[gcc r14-5545] LoongArch: Increase cost of vector aligned store/load.

[LuluCheng <chenglulu@gcc.gnu.org>]

https://gcc.gnu.org/g:37183018134049a70482a59b8f12180946ab8fa4

commit r14-5545-g37183018134049a70482a59b8f12180946ab8fa4
Author: Jiahao Xu <xujiahao@loongson.cn>
Date:   Thu Nov 16 16:44:36 2023 +0800

    LoongArch: Increase cost of vector aligned store/load.
    
    Based on SPEC2017 performance evaluation results, it's better to make them equal
    to the cost of unaligned store/load so as to avoid odd alignment peeling.
    
    gcc/ChangeLog:
    
            * config/loongarch/loongarch.cc
            (loongarch_builtin_vectorization_cost): Adjust.

Diff:
---
 gcc/config/loongarch/loongarch.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 738911661d7..d05743bec87 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -3893,11 +3893,9 @@ loongarch_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost,
       case scalar_stmt:
       case scalar_load:
       case vector_stmt:
-      case vector_load:
       case vec_to_scalar:
       case scalar_to_vec:
       case scalar_store:
-      case vector_store:
 	return 1;
 
       case vec_promote_demote:
@@ -3905,6 +3903,8 @@ loongarch_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost,
 	return LASX_SUPPORTED_MODE_P (mode)
 	  && !LSX_SUPPORTED_MODE_P (mode) ? 2 : 1;
 
+      case vector_load:
+      case vector_store:
       case unaligned_load:
       case unaligned_store:
 	return 2;