gcc/testsuite/gcc.dg/pr86064.c

   1 /* { dg-do compile } */
   2 /* { dg-skip-if "split DWARF unsupported" { *-*-darwin* } } */
   3 /* { dg-options "-g -O2 -fno-var-tracking-assignments -gsplit-dwarf" } */
   4
   5 /* This used to fail with location views (implicitly) enabled, because
   6    var-tracking (not at assignments) creates a range for d starting at
   7    the load after the first call, and we did not split the range,
   8    despite its crossing between hot and cold partitions, because it's
   9    a single range, that we normally extend to the entire function.
  10    However, because the range starts at a (presumed) nonzero view, we
  11    end up outputting a loclist instead of a single location entry.
  12    But then, -gsplit-dwarf selects (startx,length) loclist entries,
  13    and the length ends up computing the difference between symbols in
  14    different subsections.  */
  15
  16 int a;
  17 __attribute__((__cold__)) void b();
  18
  19 void e(int *);
  20 int f();
  21
  22 void c() {
  23   int d;
  24   e(&d);
  25   a = d;
  26   if (f())
  27     b();
  28 }