[Bug tree-optimization/108724] Poor codegen when summing two arrays without AVX or SSE

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108724

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |crazylht at gmail dot com

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
Guess it's related to 

 8537bool
 8538vect_can_vectorize_without_simd_p (tree_code code)
 8539{
 8540  switch (code)
 8541    {
 8542    case PLUS_EXPR:
 8543    case MINUS_EXPR:
 8544    case NEGATE_EXPR:
 8545    case BIT_AND_EXPR:
 8546    case BIT_IOR_EXPR:
 8547    case BIT_XOR_EXPR:
 8548    case BIT_NOT_EXPR:
 8549      return true;
 8550
 8551    default:
 8552      return false;
 8553    }

vectorizer will still do vectorization even without simd instructions.