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Diffstat (limited to 'gcc/config/i386/i386.c')
| -rw-r--r-- | gcc/config/i386/i386.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 6d90a009cde..fa2957080ef 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -1653,6 +1653,21 @@ override_options (void) && !optimize_size) target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS; + /* ??? Unwind info is not correct around the CFG unless either a frame + pointer is present or M_A_O_A is set. Fixing this requires rewriting + unwind info generation to be aware of the CFG and propagating states + around edges. */ + if ((flag_unwind_tables || flag_asynchronous_unwind_tables + || flag_exceptions || flag_non_call_exceptions) + && flag_omit_frame_pointer + && !(target_flags & MASK_ACCUMULATE_OUTGOING_ARGS)) + { + if (target_flags_explicit & MASK_ACCUMULATE_OUTGOING_ARGS) + warning (0, "unwind tables currently require either a frame pointer " + "or -maccumulate-outgoing-args for correctness"); + target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS; + } + /* Figure out what ASM_GENERATE_INTERNAL_LABEL builds as a prefix. */ { char *p; |