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File _service:tar_scm:LoongArch-Change-the-default-value-of-LARCH_CALL_RAT.patch of Package gcc
From 59824f1062d77d0e02ea82d47415bf95c235de87 Mon Sep 17 00:00:00 2001 From: chenxiaolong <chenxl04200420@163.com> Date: Thu, 15 Jun 2023 02:46:24 +0000 Subject: [PATCH 046/124] LoongArch: Change the default value of LARCH_CALL_RATIO to 6. During the regression testing of the LoongArch architecture GCC, it was found that the tests in the pr90883.C file failed. The problem was modulated and found that the error was caused by setting the macro LARCH_CALL_RATIO to a too large value. Combined with the actual LoongArch architecture, the different thresholds for meeting the test conditions were tested using the engineering method (SPEC CPU 2006), and the results showed that its optimal threshold should be set to 6. gcc/ChangeLog: * config/loongarch/loongarch.h (LARCH_CALL_RATIO): Modify the value of macro LARCH_CALL_RATIO on LoongArch to make it perform optimally. Signed-off-by: Peng Fan <fanpeng@loongson.cn> Signed-off-by: ticat_fp <fanpeng@loongson.cn> --- gcc/config/loongarch/loongarch.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gcc/config/loongarch/loongarch.h b/gcc/config/loongarch/loongarch.h index 44ebadfaa..0e35d4dec 100644 --- a/gcc/config/loongarch/loongarch.h +++ b/gcc/config/loongarch/loongarch.h @@ -1073,7 +1073,7 @@ typedef struct { /* The base cost of a memcpy call, for MOVE_RATIO and friends. These values were determined experimentally by benchmarking with CSiBE. */ -#define LARCH_CALL_RATIO 8 +#define LARCH_CALL_RATIO 6 /* Any loop-based implementation of cpymemsi will have at least LARCH_MAX_MOVE_OPS_PER_LOOP_ITER memory-to-memory -- 2.33.0
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