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sparc.c (sparc_nonflat_function_epilogue): If we are not going to emit return instructions... 

2002-04-05  David S. Miller  <davem@redhat.com>

	* config/sparc/sparc.c (sparc_nonflat_function_epilogue): If we
	are not going to emit return instructions, emit at least a nop
	for the sake of sane backtraces.

From-SVN: r51922
This commit is contained in:
David S. Miller 2002-04-05 07:01:46 -08:00 committed by David S. Miller
parent 98089de755
commit 2f734ea4c5
2 changed files with 22 additions and 6 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2002-04-05 David S. Miller <davem@redhat.com>
* config/sparc/sparc.c (sparc_nonflat_function_epilogue): If we
are not going to emit return instructions, emit at least a nop
for the sake of sane backtraces.
2002-04-05 Jakub Jelinek <jakub@redhat.com>
* mklibgcc.in: Use separate libgcc.map for each multilib.

22
gcc/config/sparc/sparc.c
View File

@ -3702,12 +3702,22 @@ sparc_nonflat_function_epilogue (file, size, leaf_function)
if (current_function_epilogue_delay_list == 0)
{
/* If code does not drop into the epilogue, we need
do nothing except output pending case vectors. */
rtx insn = get_last_insn ();
if (GET_CODE (insn) == NOTE)
insn = prev_nonnote_insn (insn);
if (insn && GET_CODE (insn) == BARRIER)
goto output_vectors;
do nothing except output pending case vectors.
We have to still output a dummy nop for the sake of
sane backtraces. Otherwise, if the last two instructions
of a function were call foo; dslot; this can make the return
PC of foo (ie. address of call instruction plus 8) point to
the first instruction in the next function. */
rtx insn;
fputs("\tnop\n", file);
insn = get_last_insn ();
if (GET_CODE (insn) == NOTE)
insn = prev_nonnote_insn (insn);
if (insn && GET_CODE (insn) == BARRIER)
goto output_vectors;
}
if (num_gfregs)