[llvm] [InstCombine] Improve handling of `not` and free inversion. (PR #66787)

[Nikita Popov via llvm-commits]

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@@ -2106,6 +2106,99 @@ Instruction *InstCombinerImpl::visitGEPOfGEP(GetElementPtrInst &GEP,
   return nullptr;
 }
 
+Value *InstCombiner::getFreelyInverted(Value *V, bool WillInvertAllUses,
+                                       BuilderTy *Builder, unsigned Depth) {
+  using namespace llvm::PatternMatch;
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nikic wrote:

Can probably drop the `using namespace` now.

https://github.com/llvm/llvm-project/pull/66787