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//===-- WebAssemblyCallLowering.cpp - Call lowering for GlobalISel -*- 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file implements the lowering of LLVM calls to machine code calls for
/// GlobalISel.
///
//===----------------------------------------------------------------------===//
#include "WebAssemblyCallLowering.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssemblyISelLowering.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyUtilities.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Value.h"
#define DEBUG_TYPE "wasm-call-lowering"
using namespace llvm;
WebAssemblyCallLowering::WebAssemblyCallLowering(
const WebAssemblyTargetLowering &TLI)
: CallLowering(&TLI) {}
bool WebAssemblyCallLowering::canLowerReturn(MachineFunction &MF,
CallingConv::ID CallConv,
SmallVectorImpl<BaseArgInfo> &Outs,
bool IsVarArg) const {
return WebAssembly::canLowerReturn(Outs.size(),
&MF.getSubtarget<WebAssemblySubtarget>());
}
bool WebAssemblyCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
const Value *Val,
ArrayRef<Register> VRegs,
FunctionLoweringInfo &FLI,
Register SwiftErrorVReg) const {
if (!Val)
return true; // allow only void returns for now
return false;
}
bool WebAssemblyCallLowering::lowerFormalArguments(
MachineIRBuilder &MIRBuilder, const Function &F,
ArrayRef<ArrayRef<Register>> VRegs, FunctionLoweringInfo &FLI) const {
if (VRegs.empty())
return true; // allow only empty signatures for now
return false;
}
bool WebAssemblyCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
CallLoweringInfo &Info) const {
return false;
}
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