gcc/testsuite/gcc.dg/tree-ssa/restrict-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized-alias" } */
   3
   4 int *abc(int** __restrict a, int** __restrict b)
   5 {
   6   *a = 0;                     // clique 1 base 1
   7   asm volatile("":"+m"(*b));  // clique 0 base 0 (wrong)
   8   *a = 0;                     // clique 1 base 1
   9   return *b;                  // clique 1 base 2 (what it should be)
  10 }
  11
  12 /* { dg-final { scan-tree-dump-times "clique 1 base \[12\]" 5 "optimized" } } */
  13 /* On RTL we can DSE one of the stores of zero, on the GIMPLE level we
  14    do not bother to do disambiguation against asms.  */
  15 /* { dg-final { scan-tree-dump-times " = 0;" 1 "optimized" { xfail *-*-* } } } */
  16 /* { dg-final { scan-assembler-times "mov\[^\n\r\]*0" 1 { target { x86_64-*-* i?86-*-* } } } } */