| 1 | //===--- SPIRVCallLowering.h - Call lowering --------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file describes how to lower LLVM calls to machine code calls. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #ifndef LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H |
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| 14 | #define LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H |
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| 15 | |
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| 16 | #include "SPIRVGlobalRegistry.h" |
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| 17 | #include "llvm/CodeGen/GlobalISel/CallLowering.h" |
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| 18 | |
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| 19 | namespace llvm { |
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| 20 | |
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| 21 | class SPIRVGlobalRegistry; |
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| 22 | class SPIRVTargetLowering; |
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| 23 | |
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| 24 | class SPIRVCallLowering : public CallLowering { |
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| 25 | private: |
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| 26 | // Used to create and assign function, argument, and return type information. |
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| 27 | SPIRVGlobalRegistry *GR; |
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| 28 | |
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| 29 | // Used to postpone producing of indirect function pointer types |
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| 30 | // after all indirect calls info is collected |
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| 31 | struct SPIRVIndirectCall { |
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| 32 | const Type *RetTy = nullptr; |
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| 33 | SmallVector<Type *> ArgTys; |
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| 34 | SmallVector<Register> ArgRegs; |
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| 35 | Register Callee; |
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| 36 | }; |
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| 37 | void produceIndirectPtrTypes(MachineIRBuilder &MIRBuilder) const; |
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| 38 | mutable SmallVector<SPIRVIndirectCall> IndirectCalls; |
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| 39 | |
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| 40 | public: |
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| 41 | SPIRVCallLowering(const SPIRVTargetLowering &TLI, SPIRVGlobalRegistry *GR); |
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| 42 | |
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| 43 | // Built OpReturn or OpReturnValue. |
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| 44 | bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val, |
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| 45 | ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI, |
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| 46 | Register SwiftErrorVReg) const override; |
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| 47 | |
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| 48 | // Build OpFunction, OpFunctionParameter, and any EntryPoint or Linkage data. |
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| 49 | bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, |
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| 50 | ArrayRef<ArrayRef<Register>> VRegs, |
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| 51 | FunctionLoweringInfo &FLI) const override; |
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| 52 | |
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| 53 | // Build OpCall, or replace with a builtin function. |
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| 54 | bool lowerCall(MachineIRBuilder &MIRBuilder, |
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| 55 | CallLoweringInfo &Info) const override; |
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| 56 | }; |
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| 57 | } // end namespace llvm |
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| 58 | |
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| 59 | #endif // LLVM_LIB_TARGET_SPIRV_SPIRVCALLLOWERING_H |
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| 60 | |
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