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https://github.com/c64scene-ar/llvm-6502.git
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0651a556fe
address of the stack guard was being spilled to the stack. Previously the address of the stack guard would get spilled to the stack if it was impossible to keep it in a register. This patch introduces a new target independent node and pseudo instruction which gets expanded post-RA to a sequence of instructions that load the stack guard value. Register allocator can now just remat the value when it can't keep it in a register. <rdar://problem/12475629> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213967 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
//===-- ARMInstrInfo.h - ARM 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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// This file contains the ARM implementation of the TargetInstrInfo class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ARMINSTRUCTIONINFO_H
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#define ARMINSTRUCTIONINFO_H
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#include "ARMBaseInstrInfo.h"
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#include "ARMRegisterInfo.h"
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namespace llvm {
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class ARMSubtarget;
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class ARMInstrInfo : public ARMBaseInstrInfo {
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ARMRegisterInfo RI;
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public:
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explicit ARMInstrInfo(const ARMSubtarget &STI);
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/// getNoopForMachoTarget - Return the noop instruction to use for a noop.
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void getNoopForMachoTarget(MCInst &NopInst) const override;
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// Return the non-pre/post incrementing version of 'Opc'. Return 0
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// if there is not such an opcode.
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unsigned getUnindexedOpcode(unsigned Opc) const override;
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/// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As
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/// such, whenever a client has an instance of instruction info, it should
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/// always be able to get register info as well (through this method).
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///
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const ARMRegisterInfo &getRegisterInfo() const override { return RI; }
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private:
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void expandLoadStackGuard(MachineBasicBlock::iterator MI,
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Reloc::Model RM) const override;
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};
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}
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#endif
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