[committed] Fix ICE's due to jump-to-return optimization changes
Commit Message
v850 and rl78 failed to build newlib with an ICE. I've also got a
report from an ARM automated tester that looks like the same underlying
problem.
Basically we need to check if simple_return and return insns are
available before trying to use them.
Bootstrapped on x86_64 (regression testing in progress). Verified this
fixes the v850 and rl78 build failures. Installing on the trunk
momentarily.
Jeff
commit fe527a06a77093bc3de4ee2007516a4e9fa30f18
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.
@@ -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);