[llvm] [SLP] NFC. Make InstructionsState more constant. (PR #118609)

[Alexey Bataev via llvm-commits]

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@@ -7426,17 +7435,17 @@ bool BoUpSLP::areAltOperandsProfitable(const InstructionsState &S,
   unsigned Opcode1 = S.getAltOpcode();
   SmallBitVector OpcodeMask(getAltInstrMask(VL, Opcode0, Opcode1));
   // If this pattern is supported by the target then consider it profitable.
-  if (TTI->isLegalAltInstr(getWidenedType(S.MainOp->getType(), VL.size()),
+  if (TTI->isLegalAltInstr(getWidenedType(S.getMainOp()->getType(), VL.size()),
                            Opcode0, Opcode1, OpcodeMask))
     return true;
   SmallVector<ValueList> Operands;
-  for (unsigned I : seq<unsigned>(0, S.MainOp->getNumOperands())) {
+  for (unsigned I : seq<unsigned>(0, S.getMainOp()->getNumOperands())) {
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alexey-bataev wrote:

`for (unsigned I : seq<unsigned>(S.getMainOp()->getNumOperands())) {`

https://github.com/llvm/llvm-project/pull/118609