20-24 September 2021
US/Pacific timezone

BoF: Register pressure sensitivity in the gcc middle end

23 Sep 2021, 10:15
45m
GNU Tools track/Virtual-Room (LPC Virtual)

GNU Tools track/Virtual-Room

LPC Virtual

150
GNU Tools Track GNU Tools Track

Speaker

Aaron Sawdey (IBM)

Description

There are a number of optimizations done in the middle end that would benefit from understanding the amount of register pressure. Unrolling, inlining, and parallel reassociation are some that come to mind immediately. I think it would be good to have a discussion about how these optimizations might get pressure information to know how aggressive they should be.

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Primary author

Aaron Sawdey (IBM)

Presentation Materials