diff options
Diffstat (limited to 'gcc/gimple-ssa-strength-reduction.c')
| -rw-r--r-- | gcc/gimple-ssa-strength-reduction.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c index 87684b30543..46600a57f81 100644 --- a/gcc/gimple-ssa-strength-reduction.c +++ b/gcc/gimple-ssa-strength-reduction.c @@ -2028,6 +2028,17 @@ analyze_increments (slsr_cand_t first_dep, enum machine_mode mode, bool speed) incr_vec[i].cost = COST_INFINITE; + /* If we need to add an initializer, make sure we don't introduce + a multiply by a pointer type, which can happen in certain cast + scenarios. FIXME: When cleaning up these cast issues, we can + afford to introduce the multiply provided we cast out to an + unsigned int of appropriate size. */ + else if (!incr_vec[i].initializer + && TREE_CODE (first_dep->stride) != INTEGER_CST + && POINTER_TYPE_P (TREE_TYPE (first_dep->stride))) + + incr_vec[i].cost = COST_INFINITE; + /* For any other increment, if this is a multiply candidate, we must introduce a temporary T and initialize it with T_0 = stride * increment. When optimizing for speed, walk the |