93 lines
3.3 KiB
C++
93 lines
3.3 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)
|
|
: CFGStackified(MFI.isCFGStackified()) {}
|
|
|
|
void yaml::WebAssemblyFunctionInfo::mappingImpl(yaml::IO &YamlIO) {
|
|
MappingTraits<WebAssemblyFunctionInfo>::mapping(YamlIO, *this);
|
|
}
|
|
|
|
void WebAssemblyFunctionInfo::initializeBaseYamlFields(
|
|
const yaml::WebAssemblyFunctionInfo &YamlMFI) {
|
|
CFGStackified = YamlMFI.CFGStackified;
|
|
}
|