memcheck/tests/amd64/rh2257546_128.c

   1
   2 // This should run on memcheck without reporting an undef-value error.
   3 // See https://bugzilla.redhat.com/show_bug.cgi?id=2257546
   4
   5 #include <stdio.h>
   6 #if defined(__APPLE__)
   7 #include <stdlib.h>
   8 #else
   9 #include <malloc.h>
  10 #endif
  11
  12 int main ( void )
  13 {
  14    char* c1 = malloc(16);
  15    c1[0] = 'x'; c1[1] = 'y'; c1[2] = 'x'; c1[3] = 0;
  16
  17    char* c2 = "foobarxyzzyfoobarzyzzy";  // strlen > 16
  18
  19    long long int res;
  20    __asm__ __volatile__(
  21    "movdqu   (%1),   %%xmm4"   "\n\t"
  22    "movdqu   (%2),   %%xmm5"   "\n\t"
  23    "pxor     %%xmm4, %%xmm5"   "\n\t"
  24    "ptest    %%xmm5, %%xmm5"   "\n\t"
  25    "je       zzz1f"            "\n\t"
  26    "mov      $99, %0"          "\n\t"
  27    "jmp      zzzafter"         "\n"
  28    "zzz1f:"                    "\n\t"
  29    "mov $88, %0"               "\n"
  30    "zzzafter:"                 "\n\t"
  31    : /*OUT*/"=r"(res) : /*IN*/"r"(c1),"r"(c2) : /*TRASH*/"xmm4","xmm5","cc"
  32    );
  33    printf("res = %lld\n", res);
  34    free(c1);
  35    return 0;
  36 }