[llvm] [InstCombine] Restrict `foldBitCeil` to power-of-two integer widths (PR #173849)

[Yunbo Ni via llvm-commits]

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@@ -3871,6 +3871,9 @@ static Instruction *foldBitCeil(SelectInst &SI, IRBuilderBase &Builder,
                                    ShouldDropNoWrap))
     return nullptr;
 
+  if (!isPowerOf2_32(BitWidth))
+    return nullptr;
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cardigan1008 wrote:

Done, tks. 

https://github.com/llvm/llvm-project/pull/173849