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kit
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sw_sparse.c (626B)

      1 /* A SPARSE switch: case values are few and far apart, so the backend lowers it
      2  * to a compare-and-branch chain (subs/cmp + b.eq) rather than a jump table.
      3  * volatile selector defeats constant folding; each comparison + conditional
      4  * branch is really emitted and the branch labels round-trip through `as`.
      5  * Selector 1000 hits the case returning 42. Exit code 42. */
      6 int sel(int x) {
      7   switch (x) {
      8     case 0:
      9       return 1;
     10     case 100:
     11       return 2;
     12     case 1000:
     13       return 42;
     14     case 9999:
     15       return 3;
     16     default:
     17       return 99;
     18   }
     19 }
     20 int test_main(void) {
     21   volatile int x = 1000;
     22   return sel(x);
     23 }