gcc/testsuite/c-c++-common/analyzer/feasibility-pr107948.c

   1 #include "analyzer-decls.h"
   2
   3 void foo(int width) {
   4   int i = 0;
   5   int base;
   6   if (width > 0){
   7     __analyzer_eval(i == 0); /* { dg-warning "TRUE" } */
   8     __analyzer_eval(width > 0); /* { dg-warning "TRUE" } */
   9     __analyzer_eval(width - i > 0); /* { dg-warning "TRUE" } */
  10     __analyzer_eval(i - width <= 0); /* { dg-warning "TRUE" } */
  11     if (i - width <= 0) {
  12       base = 512;
  13     }
  14     else {
  15       __analyzer_dump_path (); /* { dg-bogus "path" } */
  16     }
  17     base+=1; /* { dg-bogus "uninit" } */
  18   }
  19 }
  20
  21 void test_ge_zero (int x)
  22 {
  23   if (x >= 0)
  24     {
  25       __analyzer_eval(x >= 0); /* { dg-warning "TRUE" } */
  26       __analyzer_eval(x > 0); /* { dg-warning "UNKNOWN" } */
  27       __analyzer_eval(x <= 0); /* { dg-warning "UNKNOWN" } */
  28       __analyzer_eval(x < 0); /* { dg-warning "FALSE" } */
  29       __analyzer_eval(-x <= 0); /* { dg-warning "TRUE" } */
  30       __analyzer_eval(-x < 0); /* { dg-warning "UNKNOWN" } */
  31       __analyzer_eval(-x >= 0); /* { dg-warning "UNKNOWN" } */
  32       __analyzer_eval(-x > 0); /* { dg-warning "FALSE" } */
  33     }
  34 }
  35
  36 void test_gt_zero (int x)
  37 {
  38   if (x > 0)
  39     {
  40       __analyzer_eval(x >= 0); /* { dg-warning "TRUE" } */
  41       __analyzer_eval(x > 0); /* { dg-warning "TRUE" } */
  42       __analyzer_eval(x <= 0); /* { dg-warning "FALSE" } */
  43       __analyzer_eval(x < 0); /* { dg-warning "FALSE" } */
  44       __analyzer_eval(-x <= 0); /* { dg-warning "TRUE" } */
  45       __analyzer_eval(-x < 0); /* { dg-warning "TRUE" } */
  46       __analyzer_eval(-x >= 0); /* { dg-warning "FALSE" } */
  47       __analyzer_eval(-x > 0); /* { dg-warning "FALSE" } */
  48     }
  49 }