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(copy_loop_body, case JUMP_INSN): Don't abort if invert_exp fails.

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(copy_loop_body, case JUMP_INSN): Don't abort if invert_exp
fails.  Instead, redirect the jump around an unconditional branch.

From-SVN: r8282
This commit is contained in:
Richard Earnshaw 1994-10-17 13:25:38 +00:00
parent 6782074d40
commit ca72f752bf
1 changed files with 26 additions and 6 deletions
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32
gcc/unroll.c
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@ -1746,12 +1746,32 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
case to be a branch past the end of the loop, and the
original jump label case to fall_through. */
if (! invert_exp (pattern, copy)
|| ! redirect_exp (&pattern,
map->label_map[CODE_LABEL_NUMBER
(JUMP_LABEL (insn))],
exit_label, copy))
abort ();
if (invert_exp (pattern, copy))
{
if (! redirect_exp (&pattern,
map->label_map[CODE_LABEL_NUMBER
(JUMP_LABEL (insn))],
exit_label, copy))
abort ();
}
else
{
rtx jmp;
rtx lab = gen_label_rtx ();
/* Can't do it by reversing the jump (probably becasue we
couln't reverse the conditions), so emit a new
jump_insn after COPY, and redirect the jump around
that. */
jmp = emit_jump_insn_after (gen_jump (exit_label), copy);
jmp = emit_barrier_after (jmp);
emit_label_after (lab, jmp);
LABEL_NUSES (lab) = 0;
if (! redirect_exp (&pattern,
map->label_map[CODE_LABEL_NUMBER
(JUMP_LABEL (insn))],
lab, copy))
abort ();
}
}
#ifdef HAVE_cc0