diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/loop.c | 13 |
2 files changed, 18 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 778b0d7..6b413d6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2002-02-06 Janis Johnson <janis187@us.ibm.com> + Jan Hubicka <jh@suse.cz> + + * loop.c (remove_constant_addition): Avoid clobbering a shared + CONST expression. + 2002-02-06 Ulrich Weigand <uweigand@de.ibm.com> * config.gcc (s390x-*-linux*): Add t-linux64 makefile fragment. @@ -3683,8 +3683,19 @@ remove_constant_addition (x) HOST_WIDE_INT addval = 0; rtx exp = *x; + /* Avoid clobbering a shared CONST expression. */ if (GET_CODE (exp) == CONST) - exp = XEXP (exp, 0); + { + if (GET_CODE (XEXP (exp, 0)) == PLUS + && GET_CODE (XEXP (XEXP (exp, 0), 0)) == SYMBOL_REF + && GET_CODE (XEXP (XEXP (exp, 0), 1)) == CONST_INT) + { + *x = XEXP (XEXP (exp, 0), 0); + return INTVAL (XEXP (XEXP (exp, 0), 1)); + } + return 0; + } + if (GET_CODE (exp) == CONST_INT) { addval = INTVAL (exp); |