C++ (Cpp) strip_sign_op Examples

Example #1

File: gimple-ssa-backprop.c Project: chinabin/gcc-tiny

void
backprop::optimize_assign (gassign *assign, tree lhs, const usage_info *info)
{
  switch (gimple_assign_rhs_code (assign))
    {
    case MULT_EXPR:
    case RDIV_EXPR:
      /* If the sign of the result doesn't matter, strip sign operations
	 from both inputs.  */
      if (info->flags.ignore_sign)
	replace_assign_rhs (assign, lhs,
			    strip_sign_op (gimple_assign_rhs1 (assign)),
			    strip_sign_op (gimple_assign_rhs2 (assign)),
			    NULL_TREE);
      break;

    case COND_EXPR:
      /* If the sign of A ? B : C doesn't matter, strip sign operations
	 from both B and C.  */
      if (info->flags.ignore_sign)
	replace_assign_rhs (assign, lhs,
			    NULL_TREE,
			    strip_sign_op (gimple_assign_rhs2 (assign)),
			    strip_sign_op (gimple_assign_rhs3 (assign)));
      break;

    default:
      break;
    }
}

Example #2

File: gimple-ssa-backprop.c Project: MaxKellermann/gcc

void
backprop::optimize_phi (gphi *phi, tree var, const usage_info *info)
{
  /* If the sign of the result doesn't matter, try to strip sign operations
     from arguments.  */
  if (info->flags.ignore_sign)
    {
      basic_block bb = gimple_bb (phi);
      use_operand_p use;
      ssa_op_iter oi;
      bool replaced = false;
      FOR_EACH_PHI_ARG (use, phi, oi, SSA_OP_USE)
	{
	  /* Propagating along abnormal edges is delicate, punt for now.  */
	  const int index = PHI_ARG_INDEX_FROM_USE (use);
	  if (EDGE_PRED (bb, index)->flags & EDGE_ABNORMAL)
	    continue;

	  tree new_arg = strip_sign_op (USE_FROM_PTR (use));
	  if (new_arg)
	    {
	      if (!replaced)
		prepare_change (var);
	      if (dump_file && (dump_flags & TDF_DETAILS))
		note_replacement (phi, USE_FROM_PTR (use), new_arg);
	      replace_exp (use, new_arg);
	      replaced = true;
	    }
	}
    }

Example #3

File: gimple-ssa-backprop.c Project: chinabin/gcc-tiny

void
backprop::optimize_builtin_call (gcall *call, tree lhs, const usage_info *info)
{
  /* If we have an f such that -f(x) = f(-x), and if the sign of the result
     doesn't matter, strip any sign operations from the input.  */
  if (info->flags.ignore_sign
      && negate_mathfn_p (gimple_call_combined_fn (call)))
    {
      tree new_arg = strip_sign_op (gimple_call_arg (call, 0));
      if (new_arg)
	{
	  prepare_change (lhs);
	  gimple_call_set_arg (call, 0, new_arg);
	  complete_change (call);
	}
    }
}

Example #4

File: gimple-ssa-backprop.c Project: chinabin/gcc-tiny

void
backprop::optimize_phi (gphi *phi, tree var, const usage_info *info)
{
  /* If the sign of the result doesn't matter, strip sign operations
     from all arguments.  */
  if (info->flags.ignore_sign)
    {
      use_operand_p use;
      ssa_op_iter oi;
      bool replaced = false;
      FOR_EACH_PHI_ARG (use, phi, oi, SSA_OP_USE)
	{
	  tree new_arg = strip_sign_op (USE_FROM_PTR (use));
	  if (new_arg)
	    {
	      if (!replaced)
		prepare_change (var);
	      if (dump_file && (dump_flags & TDF_DETAILS))
		note_replacement (phi, USE_FROM_PTR (use), new_arg);
	      replace_exp (use, new_arg);
	      replaced = true;
	    }
	}