9976e5702f
This PR is the first step towards bringing GlobalISel to the Wasm backend. Split from #157161
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
//===-- WebAssemblyCallLowering.cpp - Call lowering for GlobalISel -*- 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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#include "WebAssemblyCallLowering.h"
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#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
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#include "WebAssemblyISelLowering.h"
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#include "WebAssemblyMachineFunctionInfo.h"
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#include "WebAssemblySubtarget.h"
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#include "WebAssemblyUtilities.h"
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#include "llvm/CodeGen/Analysis.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DebugLoc.h"
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#include "llvm/IR/Value.h"
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#define DEBUG_TYPE "wasm-call-lowering"
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using namespace llvm;
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WebAssemblyCallLowering::WebAssemblyCallLowering(
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const WebAssemblyTargetLowering &TLI)
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: CallLowering(&TLI) {}
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bool WebAssemblyCallLowering::canLowerReturn(MachineFunction &MF,
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CallingConv::ID CallConv,
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SmallVectorImpl<BaseArgInfo> &Outs,
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bool IsVarArg) const {
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return WebAssembly::canLowerReturn(Outs.size(),
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&MF.getSubtarget<WebAssemblySubtarget>());
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}
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bool WebAssemblyCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
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const Value *Val,
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ArrayRef<Register> VRegs,
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FunctionLoweringInfo &FLI,
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Register SwiftErrorVReg) const {
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if (!Val)
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return true; // allow only void returns for now
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return false;
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}
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bool WebAssemblyCallLowering::lowerFormalArguments(
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MachineIRBuilder &MIRBuilder, const Function &F,
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ArrayRef<ArrayRef<Register>> VRegs, FunctionLoweringInfo &FLI) const {
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if (VRegs.empty())
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return true; // allow only empty signatures for now
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return false;
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}
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bool WebAssemblyCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
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CallLoweringInfo &Info) const {
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return false;
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}
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