diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/gimple-range-op.cc | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/gimple-range-op.cc b/gcc/gimple-range-op.cc index 527893f..2662319 100644 --- a/gcc/gimple-range-op.cc +++ b/gcc/gimple-range-op.cc @@ -342,6 +342,38 @@ public: } } op_cfn_signbit; +// Implement range operator for CFN_BUILT_IN_COPYSIGN +class cfn_copysign : public range_operator_float +{ +public: + using range_operator_float::fold_range; + virtual bool fold_range (frange &r, tree type, const frange &lh, + const frange &rh, relation_kind) const override + { + frange neg; + range_op_handler abs_op (ABS_EXPR, type); + range_op_handler neg_op (NEGATE_EXPR, type); + if (!abs_op || !abs_op.fold_range (r, type, lh, frange (type))) + return false; + if (!neg_op || !neg_op.fold_range (neg, type, r, frange (type))) + return false; + + bool signbit; + if (rh.signbit_p (signbit)) + { + // If the sign is negative, flip the result from ABS, + // otherwise leave things positive. + if (signbit) + r = neg; + } + else + // If the sign is unknown, keep the positive and negative + // alternatives. + r.union_ (neg); + return true; + } +} op_cfn_copysign; + // Implement range operator for CFN_BUILT_IN_TOUPPER and CFN_BUILT_IN_TOLOWER. class cfn_toupper_tolower : public range_operator { @@ -762,6 +794,13 @@ gimple_range_op_handler::maybe_builtin_call () m_valid = true; break; + CASE_CFN_COPYSIGN_ALL: + m_op1 = gimple_call_arg (call, 0); + m_op2 = gimple_call_arg (call, 1); + m_float = &op_cfn_copysign; + m_valid = true; + break; + case CFN_BUILT_IN_TOUPPER: case CFN_BUILT_IN_TOLOWER: // Only proceed If the argument is compatible with the LHS. |