forked from OSchip/llvm-project
51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
// $Id$ -*-c++-*-
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//***************************************************************************
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// File:
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// MachineFrameInfo.cpp
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//
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// Purpose:
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// Interface to layout of stack frame on target machine.
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// Most functions of class MachineFrameInfo have to be machine-specific
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// so there is little code here.
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//
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// History:
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// 4/17/02 - Vikram Adve - Created
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//**************************************************************************/
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#include "llvm/Target/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineCodeForMethod.h"
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int
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MachineFrameInfo::getIncomingArgOffset(MachineCodeForMethod& mcInfo,
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unsigned argNum) const
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{
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assert(argsOnStackHaveFixedSize());
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unsigned relativeOffset = argNum * getSizeOfEachArgOnStack();
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bool growUp; // do args grow up or down
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int firstArg = getFirstIncomingArgOffset(mcInfo, growUp);
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int offset = growUp? firstArg + relativeOffset
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: firstArg - relativeOffset;
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return offset;
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}
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int
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MachineFrameInfo::getOutgoingArgOffset(MachineCodeForMethod& mcInfo,
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unsigned argNum) const
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{
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assert(argsOnStackHaveFixedSize());
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assert(((int) argNum - this->getNumFixedOutgoingArgs())
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<= (int) mcInfo.getMaxOptionalNumArgs());
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unsigned relativeOffset = argNum * getSizeOfEachArgOnStack();
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bool growUp; // do args grow up or down
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int firstArg = getFirstOutgoingArgOffset(mcInfo, growUp);
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int offset = growUp? firstArg + relativeOffset
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: firstArg - relativeOffset;
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return offset;
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}
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