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// WebAssemblyMachineFunctionInfo.h-WebAssembly machine function info-*- C++ -*-
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file declares WebAssembly-specific per-machine-function
/// information.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMACHINEFUNCTIONINFO_H
#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMACHINEFUNCTIONINFO_H
#include "WebAssemblyRegisterInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
namespace llvm {
/// This class is derived from MachineFunctionInfo and contains private
/// WebAssembly-specific information for each MachineFunction.
class WebAssemblyFunctionInfo final : public MachineFunctionInfo {
MachineFunction &MF;
std::vector<MVT> Params;
std::vector<MVT> Results;
/// A mapping from CodeGen vreg index to WebAssembly register number.
std::vector<unsigned> WARegs;
public:
explicit WebAssemblyFunctionInfo(MachineFunction &MF) : MF(MF) {}
~WebAssemblyFunctionInfo() override;
void addParam(MVT VT) { Params.push_back(VT); }
const std::vector<MVT> &getParams() const { return Params; }
void addResult(MVT VT) { Results.push_back(VT); }
const std::vector<MVT> &getResults() const { return Results; }
static const unsigned UnusedReg = -1u;
void initWARegs();
void setWAReg(unsigned VReg, unsigned WAReg) {
assert(WAReg != UnusedReg);
WARegs[TargetRegisterInfo::virtReg2Index(VReg)] = WAReg;
}
unsigned getWAReg(unsigned VReg) const {
return WARegs[TargetRegisterInfo::virtReg2Index(VReg)];
}
};
} // end namespace llvm
#endif
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