From ae1669a98656cca594fcd2fef6bd2cd7308a361f Mon Sep 17 00:00:00 2001 From: Andrew MacLeod Date: Tue, 20 Sep 2022 18:12:25 -0400 Subject: 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. --- gcc/gimple-range-fold.cc | 61 ------------------------------------------------ 1 file changed, 61 deletions(-) (limited to 'gcc/gimple-range-fold.cc') 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. -- cgit v1.1