[llvm] [InstCombine] Replace an integer comparison of a `phi` node with multiple `ucmp`/`scmp` operands and a constant with `phi` of individual comparisons of original intrinsic's arguments (PR #107769)

[Nikita Popov via llvm-commits]

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@@ -1857,30 +1883,14 @@ Instruction *InstCombinerImpl::foldOpIntoPhi(Instruction &I, PHINode *PN) {
   NewPN->takeName(PN);
   NewPN->setDebugLoc(PN->getDebugLoc());
 
-  // If we are going to have to insert a new computation, do so right before the
-  // predecessor's terminator.
-  Instruction *Clone = nullptr;
-  if (NonSimplifiedBB) {
-    Clone = I.clone();
-    for (Use &U : Clone->operands()) {
-      if (U == PN)
-        U = NonSimplifiedInVal;
-      else
-        U = U->DoPHITranslation(PN->getParent(), NonSimplifiedBB);
-    }
-    InsertNewInstBefore(Clone, NonSimplifiedBB->getTerminator()->getIterator());
-  }
-
   for (unsigned i = 0; i != NumPHIValues; ++i) {
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nikic wrote:

Can drop braces here now.

https://github.com/llvm/llvm-project/pull/107769