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LoongArch: Change the default value of LARCH_CALL_RATIO to 6.

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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.
This commit is contained in:
chenxiaolong 2023-06-15 02:46:24 +00:00 • committed by Lulu Cheng
parent 9e3607e19b
commit 6cf8989c6e
1 changed files with 1 additions and 1 deletions
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gcc/config/loongarch/loongarch.h
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@ -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