Beispiel #1
0
TR_RuntimeHelper TR::S390CallSnippet::getInterpretedDispatchHelper(
   TR::SymbolReference *methodSymRef,
   TR::DataType        type)
   {
   TR::Compilation *comp = cg()->comp();
   TR::MethodSymbol * methodSymbol = methodSymRef->getSymbol()->castToMethodSymbol();
   bool isJitInduceOSRCall = false;
   if (methodSymbol->isHelper() &&
       methodSymRef->isOSRInductionHelper())
      {
      isJitInduceOSRCall = true;
      }

   if (methodSymRef->isUnresolved() || comp->compileRelocatableCode())
      {
      TR_ASSERT(!isJitInduceOSRCall || !comp->compileRelocatableCode(), "calling jitInduceOSR is not supported yet under AOT\n");
      if (methodSymbol->isSpecial())
         return TR_S390interpreterUnresolvedSpecialGlue;
      else if (methodSymbol->isStatic())
         return TR_S390interpreterUnresolvedStaticGlue;
      else
         return TR_S390interpreterUnresolvedDirectVirtualGlue;
      }
   else if (isJitInduceOSRCall)
      return (TR_RuntimeHelper) methodSymRef->getReferenceNumber();
   else
      return getHelper(methodSymbol, type, cg());
   }
Beispiel #2
0
// resolved casts that are not to abstract, interface, or array need a super test
bool OMR::TreeEvaluator::instanceOfOrCheckCastNeedSuperTest(TR::Node * node, TR::CodeGenerator *cg)
   {
   TR::Node            *castClassNode    = node->getSecondChild();
   TR::MethodSymbol    *helperSym        = node->getSymbol()->castToMethodSymbol();
   TR::SymbolReference *castClassSymRef  = castClassNode->getSymbolReference();

   if (!TR::TreeEvaluator::isStaticClassSymRef(castClassSymRef))
      {
      // We could theoretically do a super test on something with no sym, but it would require significant
      // changes to platform code. The benefit is little at this point (shows up from reference arraycopy reductions)

      if (cg->supportsInliningOfIsInstance() &&
          node->getOpCodeValue() == TR::instanceof &&
          node->getSecondChild()->getOpCodeValue() != TR::loadaddr)
         return true;
      else
         return false;
      }

   TR::StaticSymbol    *castClassSym = castClassSymRef->getSymbol()->getStaticSymbol();

   if (castClassSymRef->isUnresolved())
      {
      return false;
      }
   else
      {
      TR_OpaqueClassBlock * clazz;
      // If the class is a regular class (i.e., not an interface nor an array) and
      // not known to be a final class, an inline superclass test can be generated.
      // If the helper does not preserve all the registers there will not be
      // enough registers to do the superclass test inline.
      // Also, don't generate the superclass test if optimizing for space.
      //
      if (castClassSym &&
          (clazz = (TR_OpaqueClassBlock *) castClassSym->getStaticAddress()) &&
          !TR::Compiler->cls.isClassArray(cg->comp(), clazz) &&
          !TR::Compiler->cls.isInterfaceClass(cg->comp(), clazz) &&
          !TR::Compiler->cls.isClassFinal(cg->comp(), clazz) &&
           helperSym->preservesAllRegisters() &&
          !cg->comp()->getOption(TR_OptimizeForSpace))
         return true;
      }
   return false;
   }
Beispiel #3
0
bool
OMR::SymbolReference::isUnresolvedMethodInCP(TR::Compilation *c)
   {
   TR_ASSERT(c->compileRelocatableCode() && self()->getSymbol()->isMethod(), "isUnresolvedMethodInCP only callable in AOT compiles on method symbols");

   if (!self()->isUnresolved())
      return false;

   if (c->getOption(TR_DisablePeekAOTResolutions))
      return true;

   TR::MethodSymbol *sym = self()->getSymbol()->getMethodSymbol();
   if (sym->isStatic())
      return self()->getOwningMethod(c)->getUnresolvedStaticMethodInCP(self()->getCPIndex());
   else if (sym->isSpecial())
      return self()->getOwningMethod(c)->getUnresolvedSpecialMethodInCP(self()->getCPIndex());
   else if (sym->isVirtual())
      return self()->getOwningMethod(c)->getUnresolvedVirtualMethodInCP(self()->getCPIndex());
   else
      return true;
   }
Beispiel #4
0
TR::Register *TR::IA32SystemLinkage::buildDirectDispatch(TR::Node *callNode, bool spillFPRegs)
   {
   TR::RealRegister    *stackPointerReg = machine()->getX86RealRegister(TR::RealRegister::esp);
   TR::SymbolReference *methodSymRef    = callNode->getSymbolReference();
   TR::MethodSymbol    *methodSymbol    = callNode->getSymbol()->castToMethodSymbol();
   TR::ILOpCodes        callOpCodeValue = callNode->getOpCodeValue();

   if (!methodSymbol->isHelper())
      diagnostic("Building call site for %s\n", methodSymbol->getMethod()->signature(trMemory()));

   TR::RegisterDependencyConditions  *deps;
   deps = generateRegisterDependencyConditions((uint8_t)0, (uint8_t)6, cg());
   TR::Register *returnReg = buildVolatileAndReturnDependencies(callNode, deps);
   deps->stopAddingConditions();

   TR::RegisterDependencyConditions  *dummy = generateRegisterDependencyConditions((uint8_t)0, (uint8_t)0, cg());

   uint32_t  argSize = buildArgs(callNode, dummy);

   TR::Register* targetAddressReg = NULL;
   TR::MemoryReference* targetAddressMem = NULL;

   // Call-out
   int32_t stackAdjustment = cg()->getProperties().getCallerCleanup() ? 0 : -argSize;
   TR::X86ImmInstruction* instr = generateImmSymInstruction(CALLImm4, callNode, (uintptr_t)methodSymbol->getMethodAddress(), methodSymRef, cg());
   instr->setAdjustsFramePointerBy(stackAdjustment);

   if (cg()->getProperties().getCallerCleanup() && argSize > 0)
      {
      // Clean up arguments
      //
      generateRegImmInstruction(
         (argSize <= 127) ? ADD4RegImms : ADD4RegImm4,
         callNode,
         stackPointerReg,
         argSize,
         cg()
         );
      }

   // Label denoting end of dispatch code sequence; dependencies are on
   // this label rather than on the call
   //
   TR::LabelSymbol *endSystemCallSequence = generateLabelSymbol(cg());
   generateLabelInstruction(LABEL, callNode, endSystemCallSequence, deps, cg());

