[llvm] [SLP] Fix canConvertToFMA operand selection and fmul costing (PR #216425)

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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 381a11760..4874fc235 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -14429,8 +14429,8 @@ static InstructionCost canConvertToFMA(ArrayRef<Value *> VL,
   // feeding a reduction, which is usually better than the scalar fma chain
   // this check protects. An fsub can only fold an fmul on its left, so stop at
   // operand 0 there as well.
-  bool AllowReassoc = any_of(
-      VL, [](Value *V) { return match(V, m_AllowReassoc(m_Value())); });
+  bool AllowReassoc =
+      any_of(VL, [](Value *V) { return match(V, m_AllowReassoc(m_Value())); });
   bool OnlyFirstOperand = AllowReassoc || S.getOpcode() == Instruction::FSub;
   auto GetFMulOperandIdx = [&]() -> std::optional<unsigned> {
     for (unsigned Idx :

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https://github.com/llvm/llvm-project/pull/216425