From: Jiahao Xu <xujiahao@loongson.cn>
Date: Thu, 16 Nov 2023 08:44:36 +0000 (+0800)
Subject: LoongArch: Increase cost of vector aligned store/load.
X-Git-Tag: basepoints/gcc-15~4594
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37183018134049a70482a59b8f12180946ab8fa4;p=thirdparty%2Fgcc.git

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 --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 738911661d74..d05743bec874 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;