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(expand_function_end): If function is non-leaf and stack checking is

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requested, emit needed probes.

From-SVN: r14470
This commit is contained in:
Richard Kenner 1997-07-17 11:25:54 -04:00
parent edff249168
commit 11044f6690
1 changed files with 20 additions and 0 deletions
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20
gcc/function.c
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@ -5494,6 +5494,26 @@ expand_function_end (filename, line, end_bindings)
emit_insns_before (seq, tail_recursion_reentry);
}
/* If we are doing stack checking and this function makes calls,
do a stack probe at the start of the function to ensure we have enough
space for another stack frame. */
if (flag_stack_check && ! STACK_CHECK_BUILTIN)
{
rtx insn, seq;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == CALL_INSN)
{
start_sequence ();
probe_stack_range (STACK_CHECK_PROTECT,
GEN_INT (STACK_CHECK_MAX_FRAME_SIZE));
seq = get_insns ();
end_sequence ();
emit_insns_before (seq, tail_recursion_reentry);
break;
}
}
/* Warn about unused parms if extra warnings were specified. */
if (warn_unused && extra_warnings)
{