llvm/llvm/include/llvm/CodeGen/StackMaps.h

//===- StackMaps.h - StackMaps ----------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_STACKMAPS_H
#define LLVM_CODEGEN_STACKMAPS_H

#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/Support/Debug.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <vector>

namespace llvm {

class AsmPrinter;
class MCSymbol;
class MCExpr;
class MCStreamer;
class raw_ostream;
class TargetRegisterInfo;

/// MI-level stackmap operands.
///
/// MI stackmap operations take the form:
/// <id>, <numBytes>, live args...
class StackMapOpers { … };

/// MI-level patchpoint operands.
///
/// MI patchpoint operations take the form:
/// [<def>], <id>, <numBytes>, <target>, <numArgs>, <cc>, ...
///
/// IR patchpoint intrinsics do not have the <cc> operand because calling
/// convention is part of the subclass data.
///
/// SD patchpoint nodes do not have a def operand because it is part of the
/// SDValue.
///
/// Patchpoints following the anyregcc convention are handled specially. For
/// these, the stack map also records the location of the return value and
/// arguments.
class PatchPointOpers { … };

/// MI-level Statepoint operands
///
/// Statepoint operands take the form:
///   <id>, <num patch bytes >, <num call arguments>, <call target>,
///   [call arguments...],
///   <StackMaps::ConstantOp>, <calling convention>,
///   <StackMaps::ConstantOp>, <statepoint flags>,
///   <StackMaps::ConstantOp>, <num deopt args>, [deopt args...],
///   <StackMaps::ConstantOp>, <num gc pointer args>, [gc pointer args...],
///   <StackMaps::ConstantOp>, <num gc allocas>, [gc allocas args...],
///   <StackMaps::ConstantOp>, <num  entries in gc map>, [base/derived pairs]
///   base/derived pairs in gc map are logical indices into <gc pointer args>
///   section.
///   All gc pointers assigned to VRegs produce new value (in form of MI Def
///   operand) and are tied to it.
class StatepointOpers { … };

class StackMaps { … };

} // end namespace llvm

#endif // LLVM_CODEGEN_STACKMAPS_H