[NFCI] Move cost estimation from TargetLowering to TargetTransformInfo.

TragetLowering had two last InstructionCost related `getTypeLegalizationCost()`
and `getScalingFactorCost()` members, but all other costs are processed in TTI.

E.g. it is not comfortable to use other TTI members in these two functions
overrided in a target.

Minor refactoring: `getTypeLegalizationCost()` now doesn't need DataLayout
parameter - it was always passed from TTI.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D117723

1 files changed, 0 insertions, 35 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp
index 75ed8ba..4cf81cd 100644
--- a/llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -1843,41 +1843,6 @@ int TargetLoweringBase::InstructionOpcodeToISD(unsigned Opcode) const {
   llvm_unreachable("Unknown instruction type encountered!");
 }
 
-std::pair<InstructionCost, MVT>
-TargetLoweringBase::getTypeLegalizationCost(const DataLayout &DL,
-                                            Type *Ty) const {
-  LLVMContext &C = Ty->getContext();
-  EVT MTy = getValueType(DL, Ty);
-
-  InstructionCost Cost = 1;
-  // We keep legalizing the type until we find a legal kind. We assume that
-  // the only operation that costs anything is the split. After splitting
-  // we need to handle two types.
-  while (true) {
-    LegalizeKind LK = getTypeConversion(C, MTy);
-
-    if (LK.first == TypeScalarizeScalableVector) {
-      // Ensure we return a sensible simple VT here, since many callers of this
-      // function require it.
-      MVT VT = MTy.isSimple() ? MTy.getSimpleVT() : MVT::i64;
-      return std::make_pair(InstructionCost::getInvalid(), VT);
-    }
-
-    if (LK.first == TypeLegal)
-      return std::make_pair(Cost, MTy.getSimpleVT());
-
-    if (LK.first == TypeSplitVector || LK.first == TypeExpandInteger)
-      Cost *= 2;
-
-    // Do not loop with f128 type.
-    if (MTy == LK.second)
-      return std::make_pair(Cost, MTy.getSimpleVT());
-
-    // Keep legalizing the type.
-    MTy = LK.second;
-  }
-}
-
 Value *
 TargetLoweringBase::getDefaultSafeStackPointerLocation(IRBuilderBase &IRB,
                                                        bool UseTLS) const {