wrote:

At the moment, the code here still uses the IR matcher. Using `llvm::PatternMatch` leads to conflicts with the matchers in `VPlanPatternMatch` (`m_Not` is defined in both). Alternatively could also rename to more verbose/cumbersome `m_VPNot`)

https://github.com/llvm/llvm-project/pull/80563