diff options
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/loop.c | 9 |
2 files changed, 11 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d781a13..3ac3a3f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2000-11-21 Bernd Schmidt <bernds@redhat.co.uk> + * loop.c (consec_sets_giv): If the reg we're examining is anything + but UNKNOWN_INDUCT, do nothing. + Reset the reg's type to UNKNOWN_INDUCT before returning. + Mostly from Vladimir Makarov (vmakarov@redhat.com) * ia64.md (attr itanium_class): Define insn types as described in Itanium docs. @@ -6203,8 +6203,12 @@ consec_sets_giv (loop, first_benefit, p, src_reg, dest_reg, general_induction_var below, so we can allocate it on our stack. If this is a giv, our caller will replace the induct var entry with a new induction structure. */ - struct induction *v - = (struct induction *) alloca (sizeof (struct induction)); + struct induction *v; + + if (REG_IV_TYPE (ivs, REGNO (dest_reg)) != UNKNOWN_INDUCT) + return 0; + + v = (struct induction *) alloca (sizeof (struct induction)); v->src_reg = src_reg; v->mult_val = *mult_val; v->add_val = *add_val; @@ -6265,6 +6269,7 @@ consec_sets_giv (loop, first_benefit, p, src_reg, dest_reg, } } + REG_IV_TYPE (ivs, REGNO (dest_reg)) = UNKNOWN_INDUCT; *last_consec_insn = p; return v->benefit; } |