Re: Re: [PATCH] RISCV: Fix PR111074 [GCC13 BUG]

["Li Xu" <xuli1@eswincomputing.com>]

Committed, thanks all.

--------------
Li Xu
>The test case is too complicated and I can't simplify it, so no test case is added.
>
>--------------
>Li Xu
>>From: xuli <xuli1@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