haifa-sched.cc:remove_notes asserts that it lands on a real (non-note)
insn after advancing past NOTE_INSN_EPILOGUE_BEG, but with the upcoming
post-RA aarch64 load pair pass enabled, we can land on
NOTE_INSN_DELETED.
This patch adjusts remove_notes to remove these if they occur at the
start of the epilogue instead of asserting.
Bootstrapped/regtested as a series on aarch64-linux-gnu, OK for trunk?
gcc/ChangeLog:
* haifa-sched.cc (remove_notes): Allow for NOTE_INSN_DELETED at
the start of the epilgoue, remove these.
---
gcc/haifa-sched.cc | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/gcc/haifa-sched.cc b/gcc/haifa-sched.cc
index 8e8add709b3..9f45528fbe9 100644
--- a/gcc/haifa-sched.cc
+++ b/gcc/haifa-sched.cc
@@ -4249,6 +4249,17 @@ remove_notes (rtx_insn *head, rtx_insn *tail)
&& NOTE_KIND (next) == NOTE_INSN_BASIC_BLOCK
&& next != next_tail)
next = NEXT_INSN (next);
+
+ /* Skip over any NOTE_INSN_DELETED at the start of the epilogue.
+ */
+ while (NOTE_P (next)
+ && NOTE_KIND (next) == NOTE_INSN_DELETED)
+ {
+ auto tmp = NEXT_INSN (next);
+ delete_insn (next);
+ next = tmp;
+ }
+
gcc_assert (INSN_P (next));
add_reg_note (next, REG_SAVE_NOTE,
GEN_INT (NOTE_INSN_EPILOGUE_BEG));
