[llvm] [InstCombine] Fold max(max(x, c1) << c2, c3) —> max(x << c2, c3) when c3 >= c1 * 2 ^ c2 (PR #140526)

[Yingwei Zheng via llvm-commits]

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@@ -1174,6 +1174,163 @@ static Instruction *moveAddAfterMinMax(IntrinsicInst *II,
   return IsSigned ? BinaryOperator::CreateNSWAdd(NewMinMax, Add->getOperand(1))
                   : BinaryOperator::CreateNUWAdd(NewMinMax, Add->getOperand(1));
 }
+
+
+static bool rightDistributesOverLeft(Instruction::BinaryOps ROp, bool HasNUW,
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dtcxzyw wrote:

Please add some header comments for this function.

https://github.com/llvm/llvm-project/pull/140526