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h8300.c (h8300_adjust_insn_length): Avoid trying to recognize USE, CLOBBER or SEQUENCE insns.

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* h8300.c (h8300_adjust_insn_length): Avoid trying to recognize
       USE, CLOBBER or SEQUENCE insns.
       * unroll.c (unroll_loop): For HAVE_cc0 machines, adjust copy_end_luid
       to account for the uncopied insn that sets cc0 at the end of the loop.

From-SVN: r26283
This commit is contained in:
Jeffrey A Law 1999-04-07 23:07:06 +00:00 • committed by Jeff Law
parent a45f333130
commit 47cf37f924
3 changed files with 20 additions and 0 deletions
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6
gcc/ChangeLog
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@ -13,6 +13,12 @@ Tue Apr 6 17:49:49 1999 Philip Blundell <pb@nexus.co.uk>
Wed Apr 7 14:07:34 1999 Jeffrey A Law (law@cygnus.com)
* h8300.c (h8300_adjust_insn_length): Avoid trying to recognize
USE, CLOBBER or SEQUENCE insns.
* unroll.c (unroll_loop): For HAVE_cc0 machines, adjust copy_end_luid
to account for the uncopied insn that sets cc0 at the end of the loop.
* unroll.c (copy_loop_body): Always ensure at least two insns
are in the copied loop.

6
gcc/config/h8300/h8300.c
View file

@ -3033,6 +3033,12 @@ h8300_adjust_insn_length (insn, length)
{
rtx pat;
/* We must filter these ou before calling get_attr_adjust_length. */
if (GET_CODE (PATTERN (insn)) == USE
|| GET_CODE (PATTERN (insn)) == CLOBBER
|| GET_CODE (PATTERN (insn)) == SEQUENCE)
return 0;
if (get_attr_adjust_length (insn) == ADJUST_LENGTH_NO)
return 0;

8
gcc/unroll.c
View file

@ -790,6 +790,14 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before,
since it will also be used outside the loop. */
if (GET_CODE (copy_end) == JUMP_INSN)
copy_end_luid--;
/* If we have a target that uses cc0, then we also must not duplicate
the insn that sets cc0 before the jump insn. */
#ifdef HAVE_cc0
if (GET_CODE (copy_end) == JUMP_INSN)
copy_end_luid--;
#endif
/* If copy_start points to the NOTE that starts the loop, then we must
use the next luid, because invariant pseudo-regs moved out of the loop
have their lifetimes modified to start here, but they are not safe