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//===- llvm/CodeGen/GlobalISel/CombinerInfo.h ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// 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 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,
LegalizerInfo *LInfo)
: IllegalOpsAllowed(AllowIllegalOps),
LegalizeIllegalOps(ShouldLegalizeIllegal), LInfo(LInfo) {
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;
virtual bool combine(MachineInstr &MI, MachineIRBuilder &B) const = 0;
};
} // namespace llvm
#endif
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