diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 143dcad..cd7f1d9 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -13388,14 +13388,29 @@ fold_strip_sign_ops (tree exp) break; case CALL_EXPR: - /* Strip sign ops from the argument of "odd" math functions. */ - if (negate_mathfn_p (builtin_mathfn_code (exp))) - { - arg0 = fold_strip_sign_ops (TREE_VALUE (TREE_OPERAND (exp, 1))); - if (arg0) - return build_function_call_expr (get_callee_fndecl (exp), - build_tree_list (NULL_TREE, arg0)); + { + const enum built_in_function fcode = builtin_mathfn_code (exp); + switch (fcode) + { + CASE_FLT_FN (BUILT_IN_COPYSIGN): + /* Strip copysign function call, return the 1st argument. */ + arg0 = TREE_VALUE (TREE_OPERAND (exp, 1)); + arg1 = TREE_VALUE (TREE_CHAIN (TREE_OPERAND (exp, 1))); + return omit_one_operand (TREE_TYPE (exp), arg0, arg1); + + default: + /* Strip sign ops from the argument of "odd" math functions. */ + if (negate_mathfn_p (fcode)) + { + arg0 = fold_strip_sign_ops (TREE_VALUE (TREE_OPERAND (exp, 1))); + if (arg0) + return build_function_call_expr (get_callee_fndecl (exp), + build_tree_list (NULL_TREE, + arg0)); + } + break; } + } break; default: |