Yuta Mukai 0c5319e546 [ModuloSchedule][AArch64] Implement modulo variable expansion for pipelining (#65609) ...

Modulo variable expansion is a technique that resolves overlap of
variable lifetimes by unrolling. The existing implementation solves it
by making a copy by move instruction for processors with ordinary
registers such as Arm and x86. This method may result in a very large
number of move instructions, which can cause performance problems.

Modulo variable expansion is enabled by specifying -pipeliner-mve-cg. A
backend must implement some newly defined interfaces in
PipelinerLoopInfo. They were implemented for AArch64.

Discourse thread:
https://discourse.llvm.org/t/implementing-modulo-variable-expansion-for-machinepipeliner

2024-06-12 10:27:35 +09:00

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