   // Stop using the killed registers that are not going to persist
   //
   if (deps)
      stopUsingKilledRegisters(deps, returnReg);

   // If the method returns a floating point value that is not used, insert a dummy store to
   // eventually pop the value from the floating point stack.
   //
   if ((callNode->getDataType() == TR::Float ||
        callNode->getDataType() == TR::Double) &&
       callNode->getReferenceCount() == 1)
      {
      generateFPSTiST0RegRegInstruction(FSTRegReg, callNode, returnReg, returnReg, cg());
      }

   if (cg()->enableRegisterAssociations())
      associatePreservedRegisters(deps, returnReg);

   return returnReg;
   }
Beispiel #5
0
TR::Register *TR::AMD64SystemLinkage::buildDirectDispatch(
      TR::Node *callNode,
      bool spillFPRegs)
   {
   TR::SymbolReference *methodSymRef = callNode->getSymbolReference();
   TR::MethodSymbol *methodSymbol = methodSymRef->getSymbol()->castToMethodSymbol();

   TR::Register *returnReg;

   // Allocate adequate register dependencies.
   //
   // pre = number of argument registers
   // post = number of volatile + return register
   //
   uint32_t pre = getProperties().getNumIntegerArgumentRegisters() + getProperties().getNumFloatArgumentRegisters();
   uint32_t post = getProperties().getNumVolatileRegisters() + (callNode->getDataType() == TR::NoType ? 0 : 1);

#if defined (PYTHON) && 0
   // Treat all preserved GP regs as volatile until register map support available.
   //
   post += getProperties().getNumberOfPreservedGPRegisters();
#endif

   TR::RegisterDependencyConditions *preDeps = generateRegisterDependencyConditions(pre, 0, cg());
   TR::RegisterDependencyConditions *postDeps = generateRegisterDependencyConditions(0, post, cg());

   // Evaluate outgoing arguments on the system stack and build pre-conditions.
   //
   int32_t memoryArgSize = buildArgs(callNode, preDeps);

   // Build post-conditions.
   //
   returnReg = buildVolatileAndReturnDependencies(callNode, postDeps);
   postDeps->stopAddingPostConditions();

   // Find the second scratch register in the post dependency list.
   //
   TR::Register *scratchReg = NULL;
   TR::RealRegister::RegNum scratchRegIndex = getProperties().getIntegerScratchRegister(1);
   for (int32_t i=0; i<post; i++)
      {
      if (postDeps->getPostConditions()->getRegisterDependency(i)->getRealRegister() == scratchRegIndex)
         {
         scratchReg = postDeps->getPostConditions()->getRegisterDependency(i)->getRegister();
         break;
         }
      }

#if defined(PYTHON) && 0
   // For Python, store the instruction that contains the GC map at this site into
   // the frame object.
   //
   TR::SymbolReference *frameObjectSymRef =
      comp()->getSymRefTab()->findOrCreateAutoSymbol(comp()->getMethodSymbol(), 0, TR::Address, true, false, true);

   TR::Register *frameObjectRegister = cg()->allocateRegister();
   generateRegMemInstruction(
         L8RegMem,
         callNode,
         frameObjectRegister,
         generateX86MemoryReference(frameObjectSymRef, cg()),
         cg());

   TR::RealRegister *espReal = cg()->machine()->getX86RealRegister(TR::RealRegister::esp);
   TR::Register *gcMapPCRegister = cg()->allocateRegister();

   generateRegMemInstruction(
         LEA8RegMem,
         callNode,
         gcMapPCRegister,
         generateX86MemoryReference(espReal, -8, cg()),
         cg());

   // Use "volatile" registers across the call.  Once proper register map support
   // is implemented, r14 and r15 will no longer be volatile and a different pair
   // should be chosen.
   //
   TR::RegisterDependencyConditions *gcMapDeps = generateRegisterDependencyConditions(0, 2, cg());
   gcMapDeps->addPostCondition(frameObjectRegister, TR::RealRegister::r14, cg());
   gcMapDeps->addPostCondition(gcMapPCRegister, TR::RealRegister::r15, cg());
   gcMapDeps->stopAddingPostConditions();

   generateMemRegInstruction(
         S8MemReg,
         callNode,
         generateX86MemoryReference(frameObjectRegister, fe()->getPythonGCMapPCOffsetInFrame(), cg()),
         gcMapPCRegister,
         gcMapDeps,
         cg());

   cg()->stopUsingRegister(frameObjectRegister);
   cg()->stopUsingRegister(gcMapPCRegister);
#endif

   TR::Instruction *instr;
   if (methodSymbol->getMethodAddress())
      {
      TR_ASSERT(scratchReg, "could not find second scratch register");
      auto LoadRegisterInstruction = generateRegImm64SymInstruction(
         MOV8RegImm64,
         callNode,
         scratchReg,
         (uintptr_t)methodSymbol->getMethodAddress(),
         methodSymRef,
         cg());

      if (TR::Options::getCmdLineOptions()->getOption(TR_EmitRelocatableELFFile))
         {
         LoadRegisterInstruction->setReloKind(TR_NativeMethodAbsolute);
         }

      instr = generateRegInstruction(CALLReg, callNode, scratchReg, preDeps, cg());
      }
   else
      {
      instr = generateImmSymInstruction(CALLImm4, callNode, (uintptrj_t)methodSymbol->getMethodAddress(), methodSymRef, preDeps, cg());
      }

   cg()->resetIsLeafMethod();

   instr->setNeedsGCMap(getProperties().getPreservedRegisterMapForGC());

   cg()->stopUsingRegister(scratchReg);

   TR::LabelSymbol *postDepLabel = generateLabelSymbol(cg());
   generateLabelInstruction(LABEL, callNode, postDepLabel, postDeps, cg());

   return returnReg;
   }
Beispiel #6
0
TR::Register *TR::ARM64SystemLinkage::buildDirectDispatch(TR::Node *callNode)
   {
   TR::SymbolReference *callSymRef = callNode->getSymbolReference();

   const TR::ARM64LinkageProperties &pp = getProperties();
   TR::RealRegister *sp = cg()->machine()->getRealRegister(pp.getStackPointerRegister());

