* [PATCH 1/2] LoongArch: Increase cost of vector aligned store/load.
@ 2023-11-16 8:27 Jiahao Xu
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From: Jiahao Xu @ 2023-11-16 8:27 UTC (permalink / raw)
To: gcc-patches; +Cc: xry111, i, chenglulu, xuchenghua, Jiahao Xu
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 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;
--
2.20.1
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