gcc/testsuite/gcc.dg/ipa/propalign-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-early-inlining -fdump-ipa-cp -fdump-tree-optimized" } */
   3 /* { dg-skip-if "No alignment restrictions" { { ! natural_alignment_32 } && { ! natural_alignment_64 } } } */
   4
   5 #include <stdint.h>
   6
   7 extern int fail_the_test(void *);
   8 extern int pass_the_test(void *);
   9 extern int diversion (void *);
  10
  11 struct somestruct
  12 {
  13   void *whee;
  14   void *oops;
  15 };
  16
  17 struct container
  18 {
  19   struct somestruct first;
  20   struct somestruct buf[32];
  21 };
  22
  23 static int __attribute__((noinline))
  24 foo (void *p)
  25 {
  26   uintptr_t a = (uintptr_t) p;
  27
  28   if (a % 4)
  29     return fail_the_test (p);
  30   else
  31     return pass_the_test (p);
  32 }
  33
  34 int
  35 bar (void)
  36 {
  37   struct container c;
  38   return foo (c.buf);
  39 }
  40
  41
  42 static int
  43 through (struct somestruct *p)
  44 {
  45   diversion (p);
  46   return foo (&p[16]);
  47 }
  48
  49 int
  50 bar2 (void)
  51 {
  52   struct container c;
  53   through (c.buf);
  54 }
  55
  56 /* { dg-final { scan-ipa-dump "Adjusting align" "cp" } } */
  57 /* { dg-final { scan-tree-dump-not "fail_the_test" "optimized" } } */