[gcc r13-2888] Fix ICEs due to recent jump-to-return optimization

[Jeff Law]

https://gcc.gnu.org/g:5da546d7e0561def07c783e6ec897aaa9e7837c6

commit r13-2888-g5da546d7e0561def07c783e6ec897aaa9e7837c6
Author: Jeff Law <jeffreyalaw@gmail.com>
Date:   Tue Sep 27 01:44:38 2022 -0400

    Fix ICEs due to recent jump-to-return optimization
    
    gcc/
            * cfgrtl.cc (fixup_reorder_chain): Verify that simple_return
            and return are available before trying to use them.

Diff:
---
 gcc/cfgrtl.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/cfgrtl.cc b/gcc/cfgrtl.cc
index 90cd6ee56a7..281a432f6a6 100644
--- a/gcc/cfgrtl.cc
+++ b/gcc/cfgrtl.cc
@@ -4049,7 +4049,8 @@ fixup_reorder_chain (void)
       rtx_insn *ret, *use;
       basic_block dest;
       if (bb_is_just_return (e_fall->dest, &ret, &use)
-	  && (PATTERN (ret) == simple_return_rtx || PATTERN (ret) == ret_rtx))
+	  && ((PATTERN (ret) == simple_return_rtx && targetm.have_simple_return ())
+	      || (PATTERN (ret) == ret_rtx && targetm.have_return ())))
 	{
 	  ret_label = PATTERN (ret);
 	  dest = EXIT_BLOCK_PTR_FOR_FN (cfun);