//===---- MipsCCState.cpp - CCState with Mips specific extensions ---------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "MipsCCState.h"
#include "MipsSubtarget.h"
#include "llvm/IR/Module.h"

using namespace llvm;

MipsCCState::SpecialCallingConvType
MipsCCState::getSpecialCallingConvForCallee(const SDNode *Callee,
                                            const MipsSubtarget &Subtarget) {
  MipsCCState::SpecialCallingConvType SpecialCallingConv = NoSpecialCallingConv;
  if (Subtarget.inMips16HardFloat()) {
    if (const GlobalAddressSDNode *G =
            dyn_cast<const GlobalAddressSDNode>(Callee)) {
      llvm::StringRef Sym = G->getGlobal()->getName();
      Function *F = G->getGlobal()->getParent()->getFunction(Sym);
      if (F && F->hasFnAttribute("__Mips16RetHelper")) {
        SpecialCallingConv = Mips16RetHelperConv;
      }
    }
  }
  return SpecialCallingConv;
}