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64557
2019 Sep 11
2
Loop Opt WG Meeting Minutes for Sep 11, 2019
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Wed, Sep 11, 2019:
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- LICM vs Loop Sink Strategy (Whitney)
- LICM and SCEV expander host code with no regards to increased
live-ranges. This is a long standing issue where historically
preference has been to keep LICM more aggressive.
- Two questions from IBM side:
a. This problem is not specific to the POWER
2019 Sep 13
3
Loop Opt WG Meeting Minutes for Sep 11, 2019
...SCEV expander host code with no regards to increased
live-ranges. This is a long standing issue where historically
preference has been to keep LICM more aggressive.
This issue also motivated adding metadata to disable LICM (l
lvm.loop.licm.disable) recently. https://reviews.llvm.org/D64557
- Two questions from IBM side:
a. This problem is not specific to the POWER platform, so we are
wondering if other people are interested?
- b. Where would be the best place to address this issue?
- Since it's hard to come up with an accurate register pressure...