52221d56bc
Summary: The framework for supporting target-specific MachineFunctionInfo was added in r356215. This adds serialization support for WebAssemblyFunctionInfo on top of that. This patch only adds the framework and does not actually serialize anything at this point; we have to add YAML mapping later for the fields in WebAssemblyFunctionInfo we want to serialize if necessary. Reviewers: dschuff, arsenm Subscribers: sunfish, wdng, sbc100, jgravelle-google, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59737 llvm-svn: 357009
90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
//=- WebAssemblyMachineFunctionInfo.cpp - WebAssembly Machine Function Info -=//
|
|
//
|
|
// 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 WebAssembly-specific per-machine-function
|
|
/// information.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "WebAssemblyMachineFunctionInfo.h"
|
|
#include "WebAssemblyISelLowering.h"
|
|
#include "WebAssemblySubtarget.h"
|
|
#include "llvm/CodeGen/Analysis.h"
|
|
using namespace llvm;
|
|
|
|
WebAssemblyFunctionInfo::~WebAssemblyFunctionInfo() = default; // anchor.
|
|
|
|
void WebAssemblyFunctionInfo::initWARegs() {
|
|
assert(WARegs.empty());
|
|
unsigned Reg = UnusedReg;
|
|
WARegs.resize(MF.getRegInfo().getNumVirtRegs(), Reg);
|
|
}
|
|
|
|
void llvm::computeLegalValueVTs(const Function &F, const TargetMachine &TM,
|
|
Type *Ty, SmallVectorImpl<MVT> &ValueVTs) {
|
|
const DataLayout &DL(F.getParent()->getDataLayout());
|
|
const WebAssemblyTargetLowering &TLI =
|
|
*TM.getSubtarget<WebAssemblySubtarget>(F).getTargetLowering();
|
|
SmallVector<EVT, 4> VTs;
|
|
ComputeValueVTs(TLI, DL, Ty, VTs);
|
|
|
|
for (EVT VT : VTs) {
|
|
unsigned NumRegs = TLI.getNumRegisters(F.getContext(), VT);
|
|
MVT RegisterVT = TLI.getRegisterType(F.getContext(), VT);
|
|
for (unsigned I = 0; I != NumRegs; ++I)
|
|
ValueVTs.push_back(RegisterVT);
|
|
}
|
|
}
|
|
|
|
void llvm::computeSignatureVTs(const FunctionType *Ty, const Function &F,
|
|
const TargetMachine &TM,
|
|
SmallVectorImpl<MVT> &Params,
|
|
SmallVectorImpl<MVT> &Results) {
|
|
computeLegalValueVTs(F, TM, Ty->getReturnType(), Results);
|
|
|
|
MVT PtrVT = MVT::getIntegerVT(TM.createDataLayout().getPointerSizeInBits());
|
|
if (Results.size() > 1) {
|
|
// WebAssembly currently can't lower returns of multiple values without
|
|
// demoting to sret (see WebAssemblyTargetLowering::CanLowerReturn). So
|
|
// replace multiple return values with a pointer parameter.
|
|
Results.clear();
|
|
Params.push_back(PtrVT);
|
|
}
|
|
|
|
for (auto *Param : Ty->params())
|
|
computeLegalValueVTs(F, TM, Param, Params);
|
|
if (Ty->isVarArg())
|
|
Params.push_back(PtrVT);
|
|
}
|
|
|
|
void llvm::valTypesFromMVTs(const ArrayRef<MVT> &In,
|
|
SmallVectorImpl<wasm::ValType> &Out) {
|
|
for (MVT Ty : In)
|
|
Out.push_back(WebAssembly::toValType(Ty));
|
|
}
|
|
|
|
std::unique_ptr<wasm::WasmSignature>
|
|
llvm::signatureFromMVTs(const SmallVectorImpl<MVT> &Results,
|
|
const SmallVectorImpl<MVT> &Params) {
|
|
auto Sig = make_unique<wasm::WasmSignature>();
|
|
valTypesFromMVTs(Results, Sig->Returns);
|
|
valTypesFromMVTs(Params, Sig->Params);
|
|
return Sig;
|
|
}
|
|
|
|
yaml::WebAssemblyFunctionInfo::WebAssemblyFunctionInfo(
|
|
const llvm::WebAssemblyFunctionInfo &MFI) {}
|
|
|
|
void yaml::WebAssemblyFunctionInfo::mappingImpl(yaml::IO &YamlIO) {
|
|
MappingTraits<WebAssemblyFunctionInfo>::mapping(YamlIO, *this);
|
|
}
|
|
|
|
void WebAssemblyFunctionInfo::initializeBaseYamlFields(
|
|
const yaml::WebAssemblyFunctionInfo &YamlMFI) {}
|