gcc/testsuite/gcc.dg/stack-check-6.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fstack-clash-protection -fdump-rtl-pro_and_epilogue -fno-optimize-sibling-calls --param stack-clash-protection-probe-interval=12 --param stack-clash-protection-guard-size=12" } */
   3 /* { dg-require-effective-target supports_stack_clash_protection } */
   4
   5
   6 extern void foo (char *);
   7 extern void bar (void);
   8
   9
  10 /* This is a leaf with a frame that is large enough to require probing with
  11    a residual allocation, but small enough to probe inline.  */
  12 void
  13 f4 (void)
  14 {
  15   char buf[4096 + 512];
  16   asm volatile ("" : : "g" (&buf) : "memory");
  17 }
  18
  19
  20 /* This is a non-leaf with a frame large enough to require probing and
  21    a residual allocation, but small enough to probe inline.  */
  22 void
  23 f5 (void)
  24 {
  25   char buf[4096 + 512];
  26   foo (buf);
  27 }
  28
  29 /* This is a leaf with a frame that is large enough to require probing with
  30    a loop plus a residual allocation.  */
  31 void
  32 f6 (void)
  33 {
  34   char buf[4096 * 10 + 512];
  35   asm volatile ("" : : "g" (&buf) : "memory");
  36 }
  37
  38
  39 /* This is a non-leaf with a frame large enough to require probing with
  40    a loop plus a residual allocation.  */
  41 void
  42 f7 (void)
  43 {
  44   char buf[4096 * 10 + 512];
  45   foo (buf);
  46 }
  47
  48 /* { dg-final { scan-rtl-dump-times "Stack clash inline probes" 2 "pro_and_epilogue" } } */
  49 /* { dg-final { scan-rtl-dump-times "Stack clash probe loop" 2 "pro_and_epilogue" } } */
  50 /* { dg-final { scan-rtl-dump-times "Stack clash residual allocation in prologue" 4 "pro_and_epilogue" } } */
  51 /* { dg-final { scan-rtl-dump-times "Stack clash not noreturn" 4 "pro_and_epilogue" } } */
  52
  53 /* { dg-final { scan-rtl-dump-times "Stack clash no frame pointer needed" 4 "pro_and_epilogue" { target { ! frame_pointer_for_non_leaf } } } } */
  54 /* { dg-final { scan-rtl-dump-times "Stack clash no frame pointer needed" 2 "pro_and_epilogue" { target { frame_pointer_for_non_leaf } } } } */
  55 /* { dg-final { scan-rtl-dump-times "Stack clash frame pointer needed" 2 "pro_and_epilogue" { target { frame_pointer_for_non_leaf } } } } */