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sched-rgn.c (add_branch_dependences): Don't allow insns that throw to move away from the end of the block. 

* sched-rgn.c (add_branch_dependences): Don't allow insns that throw
        to move away from the end of the block.

From-SVN: r50549
This commit is contained in:
Richard Henderson 2002-03-10 15:40:44 -08:00 committed by Richard Henderson
parent 4a58ee54e7
commit 1ef4956d35
2 changed files with 10 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-03-10 Richard Henderson <rth@redhat.com>
* sched-rgn.c (add_branch_dependences): Don't allow insns that throw
to move away from the end of the block.
2002-03-10 Neil Booth <neil@daikokuya.demon.co.uk>
PR preprocessor/5899

9
gcc/sched-rgn.c
View File

@ -2277,10 +2277,10 @@ add_branch_dependences (head, tail)
{
rtx insn, last;
/* For all branches, calls, uses, clobbers, and cc0 setters, force them
to remain in order at the end of the block by adding dependencies and
giving the last a high priority. There may be notes present, and
prev_head may also be a note.
/* For all branches, calls, uses, clobbers, cc0 setters, and instructions
that can throw exceptions, force them to remain in order at the end of
the block by adding dependencies and giving the last a high priority.
There may be notes present, and prev_head may also be a note.
Branches must obviously remain at the end. Calls should remain at the
end since moving them results in worse register allocation. Uses remain
@ -2293,6 +2293,7 @@ add_branch_dependences (head, tail)
|| (GET_CODE (insn) == INSN
&& (GET_CODE (PATTERN (insn)) == USE
|| GET_CODE (PATTERN (insn)) == CLOBBER
|| can_throw_internal (insn)
#ifdef HAVE_cc0
|| sets_cc0_p (PATTERN (insn))
#endif