mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
d71295a684
implementation of a Target{RegInfo, InstrInfo, Machine, etc} now has a separate
header and a separate implementation file.
This means that instead of a massive SparcInternals.h that forces a
recompilation of the whole target whenever a minor detail is changed, you should
only recompile a few files.
Note that SparcInternals.h is still around; its contents should be minimized.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10500 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
//===-- Sparc.cpp - General implementation file for the Sparc Target ------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Interface to stack frame layout info for the UltraSPARC. Starting offsets
|
|
// for each area of the stack frame are aligned at a multiple of
|
|
// getStackFrameSizeAlignment().
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFunctionInfo.h"
|
|
#include "llvm/Target/TargetFrameInfo.h"
|
|
#include "SparcFrameInfo.h"
|
|
|
|
using namespace llvm;
|
|
|
|
int
|
|
SparcFrameInfo::getFirstAutomaticVarOffset(MachineFunction&, bool& pos) const {
|
|
pos = false; // static stack area grows downwards
|
|
return StaticAreaOffsetFromFP;
|
|
}
|
|
|
|
int
|
|
SparcFrameInfo::getRegSpillAreaOffset(MachineFunction& mcInfo, bool& pos) const
|
|
{
|
|
// ensure no more auto vars are added
|
|
mcInfo.getInfo()->freezeAutomaticVarsArea();
|
|
|
|
pos = false; // static stack area grows downwards
|
|
unsigned autoVarsSize = mcInfo.getInfo()->getAutomaticVarsSize();
|
|
return StaticAreaOffsetFromFP - autoVarsSize;
|
|
}
|
|
|
|
int SparcFrameInfo::getTmpAreaOffset(MachineFunction& mcInfo, bool& pos) const {
|
|
MachineFunctionInfo *MFI = mcInfo.getInfo();
|
|
MFI->freezeAutomaticVarsArea(); // ensure no more auto vars are added
|
|
MFI->freezeSpillsArea(); // ensure no more spill slots are added
|
|
|
|
pos = false; // static stack area grows downwards
|
|
unsigned autoVarsSize = MFI->getAutomaticVarsSize();
|
|
unsigned spillAreaSize = MFI->getRegSpillsSize();
|
|
int offset = autoVarsSize + spillAreaSize;
|
|
return StaticAreaOffsetFromFP - offset;
|
|
}
|
|
|
|
int
|
|
SparcFrameInfo::getDynamicAreaOffset(MachineFunction& mcInfo, bool& pos) const {
|
|
// Dynamic stack area grows downwards starting at top of opt-args area.
|
|
// The opt-args, required-args, and register-save areas are empty except
|
|
// during calls and traps, so they are shifted downwards on each
|
|
// dynamic-size alloca.
|
|
pos = false;
|
|
unsigned optArgsSize = mcInfo.getInfo()->getMaxOptionalArgsSize();
|
|
if (int extra = optArgsSize % getStackFrameSizeAlignment())
|
|
optArgsSize += (getStackFrameSizeAlignment() - extra);
|
|
int offset = optArgsSize + FirstOptionalOutgoingArgOffsetFromSP;
|
|
assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0);
|
|
return offset;
|
|
}
|