[PATCH i386 AVX512] [6/n] Update prefered modes for vectorizer.

[Kirill Yukhin]

Hello,
Patch allows wider vec int modes.

Bootstrapped.
Is it ok for trunk?

gcc/
        * config/i386/i386.c (ix86_preferred_simd_mode): Allow V64QImode and
        V32HImode.

--
Thanks, K

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 5a3b67a..183b7be 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -46474,9 +46474,11 @@ ix86_preferred_simd_mode (enum machine_mode mode)
   switch (mode)
     {
     case QImode:
-      return (TARGET_AVX && !TARGET_PREFER_AVX128) ? V32QImode : V16QImode;
+      return TARGET_AVX512BW ? V64QImode :
+       (TARGET_AVX && !TARGET_PREFER_AVX128) ? V32QImode : V16QImode;
     case HImode:
-      return (TARGET_AVX && !TARGET_PREFER_AVX128) ? V16HImode : V8HImode;
+      return TARGET_AVX512BW ? V32HImode :
+       (TARGET_AVX && !TARGET_PREFER_AVX128) ? V16HImode : V8HImode;
     case SImode:
       return TARGET_AVX512F ? V16SImode :
        (TARGET_AVX && !TARGET_PREFER_AVX128) ? V8SImode : V4SImode;