- to 16byte boundary. Exact wording is:
-
- An array uses the same alignment as its elements, except that a local or
- global array variable of length at least 16 bytes or
- a C99 variable-length array variable always has alignment of at least 16 bytes.
-
- This was added to allow use of aligned SSE instructions at arrays. This
- rule is meant for static storage (where compiler can not do the analysis
- by itself). We follow it for automatic variables only when convenient.
- We fully control everything in the function compiled and functions from
- other unit can not rely on the alignment.
-
- Exclude va_list type. It is the common case of local array where
- we can not benefit from the alignment. */
- if (TARGET_64BIT && optimize_function_for_speed_p (cfun)
- && TARGET_SSE)