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//===-- X86.cpp --------------------------------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "X86.h"
namespace exegesis {
static llvm::Error makeError(llvm::Twine Msg) {
return llvm::make_error<llvm::StringError>(Msg,
llvm::inconvertibleErrorCode());
}
X86Filter::~X86Filter() = default;
// Test whether we can generate a snippet for this instruction.
llvm::Error X86Filter::shouldRun(const LLVMState &State,
const unsigned Opcode) const {
const auto &InstrInfo = State.getInstrInfo();
const llvm::MCInstrDesc &InstrDesc = InstrInfo.get(Opcode);
if (InstrDesc.isBranch() || InstrDesc.isIndirectBranch())
return makeError("Unsupported opcode: isBranch/isIndirectBranch");
if (InstrDesc.isCall() || InstrDesc.isReturn())
return makeError("Unsupported opcode: isCall/isReturn");
const auto OpcodeName = InstrInfo.getName(Opcode);
if (OpcodeName.startswith("POPF") || OpcodeName.startswith("PUSHF") ||
OpcodeName.startswith("ADJCALLSTACK")) {
return makeError("Unsupported opcode: Push/Pop/AdjCallStack");
}
return llvm::ErrorSuccess();
}
} // namespace exegesis
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