[libc] [clang-tools-extra] [flang] [llvm] [lldb] [clang] [libcxx] [compiler-rt] [lld] [VPlan] Implement cloning of VPlans. (PR #73158)

[via cfe-commits]

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@@ -1594,6 +1657,13 @@ class VPWidenPHIRecipe : public VPHeaderPHIRecipe {
       addOperand(Start);
   }
 
+  VPRecipeBase *clone() override {
+    auto *Res = new VPWidenPHIRecipe(cast<PHINode>(getUnderlyingInstr()),
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ayalz wrote:

Better mark it unreachable than have untested dead code, potentially 
misconsidered live?

https://github.com/llvm/llvm-project/pull/73158
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