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//===--- SPIRVCallLowering.h - Call lowering --------------------*- 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 describes how to lower LLVM calls to machine code calls.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H
#define LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H
#include "SPIRVGlobalRegistry.h"
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
namespace llvm {
class SPIRVGlobalRegistry;
class SPIRVTargetLowering;
class SPIRVCallLowering : public CallLowering {
private:
// Used to create and assign function, argument, and return type information.
SPIRVGlobalRegistry *GR;
// Used to postpone producing of indirect function pointer types
// after all indirect calls info is collected
struct SPIRVIndirectCall {
const Type *RetTy = nullptr;
SmallVector<Type *> ArgTys;
SmallVector<Register> ArgRegs;
Register Callee;
};
void produceIndirectPtrTypes(MachineIRBuilder &MIRBuilder) const;
mutable SmallVector<SPIRVIndirectCall> IndirectCalls;
public:
SPIRVCallLowering(const SPIRVTargetLowering &TLI, SPIRVGlobalRegistry *GR);
// Built OpReturn or OpReturnValue.
bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI,
Register SwiftErrorVReg) const override;
// Build OpFunction, OpFunctionParameter, and any EntryPoint or Linkage data.
bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
ArrayRef<ArrayRef<Register>> VRegs,
FunctionLoweringInfo &FLI) const override;
// Build OpCall, or replace with a builtin function.
bool lowerCall(MachineIRBuilder &MIRBuilder,
CallLoweringInfo &Info) const override;
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H
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