[Bug target/64172] [4.9 Regression] Wrong code with GCC vector extensions on ARM when compiled without NEON

[siarhei.siamashka at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64172

Siarhei Siamashka <siarhei.siamashka at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |siarhei.siamashka at gmail dot com

--- Comment #1 from Siarhei Siamashka <siarhei.siamashka at gmail dot com> ---
Created attachment 34183
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34183&action=edit
partially reduced testcase

GCC 4.9.2

== Fails: ==

$ arm-none-linux-gnueabi-gcc -O2 preliminary-testcase-pr64172.c && ./a.out
a.out: preliminary-testcase-pr64172.c:91: main: Assertion `prng_state.d[3] ==
0xA7223834' failed.

== Works: ==

$ arm-none-linux-gnueabi-gcc -O1 preliminary-testcase-pr64172.c && ./a.out

$ arm-none-linux-gnueabi-gcc -O2 -mfpu=neon preliminary-testcase-pr64172.c &&
./a.out