8ba2ae31fa
This allows us to handle return values that are too large to fit in x10 and x11. They will be converted to a sret by passing a pointer to where to store the return value.
56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
//===-- RISCVCallLowering.h - Call lowering ---------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// This file describes how to lower LLVM calls to machine code calls.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
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#define LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/GlobalISel/CallLowering.h"
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namespace llvm {
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class MachineInstrBuilder;
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class MachineIRBuilder;
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class RISCVTargetLowering;
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class RISCVCallLowering : public CallLowering {
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public:
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RISCVCallLowering(const RISCVTargetLowering &TLI);
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bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
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ArrayRef<Register> VRegs,
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FunctionLoweringInfo &FLI) const override;
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bool canLowerReturn(MachineFunction &MF, CallingConv::ID CallConv,
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SmallVectorImpl<BaseArgInfo> &Outs,
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bool IsVarArg) const override;
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bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
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ArrayRef<ArrayRef<Register>> VRegs,
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FunctionLoweringInfo &FLI) const override;
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bool lowerCall(MachineIRBuilder &MIRBuilder,
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CallLoweringInfo &Info) const override;
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private:
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void saveVarArgRegisters(MachineIRBuilder &MIRBuilder,
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CallLowering::IncomingValueHandler &Handler,
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IncomingValueAssigner &Assigner,
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CCState &CCInfo) const;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
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