73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
//===- llvm/CodeGen/GlobalISel/CombinerInfo.h ------*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// Interface for Targets to specify which operations are combined how and when.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_INFO_H
|
|
#define LLVM_CODEGEN_GLOBALISEL_COMBINER_INFO_H
|
|
|
|
#include <cassert>
|
|
namespace llvm {
|
|
|
|
class GISelChangeObserver;
|
|
class LegalizerInfo;
|
|
class MachineInstr;
|
|
class MachineIRBuilder;
|
|
class MachineRegisterInfo;
|
|
|
|
// Contains information relevant to enabling/disabling various combines for a
|
|
// pass.
|
|
class CombinerInfo {
|
|
public:
|
|
CombinerInfo(bool AllowIllegalOps, bool ShouldLegalizeIllegal,
|
|
const LegalizerInfo *LInfo, bool OptEnabled, bool OptSize,
|
|
bool MinSize)
|
|
: IllegalOpsAllowed(AllowIllegalOps),
|
|
LegalizeIllegalOps(ShouldLegalizeIllegal), LInfo(LInfo),
|
|
EnableOpt(OptEnabled), EnableOptSize(OptSize), EnableMinSize(MinSize) {
|
|
assert(((AllowIllegalOps || !LegalizeIllegalOps) || LInfo) &&
|
|
"Expecting legalizerInfo when illegalops not allowed");
|
|
}
|
|
virtual ~CombinerInfo() = default;
|
|
/// If \p IllegalOpsAllowed is false, the CombinerHelper will make use of
|
|
/// the legalizerInfo to check for legality before each transformation.
|
|
bool IllegalOpsAllowed; // TODO: Make use of this.
|
|
|
|
/// If \p LegalizeIllegalOps is true, the Combiner will also legalize the
|
|
/// illegal ops that are created.
|
|
bool LegalizeIllegalOps; // TODO: Make use of this.
|
|
const LegalizerInfo *LInfo;
|
|
|
|
/// Whether optimizations should be enabled. This is to distinguish between
|
|
/// uses of the combiner unconditionally and only when optimizations are
|
|
/// specifically enabled/
|
|
bool EnableOpt;
|
|
/// Whether we're optimizing for size.
|
|
bool EnableOptSize;
|
|
/// Whether we're optimizing for minsize (-Oz).
|
|
bool EnableMinSize;
|
|
|
|
/// Attempt to combine instructions using MI as the root.
|
|
///
|
|
/// Use Observer to report the creation, modification, and erasure of
|
|
/// instructions. GISelChangeObserver will automatically report certain
|
|
/// kinds of operations. These operations are:
|
|
/// * Instructions that are newly inserted into the MachineFunction
|
|
/// * Instructions that are erased from the MachineFunction.
|
|
///
|
|
/// However, it is important to report instruction modification and this is
|
|
/// not automatic.
|
|
virtual bool combine(GISelChangeObserver &Observer, MachineInstr &MI,
|
|
MachineIRBuilder &B) const = 0;
|
|
};
|
|
} // namespace llvm
|
|
|
|
#endif
|