gcc/testsuite/c-c++-common/analyzer/symbolic-6.c

   1 #include "analyzer-decls.h"
   2
   3 int a[1024];
   4 int b[1024];
   5
   6 extern void escape (void *ptr);
   7
   8 void test_1 (int *p)
   9 {
  10   int c, d;
  11   escape (&c);
  12
  13   *p = 42;
  14   __analyzer_eval (*p == 42); /* { dg-warning "TRUE" } */
  15
  16   /* These writes shouldn't affect *p.  */
  17   c = 33;
  18   d = 44;
  19   __analyzer_eval (*p == 42); /* { dg-warning "TRUE" } */
  20
  21   /* This write could affect *p.  */
  22   a[16] = 55;
  23   __analyzer_eval (*p == 42); /* { dg-warning "UNKNOWN" } */
  24 }