diff options
| author | amodra <amodra@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-05-27 07:41:50 +0000 |
|---|---|---|
| committer | amodra <amodra@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-05-27 07:41:50 +0000 |
| commit | ebf4467dc36ac0532ed5d0d7c463313e52bf7af9 (patch) | |
| tree | dab3ea8a505686bcd5d39b18a2d6c0ead1478474 /gcc | |
| parent | 7be583b48b04633a592ab530473b7f995955b160 (diff) | |
| download | ppe42-gcc-ebf4467dc36ac0532ed5d0d7c463313e52bf7af9.tar.gz ppe42-gcc-ebf4467dc36ac0532ed5d0d7c463313e52bf7af9.zip | |
PR target/14478
* config/rs6000/rs6000.c (reg_or_neg_short_operand): Don't allow zero.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@82315 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a13cbdde627..353c25cfbbb 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-05-27 Alan Modra <amodra@bigpond.net.au> + + PR target/14478 + * config/rs6000/rs6000.c (reg_or_neg_short_operand): Don't allow zero. + 2004-05-27 Josef Zlomek <zlomekj@suse.cz> PR middle-end/14084 diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index e6ce004129b..4b23dccb717 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -1407,13 +1407,16 @@ reg_or_short_operand (rtx op, enum machine_mode mode) } /* Similar, except check if the negation of the constant would be - valid for a D-field. */ + valid for a D-field. Don't allow a constant zero, since all the + patterns that call this predicate use "addic r1,r2,-constant" on + a constant value to set a carry when r2 is greater or equal to + "constant". That doesn't work for zero. */ int reg_or_neg_short_operand (rtx op, enum machine_mode mode) { if (GET_CODE (op) == CONST_INT) - return CONST_OK_FOR_LETTER_P (INTVAL (op), 'P'); + return CONST_OK_FOR_LETTER_P (INTVAL (op), 'P') && INTVAL (op) != 0; return gpc_reg_operand (op, mode); } |
