[Hexagon] Rudimentary support for auto-vectorization for HVX

This implements a set of TTI functions that the loop vectorizer uses.
The only purpose of this is to enable testing. Auto-vectorization is
disabled by default, enabled by -hexagon-autohvx.

llvm-svn: 328639

1 files changed, 107 insertions, 1 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
index 58e23b2e1dc..7adacafa11c 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
+++ b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
@@ -70,6 +70,113 @@ public:
   /// @{
 
   unsigned getNumberOfRegisters(bool vector) const;
+  unsigned getMaxInterleaveFactor(unsigned VF);
+  unsigned getRegisterBitWidth(bool Vector) const;
+  unsigned getMinVectorRegisterBitWidth() const;
+
+  bool supportsEfficientVectorElementLoadStore() {
+    return false;
+  }
+
+  unsigned getScalarizationOverhead(Type *Ty, bool Insert, bool Extract) {
+    return 0;
+  }
+
+  unsigned getOperandsScalarizationOverhead(ArrayRef<const Value*> Args,
+                                            unsigned VF) {
+    return 0;
+  }
+
+  unsigned getCallInstrCost(Function *F, Type *RetTy, ArrayRef<Type*> Tys) {
+    return 1;
+  }
+
+  unsigned getIntrinsicInstrCost(Intrinsic::ID ID, Type *RetTy,
+            ArrayRef<Value*> Args, FastMathFlags FMF, unsigned VF) {
+    return BaseT::getIntrinsicInstrCost(ID, RetTy, Args, FMF, VF);
+  }
+  unsigned getIntrinsicInstrCost(Intrinsic::ID ID, Type *RetTy,
+            ArrayRef<Type*> Tys, FastMathFlags FMF,
+            unsigned ScalarizationCostPassed = UINT_MAX) {
+    return 1;
+  }
+
+  bool hasBranchDivergence() {
+    return false;
+  }
+
+  bool enableAggressiveInterleaving(bool LoopHasReductions) {
+    return false;
+  }
+
+  unsigned getCFInstrCost(unsigned Opcode) {
+    return 1;
+  }
+
+  unsigned getAddressComputationCost(Type *Tp, ScalarEvolution *,
+                                     const SCEV *) {
+    return 0;
+  }
+
+  unsigned getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
+            unsigned AddressSpace, const Instruction *I = nullptr);
+
+  unsigned getMaskedMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
+                                 unsigned AddressSpace) {
+    return 1;
+  }
+
+  unsigned getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index,
+                          Type *SubTp) {
+    return 1;
+  }
+
+  unsigned getGatherScatterOpCost(unsigned Opcode, Type *DataTy, Value *Ptr,
+                                  bool VariableMask,
+                                  unsigned Alignment) {
+    return 1;
+  }
+
+  unsigned getInterleavedMemoryOpCost(unsigned Opcode, Type *VecTy,
+                                      unsigned Factor,
+                                      ArrayRef<unsigned> Indices,
+                                      unsigned Alignment,
+                                      unsigned AddressSpace) {
+    return BaseT::getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
+                                             Alignment, AddressSpace);
+  }
+
+  unsigned getNumberOfParts(Type *Tp) {
+    return BaseT::getNumberOfParts(Tp);
+  }
+
+  bool prefersVectorizedAddressing() {
+    return true;
+  }
+
+  unsigned getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
+                              const Instruction *I) {
+    return BaseT::getCmpSelInstrCost(Opcode, ValTy, CondTy, I);
+  }
+
+  unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty,
+            TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
+            TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
+            TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
+            TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
+            ArrayRef<const Value *> Args = ArrayRef<const Value *>()) {
+    return BaseT::getArithmeticInstrCost(Opcode, Ty, Opd1Info, Opd2Info,
+                                         Opd1PropInfo, Opd2PropInfo, Args);
+  }
+
+  unsigned getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
+                            const Instruction *I = nullptr) {
+    return 1;
+  }
+
+  unsigned getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index) {
+    return 1;
+  }
 
   /// @}
 
@@ -80,5 +187,4 @@ public:
 };
 
 } // end namespace llvm
-
 #endif // LLVM_LIB_TARGET_HEXAGON_HEXAGONTARGETTRANSFORMINFO_H