8cb842879d
It prevents LLVM from being linked with LLD at least on Windows, with
errors like this:
```
= note: ld.lld: error: duplicate symbol: vtable for llvm::FormalArgHandler
>>> defined at librustc_llvm-a81737dd65a7c126.rlib(M68kCallLowering.cpp.obj)
>>> defined at librustc_llvm-a81737dd65a7c126.rlib(PPCCallLowering.cpp.obj)
```
Binutils linker also complains about this, but only with warnings.
`FormalArgHandler` has a base class `M68kIncomingValueHandler` which
doesn't have a virtual method `markPhysRegUsed` like
`IncomingValueHandler`s for all other targets including PPC, so it
results in a conflict.
The simplest fix is to rename the `FormalArgHandler` structure (rather
than to add virtual methods for compatibility).
cc https://github.com/rust-lang/rust/issues/107668
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
//===-- M68kCallLowering.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 implements the lowering of LLVM calls to machine code calls for
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/// GlobalISel.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H
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#define LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/GlobalISel/CallLowering.h"
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#include "llvm/CodeGen/ValueTypes.h"
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namespace llvm {
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class M68kTargetLowering;
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class MachineInstrBuilder;
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class M68kCallLowering : public CallLowering {
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// TODO: We are only supporting return instruction with no value at this time
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// point
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public:
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M68kCallLowering(const M68kTargetLowering &TLI);
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bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
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ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI,
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Register SwiftErrorVReg) 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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bool enableBigEndian() const override;
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};
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struct M68kIncomingValueHandler : public CallLowering::IncomingValueHandler {
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M68kIncomingValueHandler(MachineIRBuilder &MIRBuilder,
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MachineRegisterInfo &MRI)
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: CallLowering::IncomingValueHandler(MIRBuilder, MRI) {}
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uint64_t StackUsed;
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private:
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void assignValueToReg(Register ValVReg, Register PhysReg,
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const CCValAssign &VA) override;
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void assignValueToAddress(Register ValVReg, Register Addr, LLT MemTy,
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const MachinePointerInfo &MPO,
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const CCValAssign &VA) override;
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Register getStackAddress(uint64_t Size, int64_t Offset,
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MachinePointerInfo &MPO,
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ISD::ArgFlagsTy Flags) override;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H
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