Update BBVectorize to use the new VTTI instr. cost interfaces.

The monolithic interface for instruction costs has been split into
several functions. This is the corresponding change. No functionality
change is intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166865 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Vectorize/BBVectorize.cpp

@@ -484,6 +484,61 @@ namespace {
       return 1;
     }
 
+    // Returns the cost of the provided instruction using VTTI.
+    // This does not handle loads and stores.
+    unsigned getInstrCost(unsigned Opcode, Type *T1, Type *T2) {
+      switch (Opcode) {
+      default: break;
+      case Instruction::GetElementPtr:
+        // We mark this instruction as zero-cost because scalar GEPs are usually
+        // lowered to the intruction addressing mode. At the moment we don't
+        // generate vector GEPs.
+        return 0;
+      case Instruction::Br:
+        return VTTI->getCFInstrCost(Opcode);
+      case Instruction::PHI:
+        return 0;
+      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:
+        return VTTI->getArithmeticInstrCost(Opcode, T1);
+      case Instruction::Select:
+      case Instruction::ICmp:
+      case Instruction::FCmp:
+        return VTTI->getCmpSelInstrCost(Opcode, T1, T2);
+      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:
+        return VTTI->getCastInstrCost(Opcode, T1, T2);
+      }
+
+      return 1;
+    }
+
     // This determines the relative offset of two loads or stores, returning
     // true if the offset could be determined to be some constant value.
     // For example, if OffsetInElmts == 1, then J accesses the memory directly
@@ -834,11 +889,11 @@ namespace {
         return false;
       }
     } else if (VTTI) {
-      unsigned ICost = VTTI->getInstrCost(I->getOpcode(), IT1, IT2);
-      unsigned JCost = VTTI->getInstrCost(J->getOpcode(), JT1, JT2);
+      unsigned ICost = getInstrCost(I->getOpcode(), IT1, IT2);
+      unsigned JCost = getInstrCost(J->getOpcode(), JT1, JT2);
       Type *VT1 = getVecTypeForPair(IT1, JT1),
            *VT2 = getVecTypeForPair(IT2, JT2);
-      unsigned VCost = VTTI->getInstrCost(I->getOpcode(), VT1, VT2);
+      unsigned VCost = getInstrCost(I->getOpcode(), VT1, VT2);
 
       if (VCost > ICost + JCost)
         return false;