[SLP][NFC]Use TreeEntry::getOprand instead of trying to rebuild it in getOperandInfo(), NFC.

Author: alexey-bataev

llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

@@ -2424,7 +2424,7 @@ class BoUpSLP {
 
   /// Return information about the vector formed for the specified index
   /// of a vector of (the same) instruction.
-  TargetTransformInfo::OperandValueInfo getOperandInfo(ArrayRef<Value *> VL,
+  TargetTransformInfo::OperandValueInfo getOperandInfo(const TreeEntry &E,
                                                        unsigned OpIdx);
 
   /// \returns the cost of the vectorizable entry.
@@ -6521,52 +6521,29 @@ static bool isAlternateInstruction(const Instruction *I,
   return I->getOpcode() == AltOp->getOpcode();
 }
 
-TTI::OperandValueInfo BoUpSLP::getOperandInfo(ArrayRef<Value *> VL,
+TTI::OperandValueInfo BoUpSLP::getOperandInfo(const TreeEntry &E,
                                               unsigned OpIdx) {
+  ArrayRef<Value*> VL = E.getOperand(OpIdx);
   assert(!VL.empty());
-  const auto *I0 = cast<Instruction>(*find_if(VL, Instruction::classof));
-  const auto *Op0 = I0->getOperand(OpIdx);
+  const auto *Op0 = VL.front();
 
-  const bool IsConstant = all_of(VL, [&](Value *V) {
+  const bool IsConstant = all_of(VL, [](Value *V) {
     // TODO: We should allow undef elements here
-    const auto *I = dyn_cast<Instruction>(V);
-    if (!I)
-      return true;
-    auto *Op = I->getOperand(OpIdx);
-    return isConstant(Op) && !isa<UndefValue>(Op);
+    return isConstant(V) && !isa<UndefValue>(V);
   });
-  const bool IsUniform = all_of(VL, [&](Value *V) {
+  const bool IsUniform = all_of(VL, [=](Value *V) {
     // TODO: We should allow undef elements here
-    const auto *I = dyn_cast<Instruction>(V);
-    if (!I)
-      return false;
-    return I->getOperand(OpIdx) == Op0;
+    return V == Op0;
   });
-  const bool IsPowerOfTwo = all_of(VL, [&](Value *V) {
+  const bool IsPowerOfTwo = all_of(VL, [](Value *V) {
     // TODO: We should allow undef elements here
-    const auto *I = dyn_cast<Instruction>(V);
-    if (!I) {
-      assert((isa<UndefValue>(V) ||
-              I0->getOpcode() == Instruction::GetElementPtr) &&
-             "Expected undef or GEP.");
-      return true;
-    }
-    auto *Op = I->getOperand(OpIdx);
-    if (auto *CI = dyn_cast<ConstantInt>(Op))
+    if (auto *CI = dyn_cast<ConstantInt>(V))
       return CI->getValue().isPowerOf2();
     return false;
   });
-  const bool IsNegatedPowerOfTwo = all_of(VL, [&](Value *V) {
+  const bool IsNegatedPowerOfTwo = all_of(VL, [](Value *V) {
     // TODO: We should allow undef elements here
-    const auto *I = dyn_cast<Instruction>(V);
-    if (!I) {
-      assert((isa<UndefValue>(V) ||
-              I0->getOpcode() == Instruction::GetElementPtr) &&
-             "Expected undef or GEP.");
-      return true;
-    }
-    const auto *Op = I->getOperand(OpIdx);
-    if (auto *CI = dyn_cast<ConstantInt>(Op))
+    if (auto *CI = dyn_cast<ConstantInt>(V))
       return CI->getValue().isNegatedPowerOf2();
     return false;
   });
@@ -7973,8 +7950,8 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
     };
     auto GetVectorCost = [=](InstructionCost CommonCost) {
       unsigned OpIdx = isa<UnaryOperator>(VL0) ? 0 : 1;
-      TTI::OperandValueInfo Op1Info = getOperandInfo(VL, 0);
-      TTI::OperandValueInfo Op2Info = getOperandInfo(VL, OpIdx);
+      TTI::OperandValueInfo Op1Info = getOperandInfo(*E, 0);
+      TTI::OperandValueInfo Op2Info = getOperandInfo(*E, OpIdx);
       return TTI->getArithmeticInstrCost(ShuffleOrOp, VecTy, CostKind, Op1Info,
                                          Op2Info) +
              CommonCost;
@@ -8030,7 +8007,7 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
     bool IsReorder = !E->ReorderIndices.empty();
     auto GetScalarCost = [=](unsigned Idx) {
       auto *VI = cast<StoreInst>(VL[Idx]);
-      TTI::OperandValueInfo OpInfo = getOperandInfo(VI, 0);
+      TTI::OperandValueInfo OpInfo = TTI::getOperandInfo(VI->getValueOperand());
       return TTI->getMemoryOpCost(Instruction::Store, ScalarTy, VI->getAlign(),
                                   VI->getPointerAddressSpace(), CostKind,
                                   OpInfo, VI);
@@ -8039,7 +8016,7 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
         cast<StoreInst>(IsReorder ? VL[E->ReorderIndices.front()] : VL0);
     auto GetVectorCost = [=](InstructionCost CommonCost) {
       // We know that we can merge the stores. Calculate the cost.
-      TTI::OperandValueInfo OpInfo = getOperandInfo(VL, 0);
+      TTI::OperandValueInfo OpInfo = getOperandInfo(*E, 0);
       return TTI->getMemoryOpCost(Instruction::Store, VecTy, BaseSI->getAlign(),
                                   BaseSI->getPointerAddressSpace(), CostKind,
                                   OpInfo) +