[llvm] [InstCombine] Support division of numbers that can be converted to a shift (PR #88220)

[via llvm-commits]

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@@ -1149,6 +1149,32 @@ Instruction *InstCombinerImpl::commonIDivTransforms(BinaryOperator &I) {
         Mul->setHasNoSignedWrap(OBO->hasNoSignedWrap());
         return Mul;
       }
+
+      // If we can reduce these functions so they can factor out to a shift or
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AtariDreams wrote:

Note to self: make this one_use for the multiplication when I get back

https://github.com/llvm/llvm-project/pull/88220