llvm/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCExpr.h

//===- AMDGPUMCExpr.h - AMDGPU specific MC expression classes ---*- 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_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUMCEXPR_H
#define LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUMCEXPR_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/MC/MCExpr.h"

namespace llvm {

class Function;
class GCNSubtarget;

/// AMDGPU target specific MCExpr operations.
///
/// Takes in a minimum of 1 argument to be used with an operation. The supported
/// operations are:
///   - (bitwise) or
///   - max
///
/// \note If the 'or'/'max' operations are provided only a single argument, the
/// operation will act as a no-op and simply resolve as the provided argument.
///
class AMDGPUMCExpr : public MCTargetExpr { … };

namespace AMDGPU {
// Tries to leverage KnownBits for MCExprs to reduce and limit any composed
// MCExprs printing. E.g., for an expression such as
// ((unevaluatable_sym | 1) & 1) won't evaluate due to unevaluatable_sym and
// would verbosely print the full expression; however, KnownBits should deduce
// the value to be 1. Particularly useful for AMDGPU metadata MCExprs.
void printAMDGPUMCExpr(const MCExpr *Expr, raw_ostream &OS,
                       const MCAsmInfo *MAI);

const MCExpr *foldAMDGPUMCExpr(const MCExpr *Expr, MCContext &Ctx);

} // end namespace AMDGPU
} // end namespace llvm

#endif // LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUMCEXPR_H