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| author | Richard Henderson <rth@cygnus.com> | 1998-10-04 16:59:58 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 1998-10-04 16:59:58 -0700 |
| commit | 861556b4d97e7b323621cb19ada8bbfefff26977 (patch) | |
| tree | c3ad8ec16738d3413956374c5ef8903d2301cd47 | |
| parent | 12a27dfc4e83a8e450b98063efc0b38207050000 (diff) | |
| download | gcc-861556b4d97e7b323621cb19ada8bbfefff26977.zip gcc-861556b4d97e7b323621cb19ada8bbfefff26977.tar.gz gcc-861556b4d97e7b323621cb19ada8bbfefff26977.tar.bz2 | |
combine.c (expand_field_assignment): Don't do bitwise operations on MODE_FLOAT; pun to MODE_INT if possible.
* combine.c (expand_field_assignment): Don't do bitwise operations
on MODE_FLOAT; pun to MODE_INT if possible.
From-SVN: r22826
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 18 |
2 files changed, 23 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8b04e88..7184fe4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Sun Oct 4 23:58:30 1998 Richard Henderson <rth@cygnus.com> + + * combine.c (expand_field_assignment): Don't do bitwise operations + on MODE_FLOAT; pun to MODE_INT if possible. + Sun Oct 4 18:33:24 1998 Jason Merrill <jason@yorick.cygnus.com> scott snyder <snyder@d0sgif.fnal.gov> diff --git a/gcc/combine.c b/gcc/combine.c index e2a0095..ce488e2 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5384,6 +5384,24 @@ expand_field_assignment (x) compute_mode = GET_MODE (inner); + /* Don't attempt bitwise arithmetic on non-integral modes. */ + if (! INTEGRAL_MODE_P (compute_mode)) + { + enum machine_mode imode; + + /* Something is probably seriously wrong if this matches. */ + if (! FLOAT_MODE_P (compute_mode)) + break; + + /* Try to find an integral mode to pun with. */ + imode = mode_for_size (GET_MODE_BITSIZE (compute_mode), MODE_INT, 0); + if (imode == BLKmode) + break; + + compute_mode = imode; + inner = gen_lowpart_for_combine (imode, inner); + } + /* Compute a mask of LEN bits, if we can do this on the host machine. */ if (len < HOST_BITS_PER_WIDE_INT) mask = GEN_INT (((HOST_WIDE_INT) 1 << len) - 1); |