   TR::RegisterDependencyConditions *dependencies =
      new (trHeapMemory()) TR::RegisterDependencyConditions(
         pp.getNumberOfDependencyGPRegisters(),
         pp.getNumberOfDependencyGPRegisters(), trMemory());

   int32_t totalSize = buildArgs(callNode, dependencies);
   if (totalSize > 0)
      {
      if (constantIsUnsignedImm12(totalSize))
         {
         generateTrg1Src1ImmInstruction(cg(), TR::InstOpCode::subimmx, callNode, sp, sp, totalSize);
         }
      else
         {
         TR_ASSERT_FATAL(false, "Too many arguments.");
         }
      }

   TR::MethodSymbol *callSymbol = callSymRef->getSymbol()->castToMethodSymbol();
   generateImmSymInstruction(cg(), TR::InstOpCode::bl, callNode,
      (uintptr_t)callSymbol->getMethodAddress(),
      dependencies, callSymRef ? callSymRef : callNode->getSymbolReference(), NULL);

   cg()->machine()->setLinkRegisterKilled(true);

   if (totalSize > 0)
      {
      if (constantIsUnsignedImm12(totalSize))
         {
         generateTrg1Src1ImmInstruction(cg(), TR::InstOpCode::addimmx, callNode, sp, sp, totalSize);
         }
      else
         {
         TR_ASSERT_FATAL(false, "Too many arguments.");
         }
      }

   TR::Register *retReg;
   switch(callNode->getOpCodeValue())
      {
      case TR::icall:
      case TR::iucall:
         retReg = dependencies->searchPostConditionRegister(
                     pp.getIntegerReturnRegister());
         break;
      case TR::lcall:
      case TR::lucall:
      case TR::acall:
         retReg = dependencies->searchPostConditionRegister(
                     pp.getLongReturnRegister());
         break;
      case TR::fcall:
      case TR::dcall:
         retReg = dependencies->searchPostConditionRegister(
                     pp.getFloatReturnRegister());
         break;
      case TR::call:
         retReg = NULL;
         break;
      default:
         retReg = NULL;
         TR_ASSERT(false, "Unsupported direct call Opcode.");
      }

   callNode->setRegister(retReg);
   return retReg;
   }
Beispiel #7
0
TR_BitVector *
OMR::SymbolReference::getUseonlyAliasesBV(TR::SymbolReferenceTable * symRefTab)
   {
   int32_t kind = _symbol->getKind();
   switch (kind)
      {
      case TR::Symbol::IsMethod:
         {
         TR::MethodSymbol * methodSymbol = _symbol->castToMethodSymbol();

         // Aliasing for potentialOSRPointHelper
         // A potentialOSRPointHelper call is an exception point that may go to OSR catch block ( see
         // Node API exceptionsRaised), the control flow constraint imposed by the exception edge will
         // apply to all the global optimizations that may move things around. Local optimizations also
         // ask exceptionsRaised to determine if a code motion across certain point is safe. So aliasing
         // is not necessary. However, we'd like to add aliasing here to cause the compiler to be more
         // conservative about reordering this helper with other operations. The aliasing can always be
         // relaxed when necessary.
         //
         if (symRefTab->isNonHelper(self(), TR::SymbolReferenceTable::potentialOSRPointHelperSymbol))
            {
            return &symRefTab->aliasBuilder.defaultMethodUseAliases();
            }

         // Aliasing for osrFearPointHelper
         // Preventing the reordering of fear point helper w.r.t. OSR points and yield/invalidation points is
         // the minimum requirement of aliasing for OSR fear point helper. These reorderings would in almost
         // all cases be naturally disallowed simply due to the fact that the fear point is represented as a
         // call, which even without aliasing could e.g. perform I/O. Thus the following is a highly conservative
         // aliasing and can be relaxed later when necessary
         //
         if (symRefTab->isNonHelper(self(), TR::SymbolReferenceTable::osrFearPointHelperSymbol))
            {
            return &symRefTab->aliasBuilder.defaultMethodUseAliases();
            }

         if (!methodSymbol->isHelper())
            {
            return &symRefTab->aliasBuilder.defaultMethodUseAliases();
            }


         switch (self()->getReferenceNumber())
            {
            case TR_asyncCheck:
               return 0;

            // helpers that don't throw have no use aliases
            case TR_instanceOf:
            case TR_checkAssignable:
            case TR_monitorEntry:
            case TR_transactionEntry:
            case TR_reportFinalFieldModified:
            case TR_reportMethodEnter:
            case TR_reportStaticMethodEnter:
            case TR_reportMethodExit:
            case TR_acquireVMAccess:
            case TR_throwCurrentException:
            case TR_releaseVMAccess:
            case TR_stackOverflow:
            case TR_writeBarrierStore:
            case TR_writeBarrierStoreGenerational:
            case TR_writeBarrierStoreGenerationalAndConcurrentMark:
            case TR_writeBarrierBatchStore:
            case TR_typeCheckArrayStore:
            case TR_arrayStoreException:
            case TR_arrayBoundsCheck:
            case TR_checkCast:
            case TR_divCheck:
            case TR_overflowCheck:
            case TR_nullCheck:
            case TR_methodTypeCheck:
            case TR_incompatibleReceiver:
            case TR_IncompatibleClassChangeError:
            case TR_aThrow:
            case TR_aNewArray:
            case TR_monitorExit:
            case TR_transactionExit:
            case TR_newObject:
            case TR_newObjectNoZeroInit:
            case TR_newArray:
            case TR_multiANewArray:
            default:
               return &symRefTab->aliasBuilder.defaultMethodUseAliases();
            }
         }
      case TR::Symbol::IsResolvedMethod:
         {
         TR::ResolvedMethodSymbol * resolvedMethodSymbol = _symbol->castToResolvedMethodSymbol();
         if (!TR::comp()->getOption(TR_EnableHCR))
            {
            switch (resolvedMethodSymbol->getRecognizedMethod())
               {
#ifdef J9_PROJECT_SPECIFIC
               case TR::java_lang_Double_longBitsToDouble:
               case TR::java_lang_Double_doubleToLongBits:
               case TR::java_lang_Float_intBitsToFloat:
               case TR::java_lang_Float_floatToIntBits:
               case TR::java_lang_Double_doubleToRawLongBits:
               case TR::java_lang_Float_floatToRawIntBits:
               case TR::java_lang_Math_sqrt:
               case TR::java_lang_StrictMath_sqrt:
               case TR::java_lang_Math_sin:
               case TR::java_lang_StrictMath_sin:
               case TR::java_lang_Math_cos:
               case TR::java_lang_StrictMath_cos:
               case TR::java_lang_Math_max_I:
               case TR::java_lang_Math_min_I:
               case TR::java_lang_Math_max_L:
               case TR::java_lang_Math_min_L:
               case TR::java_lang_Math_abs_I:
               case TR::java_lang_Math_abs_L:
               case TR::java_lang_Math_abs_F:
               case TR::java_lang_Math_abs_D:
               case TR::java_lang_Math_pow:
               case TR::java_lang_StrictMath_pow:
               case TR::java_lang_Math_exp:
               case TR::java_lang_StrictMath_exp:
               case TR::java_lang_Math_log:
               case TR::java_lang_StrictMath_log:
               case TR::java_lang_Math_floor:
               case TR::java_lang_Math_ceil:
               case TR::java_lang_Math_copySign_F:
               case TR::java_lang_Math_copySign_D:
               case TR::java_lang_StrictMath_floor:
               case TR::java_lang_StrictMath_ceil:
               case TR::java_lang_StrictMath_copySign_F:
               case TR::java_lang_StrictMath_copySign_D:
                  return NULL;
#endif
               default:
               	break;
               }
            }
         return &symRefTab->aliasBuilder.defaultMethodUseAliases();
         }

