diff options
| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-05-06 18:55:32 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-05-06 18:55:32 -0400 |
| commit | 5e6aa5131b827017f9a08f22d68f18931892808c (patch) | |
| tree | 027412b843ee1d29056a85154557b1612e2c536b /gcc/reload.c | |
| parent | a2cd7b455464e927c5bb7e0391d7fe9ed4d2f42d (diff) | |
| download | gcc-5e6aa5131b827017f9a08f22d68f18931892808c.zip gcc-5e6aa5131b827017f9a08f22d68f18931892808c.tar.gz gcc-5e6aa5131b827017f9a08f22d68f18931892808c.tar.bz2 | |
(find_reloads): Ignore alternatives that will not be reloadable due to
PREFERRED_RELOAD_CLASS.
From-SVN: r7257
Diffstat (limited to 'gcc/reload.c')
| -rw-r--r-- | gcc/reload.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 254867e..c141964 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -2953,6 +2953,17 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p) && operand_mode[i] != VOIDmode) losers++; + /* If we can't reload this value at all, reject this + alternative. Note that we could also lose due to + LIMIT_RELOAD_RELOAD_CLASS, but we don't check that + here. */ + + if (! CONSTANT_P (operand) + && (PREFERRED_RELOAD_CLASS (operand, + (enum reg_class) this_alternative[i]) + == NO_REGS)) + bad = 1; + /* We prefer to reload pseudos over reloading other things, since such reloads may be able to be eliminated later. If we are reloading a SCRATCH, we won't be generating any |