diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/xtensa/xtensa.c | 5 |
2 files changed, 8 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 27435c675c5..36b8e05cf78 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-05-20 Max Filippov <jcmvbkbc@gmail.com> + + * config/xtensa/xtensa.c (init_alignment_context): Replace MULT + by BITS_PER_UNIT with ASHIFT by exact_log2 (BITS_PER_UNIT). + 2015-05-20 Jeff Law <law@redhat.com> * tree-ssa-threadupdate.c (mark_threaded_blocks): Properly diff --git a/gcc/config/xtensa/xtensa.c b/gcc/config/xtensa/xtensa.c index 1e8ecebc353..1f71117f453 100644 --- a/gcc/config/xtensa/xtensa.c +++ b/gcc/config/xtensa/xtensa.c @@ -1461,8 +1461,9 @@ init_alignment_context (struct alignment_context *ac, rtx mem) if (ac->shift != NULL_RTX) { /* Shift is the byte count, but we need the bitcount. */ - ac->shift = expand_simple_binop (SImode, MULT, ac->shift, - GEN_INT (BITS_PER_UNIT), + gcc_assert (exact_log2 (BITS_PER_UNIT) >= 0); + ac->shift = expand_simple_binop (SImode, ASHIFT, ac->shift, + GEN_INT (exact_log2 (BITS_PER_UNIT)), NULL_RTX, 1, OPTAB_DIRECT); ac->modemask = expand_simple_binop (SImode, ASHIFT, GEN_INT (GET_MODE_MASK (mode)), |