      case TR::Symbol::IsAutomatic:
      case TR::Symbol::IsParameter:

         if (symRefTab->aliasBuilder.catchLocalUseSymRefs().isSet(self()->getReferenceNumber()))
            return &symRefTab->aliasBuilder.methodsThatMayThrow();

         return 0;

      default:
         //TR_ASSERT(0, "getUseOnlyAliases: unexpected symbol kind ");
         return 0;
      }
   }
Beispiel #8
0
TR_BitVector *
OMR::SymbolReference::getUseDefAliasesBV(bool isDirectCall, bool includeGCSafePoint)
   {
   TR::Compilation *comp = TR::comp();
   TR::Region &aliasRegion = comp->aliasRegion();
   int32_t bvInitialSize = comp->getSymRefCount();
   TR_BitVectorGrowable growability = growable;

   // allow more than one shadow for an array type.  Used by LoopAliasRefiner
   const bool supportArrayRefinement=true;

   int32_t kind = _symbol->getKind();
   TR::SymbolReferenceTable * symRefTab = comp->getSymRefTab();

   // !!! NOTE !!!
   // THERE IS A COPY OF THIS LOGIC IN sharesSymbol
   //
   if (!self()->reallySharesSymbol(comp))
      {
      switch (kind)
         {
         case TR::Symbol::IsShadow:
         case TR::Symbol::IsStatic:
            {
            // For unresolved constant dynamic, we need to invoke a Java bootstrap method,
            // which can have arbitrary side effects, so the aliasing should be conservative here.
            // isConstObjectRef now returns true for condy, so we add an explicit condition,
            // more like a short-circuit, to say if we are unresolved and not isConstObjectRef
            // (this is the same as before), or if we are unresolved and condy
            // (this is the extra condition added), we would return conservative aliases.
            if ((self()->isUnresolved() && (_symbol->isConstantDynamic() || !_symbol->isConstObjectRef())) ||
	        _symbol->isVolatile() || self()->isLiteralPoolAddress() ||
                self()->isFromLiteralPool() || _symbol->isUnsafeShadowSymbol() ||
                (_symbol->isArrayShadowSymbol() && comp->getMethodSymbol()->hasVeryRefinedAliasSets()))
               {
               // getUseDefAliases might not return NULL
               }
            else if (!symRefTab->aliasBuilder.mutableGenericIntShadowHasBeenCreated())
               {
               // getUseDefAliases must return NULL
               return NULL;
               }
            else if (kind == TR::Symbol::IsStatic && !symRefTab->aliasBuilder.litPoolGenericIntShadowHasBeenCreated())
               {
               // getUseDefAliases must return NULL
               return NULL;
               }
            break;
            }
         }
      }

   // now do stuff for various kinds of symbols
   //
   switch (kind)
      {
      case TR::Symbol::IsMethod:
         {
         TR::MethodSymbol * methodSymbol = _symbol->castToMethodSymbol();

         if (!methodSymbol->isHelper())
            return symRefTab->aliasBuilder.methodAliases(self());

         if (symRefTab->isNonHelper(self(), TR::SymbolReferenceTable::arraySetSymbol) ||
             symRefTab->isNonHelper(self(), TR::SymbolReferenceTable::osrFearPointHelperSymbol) ||
             symRefTab->isNonHelper(self(), TR::SymbolReferenceTable::potentialOSRPointHelperSymbol))
            {
            return &symRefTab->aliasBuilder.defaultMethodDefAliases();
            }

         if (symRefTab->isNonHelper(self(), TR::SymbolReferenceTable::arrayCmpSymbol))
            return 0;

         switch (self()->getReferenceNumber())
            {
            case TR_methodTypeCheck:
            case TR_nullCheck:
               return &symRefTab->aliasBuilder.defaultMethodDefAliasesWithoutImmutable();

            case TR_arrayBoundsCheck:
            case TR_checkCast:
            case TR_divCheck:
            case TR_typeCheckArrayStore:
            case TR_arrayStoreException:
            case TR_incompatibleReceiver:
            case TR_IncompatibleClassChangeError:
            case TR_reportFinalFieldModified:
            case TR_reportMethodEnter:
            case TR_reportStaticMethodEnter:
            case TR_reportMethodExit:
            case TR_acquireVMAccess:
            case TR_instanceOf:
            case TR_checkAssignable:
            case TR_throwCurrentException:
            case TR_releaseVMAccess:
            case TR_stackOverflow:
            case TR_writeBarrierStore:
            case TR_writeBarrierBatchStore:
            case TR_jitProfileAddress:
            case TR_jitProfileWarmCompilePICAddress:
            case TR_jitProfileValue:
            case TR_jitProfileLongValue:
            case TR_jitProfileBigDecimalValue:
            case TR_jitProfileParseBuffer:

               return 0;

            case TR_asyncCheck:
            case TR_writeBarrierClassStoreRealTimeGC:
            case TR_writeBarrierStoreRealTimeGC:
            case TR_aNewArray:
            case TR_newObject:
            case TR_newObjectNoZeroInit:
            case TR_newArray:
            case TR_multiANewArray:
               if ((comp->generateArraylets() || comp->isDLT()) && includeGCSafePoint)
                  return &symRefTab->aliasBuilder.gcSafePointSymRefNumbers();
               else
                  return 0;

            case TR_aThrow:
               return 0;

