[llvm] [InstCombine] Simplifiy `(-x * y * -x)` into `(x * y * x)` (PR #72953)

[via llvm-commits]

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@@ -349,7 +349,7 @@ Instruction *InstCombinerImpl::visitMul(BinaryOperator &I) {
 
   // -X * Y --> -(X * Y)
   // X * -Y --> -(X * Y)
-  if (match(&I, m_c_Mul(m_OneUse(m_Neg(m_Value(X))), m_Value(Y))))
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goldsteinn wrote:

Think this will cause regressions if the `-x` is not used by a subsequent `mul`, but by some other independent instruction.

Maybe match the full pattern?

https://github.com/llvm/llvm-project/pull/72953