[llvm-branch-commits] [llvm] [SLP] Drop the context of a vector fmul whose user is not vectorized (PR #228902)

[Alexey Bataev via llvm-branch-commits]

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@@ -17575,9 +17575,22 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
       unsigned OpIdx = isa<UnaryOperator>(VL0) ? 0 : 1;
       TTI::OperandValueInfo Op1Info = getOperandInfo(E->getOperand(0));
       TTI::OperandValueInfo Op2Info = getOperandInfo(E->getOperand(OpIdx));
+      // A target may price an fmul by the fadd or fsub user of its context.
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alexey-bataev wrote:

Then target shall consider it in TTI, it should not be SLP decision

https://github.com/llvm/llvm-project/pull/228902