Hi all,

the below C code fails under Cygwin. More specifically, the environment is: Windows 8.1, Cygwin 2.3.1, GCC 4.9.3, CPU 'Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz', compilation options are '-O0 -mavx'. Is it indeed a bug in Cygwin or I don't understand something?

Cheers,
Ilya

#include "immintrin.h"

__m256 routine(void) {
  __m256 aux;
  return aux;
}

int main(void) {
  void *buf = malloc(1);
  __m256 res = routine();
  return 0;
}



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