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loop.h (LOOP_AUTO_UNROLL): Rename from LOOP_FIRST_PASS. 

* loop.h (LOOP_AUTO_UNROLL): Rename from LOOP_FIRST_PASS.
        * loop.c (strength_reduce): Update.
        * toplev.c (rest_of_compilation): Do unrolling in the first
        loop pass, not the second.

From-SVN: r55634
This commit is contained in:
Richard Henderson 2002-07-21 17:26:03 -07:00 committed by Richard Henderson
parent c67a1cf6a8
commit 5e1afb115e
4 changed files with 16 additions and 7 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2002-07-21 Richard Henderson <rth@redhat.com>
* loop.h (LOOP_AUTO_UNROLL): Rename from LOOP_FIRST_PASS.
* loop.c (strength_reduce): Update.
* toplev.c (rest_of_compilation): Do unrolling in the first
loop pass, not the second.
2002-07-21 Richard Henderson <rth@redhat.com>
* emit-rtl.c (set_mem_attributes): Preserve indirection of PARM_DECL

2
gcc/loop.c
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@ -5320,7 +5320,7 @@ strength_reduce (loop, flags)
collected. Always unroll loops that would be as small or smaller
unrolled than when rolled. */
if ((flags & LOOP_UNROLL)
|| (!(flags & LOOP_FIRST_PASS)
|| ((flags & LOOP_AUTO_UNROLL)
&& loop_info->n_iterations > 0
&& unrolled_insn_copies <= insn_count))
unroll_loop (loop, insn_count, 1);

2
gcc/loop.h
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@ -28,7 +28,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#define LOOP_UNROLL 1
#define LOOP_BCT 2
#define LOOP_PREFETCH 4
#define LOOP_FIRST_PASS 8
#define LOOP_AUTO_UNROLL 8
/* Get the loop info pointer of a loop. */
#define LOOP_INFO(LOOP) ((struct loop_info *) (LOOP)->aux)

12
gcc/toplev.c
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@ -1,4 +1,3 @@
/* Top level of GNU C compiler
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002 Free Software Foundation, Inc.
@ -2878,6 +2877,8 @@ rest_of_compilation (decl)
if (optimize > 0 && flag_loop_optimize)
{
int do_unroll, do_prefetch;
timevar_push (TV_LOOP);
delete_dead_jumptables ();
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
@ -2885,12 +2886,15 @@ rest_of_compilation (decl)
/* CFG is no longer maintained up-to-date. */
free_bb_for_insn ();
do_unroll = flag_unroll_loops ? LOOP_UNROLL : LOOP_AUTO_UNROLL;
do_prefetch = flag_prefetch_loop_arrays ? LOOP_PREFETCH : 0;
if (flag_rerun_loop_opt)
{
cleanup_barriers ();
/* We only want to perform unrolling once. */
loop_optimize (insns, rtl_dump_file, LOOP_FIRST_PASS);
loop_optimize (insns, rtl_dump_file, do_unroll);
do_unroll = 0;
/* The first call to loop_optimize makes some instructions
trivially dead. We delete those instructions now in the
@ -2903,9 +2907,7 @@ rest_of_compilation (decl)
reg_scan (insns, max_reg_num (), 1);
}
cleanup_barriers ();
loop_optimize (insns, rtl_dump_file,
(flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT
| (flag_prefetch_loop_arrays ? LOOP_PREFETCH : 0));
loop_optimize (insns, rtl_dump_file, do_unroll | LOOP_BCT | do_prefetch);
/* Loop can create trivially dead instructions. */
delete_trivially_dead_insns (insns, max_reg_num ());