From: xuli <xu...@eswincomputing.com>
This patch fixes this issue happens on GCC-13.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111074
This patch should be backported to GCC-13.
GCC-14 has rewritten propagate_avl function, so there is no issue.
PR target/111074
gcc/ChangeLog:
* config/riscv/riscv-vsetvl.cc (extract_single_source): Fix bug.
---
gcc/config/riscv/riscv-vsetvl.cc | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/config/riscv/riscv-vsetvl.cc b/gcc/config/riscv/riscv-vsetvl.cc
index 789eb04b78d..bd45cb97e63 100644
--- a/gcc/config/riscv/riscv-vsetvl.cc
+++ b/gcc/config/riscv/riscv-vsetvl.cc
@@ -1183,6 +1183,9 @@ extract_single_source (set_info *set)
return nullptr;
hash_set<set_info *> sets = get_all_sets (set, true, false, true);
+ if (sets.is_empty ())
+ return nullptr;
+
insn_info *first_insn = (*sets.begin ())->insn ();
if (first_insn->is_artificial ())
return nullptr;
--
2.17.1
