+2014-04-14 Richard Biener <rguenther@suse.de>
+
+ * tree-switch-conversion.c (lshift_cheap_p): Get speed_p
+ as argument.
+ (expand_switch_using_bit_tests_p): Likewise.
+ (process_switch): Compute and pass on speed_p based on the
+ switch stmt.
+ * tree-ssa-math-opts.c (gimple_expand_builtin_pow): Use
+ optimize_bb_for_speed_p.
+
2014-04-14 Eric Botcazou <ebotcazou@adacore.com>
* cfgloop.h (struct loop): Rename force_vect into force_vectorize.
if (c_is_int
&& ((n >= -1 && n <= 2)
|| (flag_unsafe_math_optimizations
- && optimize_insn_for_speed_p ()
+ && optimize_bb_for_speed_p (gsi_bb (*gsi))
&& powi_cost (n) <= POWI_MAX_MULTS)))
return gimple_expand_builtin_powi (gsi, loc, arg0, n);
This function (and similar RTL-related cost code in e.g. IVOPTS) should
be moved to some kind of interface file for GIMPLE/RTL interactions. */
static bool
-lshift_cheap_p (void)
+lshift_cheap_p (bool speed_p)
{
/* FIXME: This should be made target dependent via this "this_target"
mechanism, similar to e.g. can_copy_init_p in gcse.c. */
static bool init[2] = {false, false};
static bool cheap[2] = {true, true};
- bool speed_p;
/* If the targer has no lshift in word_mode, the operation will most
probably not be cheap. ??? Does GCC even work for such targets? */
if (optab_handler (ashl_optab, word_mode) == CODE_FOR_nothing)
return false;
- speed_p = optimize_insn_for_speed_p ();
-
if (!init[speed_p])
{
rtx reg = gen_raw_REG (word_mode, 10000);
static bool
expand_switch_using_bit_tests_p (tree range,
unsigned int uniq,
- unsigned int count)
+ unsigned int count, bool speed_p)
{
return (((uniq == 1 && count >= 3)
|| (uniq == 2 && count >= 5)
|| (uniq == 3 && count >= 6))
- && lshift_cheap_p ()
+ && lshift_cheap_p (speed_p)
&& compare_tree_int (range, GET_MODE_BITSIZE (word_mode)) < 0
&& compare_tree_int (range, 0) > 0);
}
if (info.uniq <= MAX_CASE_BIT_TESTS)
{
if (expand_switch_using_bit_tests_p (info.range_size,
- info.uniq, info.count))
+ info.uniq, info.count,
+ optimize_bb_for_speed_p
+ (gimple_bb (swtch))))
{
if (dump_file)
fputs (" expanding as bit test is preferable\n", dump_file);