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//===- 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
//
//===----------------------------------------------------------------------===//
/// \file
/// Option class for Targets to specify which operations are combined how and
/// when.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_GLOBALISEL_COMBINERINFO_H
#define LLVM_CODEGEN_GLOBALISEL_COMBINERINFO_H
#include <cassert>
namespace llvm {
class LegalizerInfo;
// Contains information relevant to enabling/disabling various combines for a
// pass.
struct CombinerInfo {
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;
/// The maximum number of times the Combiner will iterate over the
/// MachineFunction. Setting this to 0 enables fixed-point iteration.
unsigned MaxIterations = 0;
};
} // namespace llvm
#endif
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