            // The monitor exit symbol needs to be aliased with all fields in the
            // current class to ensure that all references to fields are evaluated
            // before the monitor exit
            case TR_monitorExit:
            case TR_monitorEntry:
            case TR_transactionExit:
            case TR_transactionEntry:

            default:
               // The following is the place to check for
               // a use of killsAllMethodSymbolRef... However,
               // it looks like the default action is sufficient.
               //if (symRefTab->findKillsAllMethodSymbolRef() == self())
               //   {
               //   }
               return &symRefTab->aliasBuilder.defaultMethodDefAliases();
            }
         }
      case TR::Symbol::IsResolvedMethod:
         {
         TR::ResolvedMethodSymbol * resolvedMethodSymbol = _symbol->castToResolvedMethodSymbol();

         if (!comp->getOption(TR_EnableHCR))
            {
            switch (resolvedMethodSymbol->getRecognizedMethod())
               {
#ifdef J9_PROJECT_SPECIFIC
               case TR::java_lang_System_arraycopy:
                  {
                  TR_BitVector * aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
                  *aliases |= symRefTab->aliasBuilder.arrayElementSymRefs();
                  if (comp->generateArraylets())
                     *aliases |= symRefTab->aliasBuilder.arrayletElementSymRefs();
                  return aliases;
                  }

                  if (resolvedMethodSymbol->isPureFunction())
                      return NULL;

               case TR::java_lang_Double_longBitsToDouble:
               case TR::java_lang_Double_doubleToLongBits:
               case TR::java_lang_Float_intBitsToFloat:
               case TR::java_lang_Float_floatToIntBits:
               case TR::java_lang_Double_doubleToRawLongBits:
               case TR::java_lang_Float_floatToRawIntBits:
               case TR::java_lang_Math_sqrt:
               case TR::java_lang_StrictMath_sqrt:
               case TR::java_lang_Math_sin:
               case TR::java_lang_StrictMath_sin:
               case TR::java_lang_Math_cos:
               case TR::java_lang_StrictMath_cos:
               case TR::java_lang_Math_max_I:
               case TR::java_lang_Math_min_I:
               case TR::java_lang_Math_max_L:
               case TR::java_lang_Math_min_L:
               case TR::java_lang_Math_abs_I:
               case TR::java_lang_Math_abs_L:
               case TR::java_lang_Math_abs_F:
               case TR::java_lang_Math_abs_D:
               case TR::java_lang_Math_pow:
               case TR::java_lang_StrictMath_pow:
               case TR::java_lang_Math_exp:
               case TR::java_lang_StrictMath_exp:
               case TR::java_lang_Math_log:
               case TR::java_lang_StrictMath_log:
               case TR::java_lang_Math_floor:
               case TR::java_lang_Math_ceil:
               case TR::java_lang_Math_copySign_F:
               case TR::java_lang_Math_copySign_D:
               case TR::java_lang_StrictMath_floor:
               case TR::java_lang_StrictMath_ceil:
               case TR::java_lang_StrictMath_copySign_F:
               case TR::java_lang_StrictMath_copySign_D:
               case TR::com_ibm_Compiler_Internal__TR_Prefetch:
               case TR::java_nio_Bits_keepAlive:
                  if ((comp->generateArraylets() || comp->isDLT()) && includeGCSafePoint)
                     return &symRefTab->aliasBuilder.gcSafePointSymRefNumbers();
                  else
                     return 0;

               // no aliasing on DFP dummy stubs
               case TR::java_math_BigDecimal_DFPPerformHysteresis:
               case TR::java_math_BigDecimal_DFPUseDFP:
               case TR::java_math_BigDecimal_DFPHWAvailable:
               case TR::java_math_BigDecimal_DFPCompareTo:
               case TR::java_math_BigDecimal_DFPUnscaledValue:
               case TR::com_ibm_dataaccess_DecimalData_DFPFacilityAvailable:
               case TR::com_ibm_dataaccess_DecimalData_DFPUseDFP:
               case TR::com_ibm_dataaccess_DecimalData_DFPConvertPackedToDFP:
               case TR::com_ibm_dataaccess_DecimalData_DFPConvertDFPToPacked:
               case TR::com_ibm_dataaccess_DecimalData_createZeroBigDecimal:
               case TR::com_ibm_dataaccess_DecimalData_getlaside:
               case TR::com_ibm_dataaccess_DecimalData_setlaside:
               case TR::com_ibm_dataaccess_DecimalData_getflags:
               case TR::com_ibm_dataaccess_DecimalData_setflags:
                  if (!(
#ifdef TR_TARGET_S390
                     TR::Compiler->target.cpu.getS390SupportsDFP() ||
#endif
                      TR::Compiler->target.cpu.supportsDecimalFloatingPoint()) ||
                      comp->getOption(TR_DisableDFP))
                     return NULL;
#endif //J9_PROJECT_SPECIFIC
               default:
               	break;
               }
            }

#ifdef J9_PROJECT_SPECIFIC
         TR_ResolvedMethod * method = resolvedMethodSymbol->getResolvedMethod();
         TR_PersistentMethodInfo * methodInfo = TR_PersistentMethodInfo::get(method);
         if (methodInfo && (methodInfo->hasRefinedAliasSets() ||
                            comp->getMethodHotness() >= veryHot ||
                            resolvedMethodSymbol->hasVeryRefinedAliasSets()) &&
             (method->isStatic() || method->isFinal() || isDirectCall))
            {
            TR_BitVector * aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            if ((comp->generateArraylets() || comp->isDLT()) && includeGCSafePoint)
               *aliases |= symRefTab->aliasBuilder.gcSafePointSymRefNumbers();

            if (methodInfo->doesntKillAnything() && !comp->getOption(TR_DisableRefinedAliases))
               return aliases;

            if ((resolvedMethodSymbol->hasVeryRefinedAliasSets() || comp->getMethodHotness() >= hot) &&
                !debug("disableVeryRefinedCallAliasSets"))
               {
               TR_BitVector * exactAliases = 0;

               if (resolvedMethodSymbol->hasVeryRefinedAliasSets())
                  exactAliases = symRefTab->aliasBuilder.getVeryRefinedCallAliasSets(resolvedMethodSymbol);
               else
                  {
                  resolvedMethodSymbol->setHasVeryRefinedAliasSets(true);
                  List<void> methodsPeeked(comp->trMemory());
                  exactAliases = addVeryRefinedCallAliasSets(resolvedMethodSymbol, aliases, &methodsPeeked);
                  symRefTab->aliasBuilder.setVeryRefinedCallAliasSets(resolvedMethodSymbol, exactAliases);
                  }
               if (exactAliases)
                  {
                  return exactAliases;
                  }
               }

