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C++ ParameterSymbol::setParameterOffset方法代码示例

本文整理汇总了C++中tr::ParameterSymbol::setParameterOffset方法的典型用法代码示例。如果您正苦于以下问题:C++ ParameterSymbol::setParameterOffset方法的具体用法?C++ ParameterSymbol::setParameterOffset怎么用?C++ ParameterSymbol::setParameterOffset使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在tr::ParameterSymbol的用法示例。


在下文中一共展示了ParameterSymbol::setParameterOffset方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: if

void
TR::AMD64ABILinkage::mapIncomingParms(
      TR::ResolvedMethodSymbol *method,
      uint32_t &stackIndex)
   {
   ListIterator<TR::ParameterSymbol> parameterIterator(&method->getParameterList());
   TR::ParameterSymbol *parmCursor = parameterIterator.getFirst();

   if (!parmCursor) return;

   if (parmCursor->getLinkageRegisterIndex() < 0)
      {
      copyLinkageInfoToParameterSymbols();
      }

   // 1st: handle parameters which are passed through stack
   //
   TR::X86SystemLinkage::mapIncomingParms(method);

   // 2nd: handle parameters which are passed through linkage registers, but are
   // not assigned any register after RA (or say, by their first usage point,
   // a MOV is needed to load it from stack to register).
   //
   // AMD64 SysV ABI says that: a parameter is placed either in registers or
   // pushed on the stack, but can't take both.  So, for parms passed through
   // linkage registers but don't have physical registers assigned after RA,
   // we will allocate stack space in local variable region.
   //
   for (parmCursor = parameterIterator.getFirst(); parmCursor; parmCursor = parameterIterator.getNext())
      {
      if ((parmCursor->getLinkageRegisterIndex() >= 0) && (parmCursor->getAllocatedIndex() < 0 || hasToBeOnStack(parmCursor)))
         {
         uint32_t align = getAlignment(parmCursor->getDataType());
         uint32_t alignMinus1 = (align <= AMD64_STACK_SLOT_SIZE) ? (AMD64_STACK_SLOT_SIZE - 1) : (align - 1);
         uint32_t pos = -stackIndex;
         pos += parmCursor->getSize();
         pos = (pos + alignMinus1) & (~alignMinus1);
         stackIndex = -pos;
         parmCursor->setParameterOffset(stackIndex);

         if (comp()->getOption(TR_TraceCG))
            traceMsg(comp(), "mapIncomingParms setParameterOffset %d for param symbol (reg param without home location) %p, hasToBeOnStack() %d\n", parmCursor->getParameterOffset(), parmCursor, hasToBeOnStack(parmCursor));
         }
      else if (parmCursor->getLinkageRegisterIndex() >=0 && parmCursor->getAllocatedIndex() >= 0)
         {
         //parmCursor->setDontHaveStackSlot(0); // this is a hack , so as we could print stack layout table in createPrologue
         if (comp()->getOption(TR_TraceCG))
            traceMsg(comp(), "mapIncomingParms no need to set parm %p, for it has got register %d assigned\n", parmCursor, parmCursor->getAllocatedIndex());
         }
      }
   }
开发者ID:lmaisons,项目名称:omr,代码行数:51,代码来源:AMD64SystemLinkage.cpp


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