SPIRVUtils.h

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//===--- SPIRVUtils.h ---- SPIR-V Utility Functions -------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains miscellaneous utility functions.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_SPIRV_SPIRVUTILS_H
#define LLVM_LIB_TARGET_SPIRV_SPIRVUTILS_H
 
#include "MCTargetDesc/SPIRVBaseInfo.h"
#include "llvm/IR/IRBuilder.h"
#include <string>
 
namespace llvm {
class MCInst;
class MachineFunction;
class MachineInstr;
class MachineInstrBuilder;
class MachineIRBuilder;
class MachineRegisterInfo;
class Register;
class StringRef;
class SPIRVInstrInfo;
 
// Add the given string as a series of integer operand, inserting null
// terminators and padding to make sure the operands all have 32-bit
// little-endian words.
void addStringImm(const StringRef &Str, MCInst &Inst);
void addStringImm(const StringRef &Str, MachineInstrBuilder &MIB);
void addStringImm(const StringRef &Str, IRBuilder<> &B,
                  std::vector<Value *> &Args);
 
// Read the series of integer operands back as a null-terminated string using
// the reverse of the logic in addStringImm.
std::string getStringImm(const MachineInstr &MI, unsigned StartIndex);
 
// Add the given numerical immediate to MIB.
void addNumImm(const APInt &Imm, MachineInstrBuilder &MIB);
 
// Add an OpName instruction for the given target register.
void buildOpName(Register Target, const StringRef &Name,
                 MachineIRBuilder &MIRBuilder);
 
// Add an OpDecorate instruction for the given Reg.
void buildOpDecorate(Register Reg, MachineIRBuilder &MIRBuilder,
                     SPIRV::Decoration::Decoration Dec,
                     const std::vector<uint32_t> &DecArgs,
                     StringRef StrImm = "");
void buildOpDecorate(Register Reg, MachineInstr &I, const SPIRVInstrInfo &TII,
                     SPIRV::Decoration::Decoration Dec,
                     const std::vector<uint32_t> &DecArgs,
                     StringRef StrImm = "");
 
// Convert a SPIR-V storage class to the corresponding LLVM IR address space.
unsigned storageClassToAddressSpace(SPIRV::StorageClass::StorageClass SC);
 
// Convert an LLVM IR address space to a SPIR-V storage class.
SPIRV::StorageClass::StorageClass
addressSpaceToStorageClass(unsigned AddrSpace);
 
SPIRV::MemorySemantics::MemorySemantics
getMemSemanticsForStorageClass(SPIRV::StorageClass::StorageClass SC);
 
SPIRV::MemorySemantics::MemorySemantics getMemSemantics(AtomicOrdering Ord);
 
// Find def instruction for the given ConstReg, walking through
// spv_track_constant and ASSIGN_TYPE instructions. Updates ConstReg by def
// of OpConstant instruction.
MachineInstr *getDefInstrMaybeConstant(Register &ConstReg,
                                       const MachineRegisterInfo *MRI);
 
// Get constant integer value of the given ConstReg.
uint64_t getIConstVal(Register ConstReg, const MachineRegisterInfo *MRI);
 
// Check if MI is a SPIR-V specific intrinsic call.
bool isSpvIntrinsic(MachineInstr &MI, Intrinsic::ID IntrinsicID);
 
// Get type of i-th operand of the metadata node.
Type *getMDOperandAsType(const MDNode *N, unsigned I);
 
// If OpenCL or SPIR-V builtin function name is recognized, return a demangled
// name, otherwise return an empty string.
std::string getOclOrSpirvBuiltinDemangledName(StringRef Name);
 
// If Type is a pointer type and it is not opaque pointer, return its
// element type, otherwise return Type.
const Type *getTypedPtrEltType(const Type *Type);
 
// Check if a string contains a builtin prefix.
bool hasBuiltinTypePrefix(StringRef Name);
 
// Check if given LLVM type is a special opaque builtin type.
bool isSpecialOpaqueType(const Type *Ty);
} // namespace llvm
#endif // LLVM_LIB_TARGET_SPIRV_SPIRVUTILS_H