            // From here on, we're just checking refined alias info.
            // If refined aliases are disabled, return the conservative answer
            // we would have returned had we never attempted to use refined
            // aliases at all.
            //
            if (comp->getOption(TR_DisableRefinedAliases))
               return symRefTab->aliasBuilder.methodAliases(self());

            if (!methodInfo->doesntKillAddressArrayShadows())
               {

               symRefTab->aliasBuilder.addAddressArrayShadows(aliases);

               if (comp->generateArraylets())
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Address));
               }

            if (!methodInfo->doesntKillIntArrayShadows())
               {

               symRefTab->aliasBuilder.addIntArrayShadows(aliases);

               if (comp->generateArraylets())
                  {
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Int32));
                  }
               }

            if (!methodInfo->doesntKillNonIntPrimitiveArrayShadows())
               {

               symRefTab->aliasBuilder.addNonIntPrimitiveArrayShadows(aliases);

               if (comp->generateArraylets())
                  {
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Int8));
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Int16));
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Int32));
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Int64));
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Float));
                  aliases->set(symRefTab->getArrayletShadowIndex(TR::Double));
                  }
               }

            if (!methodInfo->doesntKillAddressFields())
               *aliases |= symRefTab->aliasBuilder.addressShadowSymRefs();

            if (!methodInfo->doesntKillIntFields())
               *aliases |= symRefTab->aliasBuilder.intShadowSymRefs();

            if (!methodInfo->doesntKillNonIntPrimitiveFields())
               *aliases |= symRefTab->aliasBuilder.nonIntPrimitiveShadowSymRefs();

            if (!methodInfo->doesntKillAddressStatics())
               *aliases |= symRefTab->aliasBuilder.addressStaticSymRefs();

            if (!methodInfo->doesntKillIntStatics())
               *aliases |= symRefTab->aliasBuilder.intStaticSymRefs();

            if (!methodInfo->doesntKillNonIntPrimitiveStatics())
               *aliases |= symRefTab->aliasBuilder.nonIntPrimitiveStaticSymRefs();

            TR_BitVector *methodAliases = symRefTab->aliasBuilder.methodAliases(self());
            *aliases &= *methodAliases;
            return aliases;
            }
#endif

         return symRefTab->aliasBuilder.methodAliases(self());
         }
      case TR::Symbol::IsShadow:
         {
         if ((self()->isUnresolved() && !_symbol->isConstObjectRef()) || _symbol->isVolatile() || self()->isLiteralPoolAddress() || self()->isFromLiteralPool() ||
             (_symbol->isUnsafeShadowSymbol() && !self()->reallySharesSymbol()))
            {
            if (symRefTab->aliasBuilder.unsafeArrayElementSymRefs().get(self()->getReferenceNumber()))
               {
               TR_BitVector *aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
               *aliases |= comp->getSymRefTab()->aliasBuilder.defaultMethodDefAliasesWithoutImmutable();
               *aliases -= symRefTab->aliasBuilder.cpSymRefs();
               return aliases;
               }
            else
               return &comp->getSymRefTab()->aliasBuilder.defaultMethodDefAliasesWithoutImmutable();
            }

         TR_BitVector *aliases = NULL;
         if (_symbol == symRefTab->findGenericIntShadowSymbol())
            {
            aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            *aliases |= symRefTab->aliasBuilder.arrayElementSymRefs();
            if (comp->generateArraylets())
               *aliases |= symRefTab->aliasBuilder.arrayletElementSymRefs();
            *aliases |= symRefTab->aliasBuilder.genericIntShadowSymRefs();
            *aliases |= symRefTab->aliasBuilder.genericIntArrayShadowSymRefs();
            *aliases |= symRefTab->aliasBuilder.genericIntNonArrayShadowSymRefs();
            *aliases |= symRefTab->aliasBuilder.unsafeSymRefNumbers();
#ifdef J9_PROJECT_SPECIFIC
            *aliases |= symRefTab->aliasBuilder.unresolvedShadowSymRefs();
#endif
            if (symRefTab->aliasBuilder.conservativeGenericIntShadowAliasing())
               {
               *aliases |= symRefTab->aliasBuilder.addressShadowSymRefs();
               *aliases |= symRefTab->aliasBuilder.intShadowSymRefs();
               *aliases |= symRefTab->aliasBuilder.nonIntPrimitiveShadowSymRefs();
               }
            aliases->set(self()->getReferenceNumber());
            return aliases;
            }

         if (self()->reallySharesSymbol(comp))
            {
            aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            self()->setSharedShadowAliases(aliases, symRefTab);
            }

         if (symRefTab->findGenericIntShadowSymbol())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            self()->setLiteralPoolAliases(aliases, symRefTab);

            if (symRefTab->aliasBuilder.conservativeGenericIntShadowAliasing() || self()->isUnresolved())
               {
               *aliases |= symRefTab->aliasBuilder.genericIntShadowSymRefs();
               *aliases |= symRefTab->aliasBuilder.genericIntArrayShadowSymRefs();
               *aliases |= symRefTab->aliasBuilder.genericIntNonArrayShadowSymRefs();
               }
            }

         if (_symbol->isArrayShadowSymbol() &&
             symRefTab->findGenericIntShadowSymbol())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            *aliases |= symRefTab->aliasBuilder.genericIntShadowSymRefs();
            *aliases |= symRefTab->aliasBuilder.genericIntArrayShadowSymRefs();

            if (supportArrayRefinement && self()->getIndependentSymRefs())
               *aliases -= *self()->getIndependentSymRefs();
            }

#ifdef J9_PROJECT_SPECIFIC
         // make TR::PackedDecimal aliased with TR::Int8(byte)
         if (_symbol->isArrayShadowSymbol() && _symbol->getDataType() == TR::PackedDecimal)
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            aliases->set(symRefTab->getArrayShadowIndex(TR::Int8));
            }
         //the other way around.
         if (_symbol->isArrayShadowSymbol() && _symbol->getDataType() == TR::Int8)
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            aliases->set(symRefTab->getArrayShadowIndex(TR::PackedDecimal));
            }
#endif

         // alias vector arrays shadows  with corresponding scalar array shadows
         if (_symbol->isArrayShadowSymbol() && _symbol->getDataType().isVector())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            aliases->set(symRefTab->getArrayShadowIndex(_symbol->getDataType().vectorToScalar()));
            }
         // the other way around
         if (_symbol->isArrayShadowSymbol() && !_symbol->getDataType().isVector())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            aliases->set(symRefTab->getArrayShadowIndex(_symbol->getDataType().scalarToVector()));
            }

         if (_symbol->isArrayShadowSymbol() &&
             !symRefTab->aliasBuilder.immutableArrayElementSymRefs().isEmpty())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);

