diff options
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 120d37a..ab88f23 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -2252,6 +2252,11 @@ may_trap_p_1 (const_rtx x, unsigned flags) /* Memory ref can trap unless it's a static var or a stack slot. */ case MEM: + /* Recognize specific pattern of stack checking probes. */ + if (flag_stack_check + && MEM_VOLATILE_P (x) + && XEXP (x, 0) == stack_pointer_rtx) + return 1; if (/* MEM_NOTRAP_P only relates to the actual position of the memory reference; moving it out of context such as when moving code when optimizing, might cause its address to become invalid. */ |