b6fd39a3a7
Teach the register stackifier to rematerialize constants that have multiple uses instead of leaving them in registers. In the WebAssembly encoding, it's the same code size to materialize most constants as it is to read a value from a register. llvm-svn: 258142
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//=- WebAssemblyInstrInfo.h - WebAssembly Instruction Information -*- C++ -*-=//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file contains the WebAssembly implementation of the
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/// TargetInstrInfo class.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYINSTRINFO_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYINSTRINFO_H
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#include "WebAssemblyRegisterInfo.h"
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#include "llvm/Target/TargetInstrInfo.h"
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#define GET_INSTRINFO_HEADER
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#include "WebAssemblyGenInstrInfo.inc"
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namespace llvm {
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class WebAssemblySubtarget;
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class WebAssemblyInstrInfo final : public WebAssemblyGenInstrInfo {
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const WebAssemblyRegisterInfo RI;
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public:
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explicit WebAssemblyInstrInfo(const WebAssemblySubtarget &STI);
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const WebAssemblyRegisterInfo &getRegisterInfo() const { return RI; }
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bool isReallyTriviallyReMaterializable(const MachineInstr *MI,
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AliasAnalysis *AA) const override;
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void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
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DebugLoc DL, unsigned DestReg, unsigned SrcReg,
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bool KillSrc) const override;
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bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
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MachineBasicBlock *&FBB,
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SmallVectorImpl<MachineOperand> &Cond,
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bool AllowModify = false) const override;
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unsigned RemoveBranch(MachineBasicBlock &MBB) const override;
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unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
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MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
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DebugLoc DL) const override;
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bool
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ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
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};
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} // end namespace llvm
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#endif
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