diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 417d1a4..e8c36f0 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -6389,23 +6389,24 @@ fold (tree expr) enum built_in_function fcode0 = builtin_mathfn_code (arg0); enum built_in_function fcode1 = builtin_mathfn_code (arg1); - /* Optimizations of sqrt(...)*sqrt(...). */ - if (fcode0 == fcode1 && BUILTIN_SQRT_P (fcode0)) + /* Optimizations of root(...)*root(...). */ + if (fcode0 == fcode1 && BUILTIN_ROOT_P (fcode0)) { - tree sqrtfn, arg, arglist; + tree rootfn, arg, arglist; tree arg00 = TREE_VALUE (TREE_OPERAND (arg0, 1)); tree arg10 = TREE_VALUE (TREE_OPERAND (arg1, 1)); /* Optimize sqrt(x)*sqrt(x) as x. */ - if (operand_equal_p (arg00, arg10, 0) + if (BUILTIN_SQRT_P (fcode0) + && operand_equal_p (arg00, arg10, 0) && ! HONOR_SNANS (TYPE_MODE (type))) return arg00; - /* Optimize sqrt(x)*sqrt(y) as sqrt(x*y). */ - sqrtfn = TREE_OPERAND (TREE_OPERAND (arg0, 0), 0); + /* Optimize root(x)*root(y) as root(x*y). */ + rootfn = TREE_OPERAND (TREE_OPERAND (arg0, 0), 0); arg = fold (build (MULT_EXPR, type, arg00, arg10)); arglist = build_tree_list (NULL_TREE, arg); - return build_function_call_expr (sqrtfn, arglist); + return build_function_call_expr (rootfn, arglist); } /* Optimize expN(x)*expN(y) as expN(x+y). */ |