diff options
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index fb590cdf673..ae76695a133 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -2610,6 +2610,10 @@ expand_mult_const (enum machine_mode mode, rtx op0, HOST_WIDE_INT val, accum = force_operand (gen_rtx_PLUS (mode, accum, op0), target); } + /* Compare only the bits of val and val_so_far that are significant + in the result mode, to avoid sign-/zero-extension confusion. */ + val &= GET_MODE_MASK (mode); + val_so_far &= GET_MODE_MASK (mode); if (val != val_so_far) abort (); |