            TR::DataType type = _symbol->getDataType();
            TR_BitVectorIterator bvi(symRefTab->aliasBuilder.arrayElementSymRefs());
            int32_t symRefNum;
            while (bvi.hasMoreElements())
               {
               symRefNum = bvi.getNextElement();
               if (symRefTab->getSymRef(symRefNum)->getSymbol()->getDataType() == type)
                  aliases->set(symRefNum);
               }
            }

         if (_symbol->isArrayShadowSymbol() &&
             supportArrayRefinement &&
             comp->getMethodSymbol()->hasVeryRefinedAliasSets())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);

            TR::DataType type = _symbol->getDataType();
            TR_BitVectorIterator bvi(symRefTab->aliasBuilder.arrayElementSymRefs());
            int32_t symRefNum;
            while (bvi.hasMoreElements())
               {
               symRefNum = bvi.getNextElement();
               if (symRefTab->getSymRef(symRefNum)->getSymbol()->getDataType() == type)
                  aliases->set(symRefNum);
               }

            if (self()->getIndependentSymRefs())
               *aliases -= *self()->getIndependentSymRefs();

            return aliases;
            }

         if (aliases)
            aliases->set(self()->getReferenceNumber());

         if (symRefTab->aliasBuilder.unsafeArrayElementSymRefs().get(self()->getReferenceNumber()))
            *aliases -= symRefTab->aliasBuilder.cpSymRefs();
         else if (symRefTab->aliasBuilder.cpSymRefs().get(self()->getReferenceNumber()))
            *aliases -= symRefTab->aliasBuilder.unsafeArrayElementSymRefs();

         return aliases;
         }
      case TR::Symbol::IsStatic:
         {
         // For unresolved constant dynamic, we need to invoke a Java bootstrap method,
         // which can have arbitrary side effects, so the aliasing should be conservative here.
         // isConstObjectRef now returns true for condy, so we add an explicit condition,
         // more like a short-circuit, to say if we are unresolved and not isConstObjectRef
         // (this is the same as before), or if we are unresolved and condy
         // (this is the extra condition added), we would return conservative aliases.
         if ((self()->isUnresolved() && (_symbol->isConstantDynamic() || !_symbol->isConstObjectRef())) ||
	     self()->isLiteralPoolAddress() || self()->isFromLiteralPool() || _symbol->isVolatile())
            {
            return &comp->getSymRefTab()->aliasBuilder.defaultMethodDefAliases();
            }

         TR_BitVector *aliases = NULL;
         if (self()->reallySharesSymbol(comp))
            {
            aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            self()->setSharedStaticAliases(aliases, symRefTab);
            }

         if (symRefTab->findGenericIntShadowSymbol())
            {
            if (!aliases)
               aliases = new (aliasRegion) TR_BitVector(bvInitialSize, aliasRegion, growability);
            self()->setLiteralPoolAliases(aliases, symRefTab);
            }

         if (aliases)
            aliases->set(self()->getReferenceNumber());

         return aliases;
         }
      case TR::Symbol::IsMethodMetaData:
         {
         TR_BitVector *aliases = NULL;
         return aliases;
         }
      default:
         //TR_ASSERT(0, "getUseDefAliasing called for non method");
         if (comp->generateArraylets() && comp->getSymRefTab()->aliasBuilder.gcSafePointSymRefNumbers().get(self()->getReferenceNumber()) && includeGCSafePoint)
            return &comp->getSymRefTab()->aliasBuilder.gcSafePointSymRefNumbers();
         else
            return 0;


      }
   }
Beispiel #9
0
void
TR_Debug::print(TR::FILE *pOutFile, TR::S390CallSnippet * snippet)
   {
   uint8_t * bufferPos = snippet->getSnippetLabel()->getCodeLocation();
   TR::Node * callNode = snippet->getNode();
   TR::SymbolReference * methodSymRef = snippet->getRealMethodSymbolReference();
   if(!methodSymRef)
      methodSymRef = callNode->getSymbolReference();

   TR::MethodSymbol * methodSymbol = methodSymRef->getSymbol()->castToMethodSymbol();
   TR::SymbolReference * glueRef;
   int8_t padbytes = snippet->getPadBytes();

   printSnippetLabel(pOutFile, snippet->getSnippetLabel(), bufferPos,
      methodSymRef->isUnresolved() ? "Unresolved Call Snippet" : "Call Snippet");

   bufferPos = printS390ArgumentsFlush(pOutFile, callNode, bufferPos, snippet->getSizeOfArguments());

   if (methodSymRef->isUnresolved() || _comp->compileRelocatableCode())
      {
      if (methodSymbol->isSpecial())
         {
         glueRef = _cg->getSymRef(TR_S390interpreterUnresolvedSpecialGlue);
         }
      else if (methodSymbol->isStatic())
         {
         glueRef = _cg->getSymRef(TR_S390interpreterUnresolvedStaticGlue);
         }
      else
         {
         glueRef = _cg->getSymRef(TR_S390interpreterUnresolvedDirectVirtualGlue);
         }
      }
   else
      {
      bool synchronised = methodSymbol->isSynchronised();

      if ((methodSymbol->isVMInternalNative() || methodSymbol->isJITInternalNative()))
         {
         glueRef = _cg->getSymRef(TR_S390nativeStaticHelper);
         }
      else
         {
         switch (callNode->getDataType())
            {
            case TR::NoType:
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncVoidStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterVoidStaticGlue);
                  }
               break;
            case TR::Int8:
            case TR::Int16:
            case TR::Int32:
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncIntStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterIntStaticGlue);

