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* [gcc r13-6745] lra: Ignore debug insns and notes in combine_reload_insn [PR109179]
@ 2023-03-18 0:03 Peter Bergner
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From: Peter Bergner @ 2023-03-18 0:03 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:44a13125a0d56dbabb9bc61de7ff8bf94fb57928
commit r13-6745-g44a13125a0d56dbabb9bc61de7ff8bf94fb57928
Author: Peter Bergner <bergner@linux.ibm.com>
Date: Fri Mar 17 19:01:45 2023 -0500
lra: Ignore debug insns and notes in combine_reload_insn [PR109179]
We ICE in combine_reload_insn if we've deleted the TO insn operand during
processing, because lra_get_insn_recog_data doesn't expect to see the note
that replaces the deleted insn. The solution here is to exit early if TO
is a debug insn or note.
2023-03-17 Peter Bergner <bergner@linux.ibm.com>
gcc/
PR rtl-optimization/109179
* lra-constraints.cc (combine_reload_insn): Enforce TO is not a debug
insn or note. Move the tests earlier to guard lra_get_insn_recog_data.
Diff:
---
gcc/lra-constraints.cc | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/gcc/lra-constraints.cc b/gcc/lra-constraints.cc
index 95b534e1a70..405b8b92f5e 100644
--- a/gcc/lra-constraints.cc
+++ b/gcc/lra-constraints.cc
@@ -5014,14 +5014,19 @@ combine_reload_insn (rtx_insn *from, rtx_insn *to)
enum reg_class to_class, from_class;
int n, nop;
signed char changed_nops[MAX_RECOG_OPERANDS + 1];
- lra_insn_recog_data_t id = lra_get_insn_recog_data (to);
- struct lra_static_insn_data *static_id = id->insn_static_data;
/* Check conditions for second memory reload and original insn: */
if ((targetm.secondary_memory_needed
== hook_bool_mode_reg_class_t_reg_class_t_false)
- || NEXT_INSN (from) != to || CALL_P (to)
- || id->used_insn_alternative == LRA_UNKNOWN_ALT
+ || NEXT_INSN (from) != to
+ || !NONDEBUG_INSN_P (to)
+ || CALL_P (to))
+ return false;
+
+ lra_insn_recog_data_t id = lra_get_insn_recog_data (to);
+ struct lra_static_insn_data *static_id = id->insn_static_data;
+
+ if (id->used_insn_alternative == LRA_UNKNOWN_ALT
|| (set = single_set (from)) == NULL_RTX)
return false;
from_reg = SET_DEST (set);
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