Convert CFN_CLZ builtins to range-ops.

	* gimple-range-fold.cc (range_of_builtin_int_call): Remove case
	for CFN_CLZ.
	* gimple-range-op.cc (class cfn_clz): New.
	(gimple_range_op_handler::maybe_builtin_call): Set arguments.

1 files changed, 0 insertions, 61 deletions

diff --git a/gcc/gimple-range-fold.cc b/gcc/gimple-range-fold.cc
index ca53103..63eaa90 100644
--- a/gcc/gimple-range-fold.cc
+++ b/gcc/gimple-range-fold.cc
@@ -926,67 +926,6 @@ fold_using_range::range_of_builtin_int_call (irange &r, gcall *call,
       r.set (build_zero_cst (type), build_one_cst (type));
       return true;
 
-    CASE_CFN_CLZ:
-      // __builtin_c[lt]z* return [0, prec-1], except when the
-      // argument is 0, but that is undefined behavior.
-      //
-      // For __builtin_c[lt]z* consider argument of 0 always undefined
-      // behavior, for internal fns depending on C?Z_DEFINED_VALUE_AT_ZERO.
-      arg = gimple_call_arg (call, 0);
-      prec = TYPE_PRECISION (TREE_TYPE (arg));
-      mini = 0;
-      maxi = prec - 1;
-      mode = SCALAR_INT_TYPE_MODE (TREE_TYPE (arg));
-      if (gimple_call_internal_p (call))
-	{
-	  if (optab_handler (clz_optab, mode) != CODE_FOR_nothing
-	      && CLZ_DEFINED_VALUE_AT_ZERO (mode, zerov) == 2)
-	    {
-	      // Only handle the single common value.
-	      if (zerov == prec)
-		maxi = prec;
-	      else
-		// Magic value to give up, unless we can prove arg is non-zero.
-		mini = -2;
-	    }
-	}
-
-      src.get_operand (r, arg);
-      // From clz of minimum we can compute result maximum.
-      if (!r.undefined_p ())
-	{
-	  // From clz of minimum we can compute result maximum.
-	  if (wi::gt_p (r.lower_bound (), 0, TYPE_SIGN (r.type ())))
-	    {
-	      maxi = prec - 1 - wi::floor_log2 (r.lower_bound ());
-	      if (mini == -2)
-		mini = 0;
-	    }
-	  else if (!range_includes_zero_p (&r))
-	    {
-	      mini = 0;
-	      maxi = prec - 1;
-	    }
-	  if (mini == -2)
-	    break;
-	  // From clz of maximum we can compute result minimum.
-	  wide_int max = r.upper_bound ();
-	  int newmini = prec - 1 - wi::floor_log2 (max);
-	  if (max == 0)
-	    {
-	      // If CLZ_DEFINED_VALUE_AT_ZERO is 2 with VALUE of prec,
-	      // return [prec, prec], otherwise ignore the range.
-	      if (maxi == prec)
-		mini = prec;
-	    }
-	  else
-	    mini = newmini;
-	}
-      if (mini == -2)
-	break;
-      r.set (build_int_cst (type, mini), build_int_cst (type, maxi));
-      return true;
-
     CASE_CFN_CTZ:
       // __builtin_ctz* return [0, prec-1], except for when the
       // argument is 0, but that is undefined behavior.