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69c19f7316
The following improvements are accomplished as a result of applying this patch: - Fixed frame objects' offsets (relative to either the virtual frame pointer or the stack pointer) are set before instruction selection is completed. There is no need to wait until Prologue/Epilogue Insertion is run to set them. - Calculation of final offsets of fixed frame objects is straightforward. It is no longer necessary to assign negative offsets to fixed objects for incoming arguments in order to distinguish them from the others. - Since a fixed object has its relative offset set during instruction selection, there is no need to conservatively set its alignment to 4. - It is no longer necessary to reorder non-fixed frame objects in MipsFrameLowering::adjustMipsStackFrame. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131915 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
//==--- MipsFrameLowering.h - Define frame lowering for Mips --*- 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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//
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPS_FRAMEINFO_H
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#define MIPS_FRAMEINFO_H
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#include "Mips.h"
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#include "MipsSubtarget.h"
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#include "llvm/Target/TargetFrameLowering.h"
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namespace llvm {
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class MipsSubtarget;
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class MipsFrameLowering : public TargetFrameLowering {
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protected:
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const MipsSubtarget &STI;
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public:
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explicit MipsFrameLowering(const MipsSubtarget &sti)
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: TargetFrameLowering(StackGrowsDown, 8, 0), STI(sti) {
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}
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bool targetHandlesStackFrameRounding() const;
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/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
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/// the function.
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void emitPrologue(MachineFunction &MF) const;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
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bool hasFP(const MachineFunction &MF) const;
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void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
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RegScavenger *RS) const;
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};
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} // End llvm namespace
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#endif
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