                  }
               break;
            case TR::Address:
            if (TR::Compiler->target.is64Bit())
               {
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncLongStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterLongStaticGlue);
                  }
               }
            else
               {
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncIntStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterIntStaticGlue);
                  }
               }
               break;

            case TR::Int64:
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncLongStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterLongStaticGlue);
                  }
               break;

            case TR::Float:
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncFloatStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterFloatStaticGlue);
                  }
               break;

            case TR::Double:
               if (synchronised)
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterSyncDoubleStaticGlue);
                  }
               else
                  {
                  glueRef = _cg->getSymRef(TR_S390interpreterDoubleStaticGlue);
                  }
               break;

            default:
               TR_ASSERT(0, "Bad return data type for a call node.  DataType was %s\n",
                  getName(callNode->getDataType()));
            }
         }
      }
   bufferPos = printRuntimeInstrumentationOnOffInstruction(pOutFile, bufferPos, false); // RIOFF

   if (snippet->getKind() == TR::Snippet::IsUnresolvedCall)
      {
      int lengthOfLoad = (TR::Compiler->target.is64Bit())?6:4;

      printPrefix(pOutFile, NULL, bufferPos, 6);
      trfprintf(pOutFile, "LARL \tGPR14, *+%d <%p>\t# Start of Data Const.",
                        8 + lengthOfLoad + padbytes,
                        bufferPos + 8 + lengthOfLoad + padbytes);
      bufferPos += 6;
      if (TR::Compiler->target.is64Bit())
         {
         printPrefix(pOutFile, NULL, bufferPos, 6);
         trfprintf(pOutFile, "LG  \tGPR_EP, 0(,GPR14)");
         bufferPos += 6;
         }
      else
         {
         printPrefix(pOutFile, NULL, bufferPos, 4);
         trfprintf(pOutFile, "L   \tGPR_EP, 0(,GPR14)");
         bufferPos += 4;
         }
      printPrefix(pOutFile, NULL, bufferPos, 2);
      trfprintf(pOutFile, "BCR    \tGPR_EP");
      bufferPos += 2;
      }
   else
      {
      printPrefix(pOutFile, NULL, bufferPos, 6);
      trfprintf(pOutFile, "BRASL \tGPR14, <%p>\t# Branch to Helper Method %s",
                    snippet->getSnippetDestAddr(),
                    snippet->usedTrampoline()?"- Trampoline Used.":"");
      bufferPos += 6;
      }

   if (padbytes == 2)
      {
      printPrefix(pOutFile, NULL, bufferPos, 2);
      trfprintf(pOutFile, "DC   \t0x0000 \t\t\t# 2-bytes padding for alignment");
      bufferPos += 2;
      }
   else if (padbytes == 4)
      {
      printPrefix(pOutFile, NULL, bufferPos, 4) ;
      trfprintf(pOutFile, "DC   \t0x00000000 \t\t# 4-bytes padding for alignment");
      bufferPos += 4;
      }
   else if (padbytes == 6)
      {
      printPrefix(pOutFile, NULL, bufferPos, 6) ;
      trfprintf(pOutFile, "DC   \t0x000000000000 \t\t# 6-bytes padding for alignment");
      bufferPos += 6;
      }

   printPrefix(pOutFile, NULL, bufferPos, sizeof(intptrj_t));
   trfprintf(pOutFile, "DC   \t%p \t\t# Method Address", glueRef->getMethodAddress());
   bufferPos += sizeof(intptrj_t);


   printPrefix(pOutFile, NULL, bufferPos, sizeof(intptrj_t));
   trfprintf(pOutFile, "DC   \t%p \t\t# Call Site RA", snippet->getCallRA());
   bufferPos += sizeof(intptrj_t);

   if (methodSymRef->isUnresolved())
      {
      printPrefix(pOutFile, NULL, bufferPos, 0);
      }
   else
      {
      printPrefix(pOutFile, NULL, bufferPos, sizeof(intptrj_t));
      }

   trfprintf(pOutFile, "DC   \t%p \t\t# Method Pointer", methodSymRef->isUnresolved() ? 0 : methodSymbol->getMethodAddress());
   }
Beispiel #10
0
TR::Register *TR::AMD64SystemLinkage::buildDirectDispatch(
      TR::Node *callNode,
      bool spillFPRegs)
   {
   TR::SymbolReference *methodSymRef = callNode->getSymbolReference();
   TR::MethodSymbol *methodSymbol = methodSymRef->getSymbol()->castToMethodSymbol();

   TR::Register *returnReg;

   // Allocate adequate register dependencies.
   //
   // pre = number of argument registers
   // post = number of volatile + return register
   //
   uint32_t pre = getProperties().getNumIntegerArgumentRegisters() + getProperties().getNumFloatArgumentRegisters();
   uint32_t post = getProperties().getNumVolatileRegisters() + (callNode->getDataType() == TR::NoType ? 0 : 1);

   TR::RegisterDependencyConditions *preDeps = generateRegisterDependencyConditions(pre, 0, cg());
   TR::RegisterDependencyConditions *postDeps = generateRegisterDependencyConditions(0, post, cg());

   // Evaluate outgoing arguments on the system stack and build pre-conditions.
   //
   int32_t memoryArgSize = buildArgs(callNode, preDeps);

   // Build post-conditions.
   //
   returnReg = buildVolatileAndReturnDependencies(callNode, postDeps);
   postDeps->stopAddingPostConditions();

   // Find the second scratch register in the post dependency list.
   //
   TR::Register *scratchReg = NULL;
   TR::RealRegister::RegNum scratchRegIndex = getProperties().getIntegerScratchRegister(1);
   for (int32_t i=0; i<post; i++)
      {
      if (postDeps->getPostConditions()->getRegisterDependency(i)->getRealRegister() == scratchRegIndex)
         {
         scratchReg = postDeps->getPostConditions()->getRegisterDependency(i)->getRegister();
         break;
         }
      }

   TR::Instruction *instr;
   if (methodSymbol->getMethodAddress())
      {
      TR_ASSERT(scratchReg, "could not find second scratch register");
      auto LoadRegisterInstruction = generateRegImm64SymInstruction(
         MOV8RegImm64,
         callNode,
         scratchReg,
         (uintptr_t)methodSymbol->getMethodAddress(),
         methodSymRef,
         cg());

      if (comp()->getOption(TR_EmitRelocatableELFFile))
         {
         LoadRegisterInstruction->setReloKind(TR_NativeMethodAbsolute);
         }

      instr = generateRegInstruction(CALLReg, callNode, scratchReg, preDeps, cg());
      }
   else
      {
      instr = generateImmSymInstruction(CALLImm4, callNode, (uintptrj_t)methodSymbol->getMethodAddress(), methodSymRef, preDeps, cg());
      }

   cg()->resetIsLeafMethod();

   instr->setNeedsGCMap(getProperties().getPreservedRegisterMapForGC());

   cg()->stopUsingRegister(scratchReg);

   TR::LabelSymbol *postDepLabel = generateLabelSymbol(cg());
   generateLabelInstruction(LABEL, callNode, postDepLabel, postDeps, cg());

   return returnReg;
   }