diff options
Diffstat (limited to 'gcc/config/m32c/m32c.c')
| -rw-r--r-- | gcc/config/m32c/m32c.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/config/m32c/m32c.c b/gcc/config/m32c/m32c.c index de5f22a..b28d747 100644 --- a/gcc/config/m32c/m32c.c +++ b/gcc/config/m32c/m32c.c @@ -846,11 +846,19 @@ int m32c_cannot_change_mode_class (enum machine_mode from, enum machine_mode to, int rclass) { + int rn; #if DEBUG0 fprintf (stderr, "cannot change from %s to %s in %s\n", mode_name[from], mode_name[to], class_names[rclass]); #endif + /* If the larger mode isn't allowed in any of these registers, we + can't allow the change. */ + for (rn = 0; rn < FIRST_PSEUDO_REGISTER; rn++) + if (class_contents[rclass][0] & (1 << rn)) + if (! m32c_hard_regno_ok (rn, to)) + return 1; + if (to == QImode) return (class_contents[rclass][0] & 0x1ffa); |