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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/unroll.c | 6 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1920597..da98037 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Thu Nov 27 12:20:19 1997 Jeffrey A Law (law@cygnus.com) + + * unroll.c (find_splittable_givs): Don't split givs with a dest_reg + that was created by loop. + Wed Nov 26 15:47:30 1997 Michael Meissner <meissner@cygnus.com> * rs6000.c (SMALL_DATA_REG): Register to use for small data relocs. diff --git a/gcc/unroll.c b/gcc/unroll.c index 10dfb8a..29f01b8 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -2668,6 +2668,12 @@ find_splittable_givs (bl, unroll_type, loop_start, loop_end, increment, { rtx giv_inc, value; + + /* If this is a new register, can't handle it since it does not have + an entry in reg_n_info. */ + if (REGNO (v->dest_reg) >= max_reg_before_loop) + continue; + /* Only split the giv if it has already been reduced, or if the loop is being completely unrolled. */ if (unroll_type != UNROLL_COMPLETELY && v->ignore) |