Make watchpoint_unaligned2 test pass with LTO enabled

Author: rocallahan

src/test/watchpoint_unaligned2.c

@@ -7,18 +7,15 @@ struct {
   uint32_t high;
 } value;
 
-static void breakpoint(void) {
-  // Put something in here so the optimizer can't eat this function.
-  atomic_puts(".");
-}
-
 int main(void) {
-  breakpoint();
-
-  // -O3 should consolidate these into a single load.
+  // -O3 should consolidate these into a single store.
   value.low = 1;
   value.high = 2;
 
+  // This will fail; we just want the compiler to not optimize out
+  // the store.
+  write(STDIN_FILENO, &value, sizeof(value));
+
   atomic_puts("EXIT-SUCCESS");
   return 0;
 }

src/test/watchpoint_unaligned2.py

@@ -1,6 +1,6 @@
 from util import *
 
-send_gdb('b breakpoint')
+send_gdb('b main')
 expect_gdb('Breakpoint 1')
 
 send_gdb('c')