[Bug tree-optimization/70509] wrong code with extract from a casted vector(64)

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70509

--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 38161
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38161&action=edit
reduced testcase, without casts

Output:
$ sde64 -- ./a.out 
00000009
Aborted