示例#1
0
//------------------------------sched_call-------------------------------------
uint Block::sched_call( Matcher &m, Block_Array &bbs, uint node_cnt, Node_List &worklist, int *ready_cnt, MachCallNode *mcall, VectorSet &next_call ) {
  RegMask regs;

  // Schedule all the users of the call right now.  All the users are
  // projection Nodes, so they must be scheduled next to the call.
  // Collect all the defined registers.
  for (DUIterator_Fast imax, i = mcall->fast_outs(imax); i < imax; i++) {
    Node* n = mcall->fast_out(i);
    assert( n->Opcode()==Op_MachProj, "" );
    --ready_cnt[n->_idx];
    assert( !ready_cnt[n->_idx], "" );
    // Schedule next to call
    _nodes.map(node_cnt++, n);
    // Collect defined registers
    regs.OR(n->out_RegMask());
    // Check for scheduling the next control-definer
    if( n->bottom_type() == Type::CONTROL ) 
      // Warm up next pile of heuristic bits
      needed_for_next_call(n, next_call, bbs);

    // Children of projections are now all ready
    for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) {
      Node* m = n->fast_out(j); // Get user
      if( bbs[m->_idx] != this ) continue;
      if( m->is_Phi() ) continue;
      if( !--ready_cnt[m->_idx] ) 
        worklist.push(m);
    }
  
  }

  // Act as if the call defines the Frame Pointer.
  // Certainly the FP is alive and well after the call.
  regs.Insert(m.c_frame_pointer());

  // Set all registers killed and not already defined by the call.
  uint r_cnt = mcall->tf()->range()->cnt();
  int op = mcall->ideal_Opcode();
  MachProjNode *proj = new (1) MachProjNode( mcall, r_cnt+1, RegMask::Empty, MachProjNode::fat_proj );
  bbs.map(proj->_idx,this);
  _nodes.insert(node_cnt++, proj);

  for( OptoReg::Name r = OptoReg::Name(0); r < _last_Mach_Reg; r=OptoReg::add(r,1) ) {
    if( !regs.Member(r) ) {     // Not already defined by the call  
      // Save-on-call register?
      if( (m._register_save_policy[r] == 'C') ||
          (m._register_save_policy[r] == 'A') ||
          ((m._register_save_policy[r] == 'E') &&
           (op == Op_CallRuntime     ||
            op == Op_CallNative      ||
            op == Op_CallInterpreter ||
            op == Op_CallLeaf)) ) { 
        proj->_rout.Insert(r);
      }
    }
  }

  return node_cnt;
}
示例#2
0
文件: lcm.cpp 项目: dain/graal
//------------------------------add_call_kills-------------------------------------
// helper function that adds caller save registers to MachProjNode
static void add_call_kills(MachProjNode *proj, RegMask& regs, const char* save_policy, bool exclude_soe) {
  // Fill in the kill mask for the call
  for( OptoReg::Name r = OptoReg::Name(0); r < _last_Mach_Reg; r=OptoReg::add(r,1) ) {
    if( !regs.Member(r) ) {     // Not already defined by the call
      // Save-on-call register?
      if ((save_policy[r] == 'C') ||
          (save_policy[r] == 'A') ||
          ((save_policy[r] == 'E') && exclude_soe)) {
        proj->_rout.Insert(r);
      }
    }
  }
}
示例#3
0
//------------------------------sched_call-------------------------------------
uint Block::sched_call( Matcher &matcher, Block_Array &bbs, uint node_cnt, Node_List &worklist, int *ready_cnt, MachCallNode *mcall, VectorSet &next_call ) {
  RegMask regs;

  // Schedule all the users of the call right now.  All the users are
  // projection Nodes, so they must be scheduled next to the call.
  // Collect all the defined registers.
  for (DUIterator_Fast imax, i = mcall->fast_outs(imax); i < imax; i++) {
    Node* n = mcall->fast_out(i);
    assert( n->Opcode()==Op_MachProj, "" );
    --ready_cnt[n->_idx];
    assert( !ready_cnt[n->_idx], "" );
    // Schedule next to call
    _nodes.map(node_cnt++, n);
    // Collect defined registers
    regs.OR(n->out_RegMask());
    // Check for scheduling the next control-definer
    if( n->bottom_type() == Type::CONTROL )
      // Warm up next pile of heuristic bits
      needed_for_next_call(n, next_call, bbs);

    // Children of projections are now all ready
    for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) {
      Node* m = n->fast_out(j); // Get user
      if( bbs[m->_idx] != this ) continue;
      if( m->is_Phi() ) continue;
      if( !--ready_cnt[m->_idx] )
        worklist.push(m);
    }

  }

  // Act as if the call defines the Frame Pointer.
  // Certainly the FP is alive and well after the call.
  regs.Insert(matcher.c_frame_pointer());

  // Set all registers killed and not already defined by the call.
  uint r_cnt = mcall->tf()->range()->cnt();
  int op = mcall->ideal_Opcode();
  MachProjNode *proj = new (matcher.C, 1) MachProjNode( mcall, r_cnt+1, RegMask::Empty, MachProjNode::fat_proj );
  bbs.map(proj->_idx,this);
  _nodes.insert(node_cnt++, proj);

  // Select the right register save policy.
  const char * save_policy;
  switch (op) {
    case Op_CallRuntime:
    case Op_CallLeaf:
    case Op_CallLeafNoFP:
      // Calling C code so use C calling convention
      save_policy = matcher._c_reg_save_policy;
      break;

    case Op_CallStaticJava:
    case Op_CallDynamicJava:
      // Calling Java code so use Java calling convention
      save_policy = matcher._register_save_policy;
      break;

    default:
      ShouldNotReachHere();
  }

  // When using CallRuntime mark SOE registers as killed by the call
  // so values that could show up in the RegisterMap aren't live in a
  // callee saved register since the register wouldn't know where to
  // find them.  CallLeaf and CallLeafNoFP are ok because they can't
  // have debug info on them.  Strictly speaking this only needs to be
  // done for oops since idealreg2debugmask takes care of debug info
  // references but there no way to handle oops differently than other
  // pointers as far as the kill mask goes.
  bool exclude_soe = op == Op_CallRuntime;

  // If the call is a MethodHandle invoke, we need to exclude the
  // register which is used to save the SP value over MH invokes from
  // the mask.  Otherwise this register could be used for
  // deoptimization information.
  if (op == Op_CallStaticJava) {
    MachCallStaticJavaNode* mcallstaticjava = (MachCallStaticJavaNode*) mcall;
    if (mcallstaticjava->_method_handle_invoke)
      proj->_rout.OR(Matcher::method_handle_invoke_SP_save_mask());
  }

  // Fill in the kill mask for the call
  for( OptoReg::Name r = OptoReg::Name(0); r < _last_Mach_Reg; r=OptoReg::add(r,1) ) {
    if( !regs.Member(r) ) {     // Not already defined by the call
      // Save-on-call register?
      if ((save_policy[r] == 'C') ||
          (save_policy[r] == 'A') ||
          ((save_policy[r] == 'E') && exclude_soe)) {
        proj->_rout.Insert(r);
      }
    }
  }

  return node_cnt;
}