diff options
Diffstat (limited to 'gcc/regrename.c')
| -rw-r--r-- | gcc/regrename.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/regrename.c b/gcc/regrename.c index bd2373cbb5a..e70dae8d139 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -1314,6 +1314,10 @@ maybe_mode_change (enum machine_mode orig_mode, enum machine_mode copy_mode, enum machine_mode new_mode, unsigned int regno, unsigned int copy_regno ATTRIBUTE_UNUSED) { + if (GET_MODE_SIZE (copy_mode) < GET_MODE_SIZE (orig_mode) + && GET_MODE_SIZE (copy_mode) < GET_MODE_SIZE (new_mode)) + return NULL_RTX; + if (orig_mode == new_mode) return gen_rtx_raw_REG (new_mode, regno); else if (mode_change_ok (orig_mode, new_mode, regno)) |
