From 0aea6467d5022e3858bfed5ce5d24aa877bfed1a Mon Sep 17 00:00:00 2001 From: Zdenek Dvorak Date: Wed, 19 May 2004 19:53:45 +0200 Subject: Multiple fixes: PRs 14692, 15274 and 15463 PR c++/15463 * loop-iv.c (iv_number_of_iterations): Use trunc_int_for_mode on result of inverse. PR rtl-optimization/15274 * loop-iv.c (determine_max_iter, shorten_into_mode, iv_number_of_iterations): Handle constants correctly. * rtl.h (get_mode_bounds): Declaration changed. * stor-layout.c (get_mode_bounds): Return a constant suitable for the target mode. PR rtl-optimization/14692 * loop-unswitch.c (may_unswitch_on): Try folding the result. (unswitch_single_loop): Work correctly when may_unswitch_on returns a folded constant. * loop-iv.c (implies_p): Handle A < B ==> A + 1 <= B. * simplify-rtx.c (simplify_const_relational_operation): Optimize comparisons with mode bounds. * function.c (struct temp_slot): Add new field prev. (free_after_compilation, init_temp_slots): Free new fields. (cut_slot_from_list, insert_slot_to_list, temp_slots_at_level, max_slot_level, move_slot_to_level, make_slot_available): New functions. (assign_stack_temp_for_type, combine_temp_slots, find_temp_slot_from_address, preserve_temp_slots, preserve_rtl_expr_result, free_temp_slots, free_temps_for_rtl_expr, pop_temp_slots): Work with the new structure of lists. (mark_all_temps_used): Removed. * function.h (struct function): Field x_temp_slots replaced by x_used_temp_slots and x_avail_temp_slots. (temp_slots): Replaced by ... (used_temp_slots, avail_temp_slots): New. * tree.h (mark_all_temps_used): Declaration removed. * loop-iv.c (mark_single_set, get_biv_step_1, iv_analyze, simplify_using_assignment): Take the expression out of the expr_list wrapper. * loop-iv.c (iv_number_of_iterations): Improve clasification of infinite loops. From-SVN: r82028 --- gcc/stor-layout.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) (limited to 'gcc/stor-layout.c') diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 5c87a63..e1137f5 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -2160,26 +2160,32 @@ get_best_mode (int bitsize, int bitpos, unsigned int align, } /* Gets minimal and maximal values for MODE (signed or unsigned depending on - SIGN). */ + SIGN). The returned constants are made to be usable in TARGET_MODE. */ void -get_mode_bounds (enum machine_mode mode, int sign, rtx *mmin, rtx *mmax) +get_mode_bounds (enum machine_mode mode, int sign, + enum machine_mode target_mode, + rtx *mmin, rtx *mmax) { - int size = GET_MODE_BITSIZE (mode); + unsigned size = GET_MODE_BITSIZE (mode); + unsigned HOST_WIDE_INT min_val, max_val; if (size > HOST_BITS_PER_WIDE_INT) abort (); if (sign) { - *mmin = GEN_INT (-((unsigned HOST_WIDE_INT) 1 << (size - 1))); - *mmax = GEN_INT (((unsigned HOST_WIDE_INT) 1 << (size - 1)) - 1); + min_val = -((unsigned HOST_WIDE_INT) 1 << (size - 1)); + max_val = ((unsigned HOST_WIDE_INT) 1 << (size - 1)) - 1; } else { - *mmin = const0_rtx; - *mmax = GEN_INT (((unsigned HOST_WIDE_INT) 1 << (size - 1) << 1) - 1); + min_val = 0; + max_val = ((unsigned HOST_WIDE_INT) 1 << (size - 1) << 1) - 1; } + + *mmin = GEN_INT (trunc_int_for_mode (min_val, target_mode)); + *mmax = GEN_INT (trunc_int_for_mode (max_val, target_mode)); } #include "gt-stor-layout.h" -- cgit v1.1