llvm/lib/Target/SPIRV/SPIRVISelLowering.h

   1 //===-- SPIRVISelLowering.h - SPIR-V DAG Lowering Interface -----*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file defines the interfaces that SPIR-V uses to lower LLVM code into a
  10 // selection DAG.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_SPIRV_SPIRVISELLOWERING_H
  15 #define LLVM_LIB_TARGET_SPIRV_SPIRVISELLOWERING_H
  16
  17 #include "llvm/CodeGen/TargetLowering.h"
  18
  19 namespace llvm {
  20 class SPIRVSubtarget;
  21
  22 class SPIRVTargetLowering : public TargetLowering {
  23 public:
  24   explicit SPIRVTargetLowering(const TargetMachine &TM,
  25                                const SPIRVSubtarget &STI)
  26       : TargetLowering(TM) {}
  27
  28   // Stop IRTranslator breaking up FMA instrs to preserve types information.
  29   bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
  30                                   EVT) const override {
  31     return true;
  32   }
  33
  34   // This is to prevent sexts of non-i64 vector indices which are generated
  35   // within general IRTranslator hence type generation for it is omitted.
  36   MVT getVectorIdxTy(const DataLayout &DL) const override {
  37     return MVT::getIntegerVT(32);
  38   }
  39   unsigned getNumRegistersForCallingConv(LLVMContext &Context,
  40                                          CallingConv::ID CC,
  41                                          EVT VT) const override;
  42   MVT getRegisterTypeForCallingConv(LLVMContext &Context, CallingConv::ID CC,
  43                                     EVT VT) const override;
  44   bool getTgtMemIntrinsic(IntrinsicInfo &Info, const CallInst &I,
  45                           MachineFunction &MF,
  46                           unsigned Intrinsic) const override;
  47 };
  48 } // namespace llvm
  49
  50 #endif // LLVM_LIB_TARGET_SPIRV_SPIRVISELLOWERING_H