[Bug target/70421] [5/6 Regression] wrong code with v16si vector and useless cast at -O -mavx512f

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70421

--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> ---
The operation done by the vmovdqa32 instruction is inverted; this fixes the
assembly (-O3, intel syntax):

@@ -72,7 +72,7 @@
        and     rsp, -64        #,
        push    QWORD PTR [r10-8]       #
        push    rbp     #
-       mov     eax, 2  # tmp108,
+       mov     eax, 0xfd       # tmp108,
        kmovw   k1, eax # tmp108, tmp108
        xor     edx, ecx        # tmp106, tmp100
        .cfi_escape 0x10,0x6,0x2,0x76,0