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| author | Tom Wood <wood@gnu.org> | 1992-10-13 18:45:45 +0000 |
|---|---|---|
| committer | Tom Wood <wood@gnu.org> | 1992-10-13 18:45:45 +0000 |
| commit | 1c01e9df92a901c69981316978aab8a8124705ff (patch) | |
| tree | 3e9962eea5cd46a4da629d222756d0e544c9d1dd /gcc/loop.c | |
| parent | 2988e8a39e50f3acb58b82c8bca8f06b5d2562a9 (diff) | |
| download | gcc-1c01e9df92a901c69981316978aab8a8124705ff.zip gcc-1c01e9df92a901c69981316978aab8a8124705ff.tar.gz gcc-1c01e9df92a901c69981316978aab8a8124705ff.tar.bz2 | |
(loop_optimize): Verify that max_uid_for_loop is still larger than the uid of any insn.
(loop_optimize): Verify that max_uid_for_loop is still
larger than the uid of any insn. Increase the number of exit
blocks from 4 to 32 per loop.
(find_and_verify_loops): Stop trying to relocate exit blocks when
allocating a new label would exceed max_uid_for_loop.
From-SVN: r2440
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 12 |
1 files changed, 8 insertions, 4 deletions
@@ -361,7 +361,7 @@ loop_optimize (f, dumpfile) /* Get size to use for tables indexed by uids. Leave some space for labels allocated by find_and_verify_loops. */ - max_uid_for_loop = get_max_uid () + 1 + max_loop_num * 4; + max_uid_for_loop = get_max_uid () + 1 + max_loop_num * 32; uid_luid = (int *) alloca (max_uid_for_loop * sizeof (int)); uid_loop_num = (int *) alloca (max_uid_for_loop * sizeof (int)); @@ -386,6 +386,10 @@ loop_optimize (f, dumpfile) function. */ reg_scan (f, max_reg_num (), 1); + /* See if we went too far. */ + if (get_max_uid () > max_uid_for_loop) + abort (); + /* Compute the mapping from uids to luids. LUIDs are numbers assigned to insns, like uids, except that luids increase monotonically through the code. @@ -2240,7 +2244,8 @@ find_and_verify_loops (f) && (GET_CODE (PATTERN (insn)) == RETURN || (simplejump_p (insn) && (uid_loop_num[INSN_UID (JUMP_LABEL (insn))] - != this_loop_num)))) + != this_loop_num))) + && get_max_uid () < max_uid_for_loop) { rtx p; rtx our_next = next_real_insn (insn); @@ -2299,8 +2304,7 @@ find_and_verify_loops (f) /* Verify that uid_loop_num is large enough and that we can invert P. */ - if (INSN_UID (new_label) < max_uid_for_loop - && invert_jump (p, new_label)) + if (invert_jump (p, new_label)) { rtx q, r; |