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| author | Richard Kenner <kenner@gcc.gnu.org> | 1997-07-17 11:25:54 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1997-07-17 11:25:54 -0400 |
| commit | 11044f6690c12aa40ed84655c9949e0e3ab16bd1 (patch) | |
| tree | 0062d75cd2f60f21cfeb9d982c65395fdc4f51c0 /gcc/function.c | |
| parent | edff249168080e7c7c893f57c0c578819afcb348 (diff) | |
| download | gcc-11044f6690c12aa40ed84655c9949e0e3ab16bd1.zip gcc-11044f6690c12aa40ed84655c9949e0e3ab16bd1.tar.gz gcc-11044f6690c12aa40ed84655c9949e0e3ab16bd1.tar.bz2 | |
(expand_function_end): If function is non-leaf and stack checking is
requested, emit needed probes.
From-SVN: r14470
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/function.c b/gcc/function.c index b2468de..582c4ca 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -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) { |