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| author | Jan Hubicka <jh@suse.cz> | 2001-05-17 19:40:48 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-05-17 17:40:48 +0000 |
| commit | 8f7785933c54f04b205d43351907d2b1c93eea9a (patch) | |
| tree | d52e05afdcdc9330a9c9b5016b521792970e08bb /gcc | |
| parent | b2040e7b55b41fcec68c984678a08fc0267ad3c7 (diff) | |
| download | gcc-8f7785933c54f04b205d43351907d2b1c93eea9a.zip gcc-8f7785933c54f04b205d43351907d2b1c93eea9a.tar.gz gcc-8f7785933c54f04b205d43351907d2b1c93eea9a.tar.bz2 | |
* simplify-rtx.c (simplify_subreg): Avoid creating of incorrect subregs.
From-SVN: r42212
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b256242..4087617 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Thu May 17 19:40:03 CEST 2001 Jan Hubicka <jh@suse.cz> + + * simplify-rtx.c (simplify_subreg): Avoid creating of incorrect subregs. + 2001-05-17 Bernd Schmidt <bernds@redhat.com> * expr.c (protect_from_queue): Protect against subsequent calls to diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 44cfc3b..fd1b630 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2331,6 +2331,10 @@ simplify_subreg (outermode, op, innermode, byte) % UNITS_PER_WORD)); } + /* Bail out in case resulting subreg would be incorrect. */ + if (final_offset % GET_MODE_SIZE (outermode) + || final_offset >= GET_MODE_SIZE (innermostmode)) + return NULL; /* Recurse for futher possible simplifications. */ new = simplify_subreg (outermode, SUBREG_REG (op), GET_MODE (SUBREG_REG (op)), |