diff options
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index 437c9352631..ca4259a7fa4 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -1333,6 +1333,33 @@ allocate_dynamic_stack_space (size, target, known_align) emit_move_insn (target, virtual_stack_dynamic_rtx); #endif size = convert_modes (Pmode, ptr_mode, size, 1); + + /* Check stack bounds if necessary. */ + if (current_function_limit_stack) + { + rtx available; + rtx space_available = gen_label_rtx (); +#ifdef STACK_GROWS_DOWNWARD + available = expand_binop (Pmode, sub_optab, + stack_pointer_rtx, stack_limit_rtx, + NULL_RTX, 1, OPTAB_WIDEN); +#else + available = expand_binop (Pmode, sub_optab, + stack_limit_rtx, stack_pointer_rtx, + NULL_RTX, 1, OPTAB_WIDEN); +#endif + emit_cmp_and_jump_insns (available, size, GEU, NULL_RTX, Pmode, 1, + 0, space_available); +#ifdef HAVE_trap + if (HAVE_trap) + emit_insn (gen_trap ()); + else +#endif + error ("stack limits not supported on this target"); + emit_barrier (); + emit_label (space_available); + } + anti_adjust_stack (size); #ifdef SETJMP_VIA_SAVE_AREA if (setjmpless_size != NULL_RTX) |