[TTI] Remove getInstructionThroughput cost helper.

Pulled out of D79483 - we can just as easily use getUserCost directly

Author: RKSimon

llvm/include/llvm/Analysis/TargetTransformInfo.h

@@ -230,12 +230,10 @@ class TargetTransformInfo {
                                      enum TargetCostKind kind) const {
     InstructionCost Cost;
     switch (kind) {
-    case TCK_RecipThroughput:
-      Cost = getInstructionThroughput(I);
-      break;
     case TCK_Latency:
       Cost = getInstructionLatency(I);
       break;
+    case TCK_RecipThroughput:
     case TCK_CodeSize:
     case TCK_SizeAndLatency:
       Cost = getUserCost(I, kind);
@@ -1525,10 +1523,6 @@ class TargetTransformInfo {
   /// Returns 1 as the default value.
   InstructionCost getInstructionLatency(const Instruction *I) const;
 
-  /// Returns the expected throughput cost of the instruction.
-  /// Returns -1 if the cost is unknown.
-  InstructionCost getInstructionThroughput(const Instruction *I) const;
-
   /// The abstract base class used to type erase specific TTI
   /// implementations.
   class Concept;

llvm/lib/Analysis/TargetTransformInfo.cpp

@@ -1154,65 +1154,6 @@ TargetTransformInfo::getInstructionLatency(const Instruction *I) const {
   return TTIImpl->getInstructionLatency(I);
 }
 
-InstructionCost
-TargetTransformInfo::getInstructionThroughput(const Instruction *I) const {
-  TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput;
-
-  switch (I->getOpcode()) {
-  case Instruction::GetElementPtr:
-  case Instruction::Ret:
-  case Instruction::PHI:
-  case Instruction::Br:
-  case Instruction::Add:
-  case Instruction::FAdd:
-  case Instruction::Sub:
-  case Instruction::FSub:
-  case Instruction::Mul:
-  case Instruction::FMul:
-  case Instruction::UDiv:
-  case Instruction::SDiv:
-  case Instruction::FDiv:
-  case Instruction::URem:
-  case Instruction::SRem:
-  case Instruction::FRem:
-  case Instruction::Shl:
-  case Instruction::LShr:
-  case Instruction::AShr:
-  case Instruction::And:
-  case Instruction::Or:
-  case Instruction::Xor:
-  case Instruction::FNeg:
-  case Instruction::Select:
-  case Instruction::ICmp:
-  case Instruction::FCmp:
-  case Instruction::Store:
-  case Instruction::Load:
-  case Instruction::ZExt:
-  case Instruction::SExt:
-  case Instruction::FPToUI:
-  case Instruction::FPToSI:
-  case Instruction::FPExt:
-  case Instruction::PtrToInt:
-  case Instruction::IntToPtr:
-  case Instruction::SIToFP:
-  case Instruction::UIToFP:
-  case Instruction::Trunc:
-  case Instruction::FPTrunc:
-  case Instruction::BitCast:
-  case Instruction::AddrSpaceCast:
-  case Instruction::ExtractElement:
-  case Instruction::InsertElement:
-  case Instruction::ExtractValue:
-  case Instruction::ShuffleVector:
-  case Instruction::Call:
-  case Instruction::Switch:
-    return getUserCost(I, CostKind);
-  default:
-    // We don't have any information on this instruction.
-    return -1;
-  }
-}
-
 TargetTransformInfo::Concept::~Concept() = default;
 
 TargetIRAnalysis::TargetIRAnalysis() : TTICallback(&getDefaultTTI) {}