1 //===--- SPIRVCallLowering.h - Call lowering --------------------*- 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 describes how to lower LLVM calls to machine code calls. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H 14 #define LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H 15 16 #include "SPIRVGlobalRegistry.h" 17 #include "llvm/CodeGen/GlobalISel/CallLowering.h" 18 19 namespace llvm { 20 21 class SPIRVGlobalRegistry; 22 class SPIRVTargetLowering; 23 24 class SPIRVCallLowering : public CallLowering { 25 private: 26 // Used to create and assign function, argument, and return type information. 27 SPIRVGlobalRegistry *GR; 28 29 // Used to postpone producing of indirect function pointer types 30 // after all indirect calls info is collected 31 struct SPIRVIndirectCall { 32 const Type *RetTy = nullptr; 33 SmallVector<Type *> ArgTys; 34 SmallVector<Register> ArgRegs; 35 Register Callee; 36 }; 37 void produceIndirectPtrTypes(MachineIRBuilder &MIRBuilder) const; 38 mutable SmallVector<SPIRVIndirectCall> IndirectCalls; 39 40 public: 41 SPIRVCallLowering(const SPIRVTargetLowering &TLI, SPIRVGlobalRegistry *GR); 42 43 // Built OpReturn or OpReturnValue. 44 bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val, 45 ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI, 46 Register SwiftErrorVReg) const override; 47 48 // Build OpFunction, OpFunctionParameter, and any EntryPoint or Linkage data. 49 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, 50 ArrayRef<ArrayRef<Register>> VRegs, 51 FunctionLoweringInfo &FLI) const override; 52 53 // Build OpCall, or replace with a builtin function. 54 bool lowerCall(MachineIRBuilder &MIRBuilder, 55 CallLoweringInfo &Info) const override; 56 }; 57 } // end namespace llvm 58 59 #endif // LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H 60