commit 0c1b0a23f1fe7db6a2e391b7cb78cff900377772
author Wilco Dijkstra <wilco.dijkstra@arm.com> Wed Nov 23 17:27:19 2022 +0000
committer Wilco Dijkstra <wilco.dijkstra@arm.com> Thu Nov 24 13:30:04 2022 +0000
tree 3635f99729a30103f7954badb0a4a127ac77e6b3
parent 138ee8f7453ffdd6856caf35cf32be6661086a54

AArch64: Add fma_reassoc_width [PR107413]

Add a reassocation width for FMA in per-CPU tuning structures. Keep
the existing setting of 1 for cores with 2 FMA pipes (this disables
reassociation), and use 4 for cores with 4 FMA pipes.  This improves
SPECFP2017 on Neoverse V1 by ~1.5%.

gcc/
	PR tree-optimization/107413
	* config/aarch64/aarch64.cc (struct tune_params): Add
	fma_reassoc_width to all CPU tuning structures.
	(aarch64_reassociation_width): Use fma_reassoc_width.
	* config/aarch64/aarch64-protos.h (struct tune_params): Add
	fma_reassoc_width.