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(cse_basic_block): Fix test for whether block ends with a barrier. 

Return next insn, not 0, if block ends in a barrier.

From-SVN: r9916
This commit is contained in:
Richard Kenner 1995-06-09 18:05:54 -04:00
parent 138c94ea17
commit 146135d6db
1 changed files with 12 additions and 9 deletions
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21
gcc/cse.c
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@ -8429,22 +8429,25 @@ cse_basic_block (from, to, next_branch, around_loop)
&& GET_CODE (to) == CODE_LABEL && --LABEL_NUSES (to) == to_usage)
{
struct cse_basic_block_data val;
rtx prev;
insn = NEXT_INSN (to);
if (LABEL_NUSES (to) == 0)
delete_insn (to);
insn = delete_insn (to);
/* Find the end of the following block. Note that we won't be
following branches in this case. If TO was the last insn
in the function, we are done. Similarly, if we deleted the
insn after TO, it must have been because it was preceded by
a BARRIER. In that case, we are done with this block because it
has no continuation. */
if (insn == 0 || INSN_DELETED_P (insn))
/* If TO was the last insn in the function, we are done. */
if (insn == 0)
return 0;
/* If TO was preceded by a BARRIER we are done with this block
because it has no continuation. */
prev = prev_nonnote_insn (to);
if (prev && GET_CODE (prev) == BARRIER)
return insn;
/* Find the end of the following block. Note that we won't be
following branches in this case. */
to_usage = 0;
val.path_size = 0;
cse_end_of_basic_block (insn, &val, 0, 0, 0);