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Optimize initialization of mostly zeroed aggregates (#7542) This PR implements additional optimization based on `init_aggr` introduced in #7530 that lowers mostly-zeroed aggregates to a single `mem_clear_val` followed by a smaller number of `store`s. The decision to apply the optimization is based on an approximative heuristics that does not count the gas cost of the `store` based initialization and compares it to `mem_clear_val` and `store`s, but rather inspects the ratio of zeroed and not-zeroed elements in the aggregate. If the ratio is larger than the fixed threshold of 75%, the optimization is applied. The threshold is determined empirically by running benchmarks on real-life projects, most notably o2. The performance gains on real-life projects are minimal. E.g., on the o2 `trade-account` benchmarks: | | Improvements | Regressions | | - | -: | -: | | Count | 21 | — | | Average | 0.11% | — | | Median | 0.14% | — | | Max | 0.26% | — | | Min | 0.02% | — | Performance improvements on Sway tests are given in the comment below. The large regressions are analyzed. They are coming from non-realistic test conditions where all code get's inlined and SROA eliminates the aggregate if the `mem_clear_val` is not present. --------- Co-authored-by: Igor Rončević <ironcev@hotmail.com>

master

5 hours ago

Fix issue of calculating skip initialization with removed `init_aggr`

vaivaswatha/aggr_init_mostly_zero

20 hours ago

Add additional tests for `init_aggr` instruction and its lowering (#7678) ## Description This PR extends #7677 by: - addressing the issue of circular validation. In some of the tests, a created nested aggregate was asserted aginst an expected aggregate. A potential bug in initialization that might produce a same invalid value in the nested and expected aggregate would pass unnoticed. - adding more tests for the mostly-zeroed aggregates optimization that is being developed in #7542. - adding more `issues` tests. Those cover edge cases inspected while working on #7542 that were causing ICEs or sub-optimal lowerings. ## Checklist - [x] I have linked to any relevant issues. - [x] I have commented my code, particularly in hard-to-understand areas. - [ ] I have updated the documentation where relevant (API docs, the reference, and the Sway book). - [ ] If my change requires substantial documentation changes, I have [requested support from the DevRel team](https://github.com/FuelLabs/devrel-requests/issues/new/choose) - [x] I have added tests that prove my fix is effective or that my feature works. - [ ] I have added (or requested a maintainer to add) the necessary `Breaking*` or `New Feature` labels where relevant. - [x] I have done my best to ensure that my PR adheres to [the Fuel Labs Code Review Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md). - [x] I have requested a review from the relevant team or maintainers.

master

21 hours ago

Merge branch 'master' into vaivaswatha/aggr_init_mostly_zero

vaivaswatha/aggr_init_mostly_zero

1 day ago

Removing verify-ir from the CLI (#7672) ## Description This PR removes "verify-ir" from the CLI, because we now run verify after each optimization pass. The performance impact seems to be minimal and it is well worthy the extra security it brings. This brought to attention a problem that the pass "arg-demotion" had with blocks with "never" as arguments. A better fix will be pushed later, but for now, the pass does not generate a miscompilation anymore. Otehr smal fixes were "filter-fn" not working with contracts, and the IR printer not correctly printings storage key address with 64 characters when they start with zero. ## Checklist - [x] I have linked to any relevant issues. - [x] I have commented my code, particularly in hard-to-understand areas. - [x] I have updated the documentation where relevant (API docs, the reference, and the Sway book). - [ ] If my change requires substantial documentation changes, I have [requested support from the DevRel team](https://github.com/FuelLabs/devrel-requests/issues/new/choose) - [x] I have added tests that prove my fix is effective or that my feature works. - [x] I have added (or requested a maintainer to add) the necessary `Breaking*` or `New Feature` labels where relevant. - [x] I have done my best to ensure that my PR adheres to [the Fuel Labs Code Review Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md). - [x] I have requested a review from the relevant team or maintainers.

master

1 day ago

Adjust requires contract deployment, IR, and snapshot tests

vaivaswatha/aggr_init_mostly_zero

2 days ago

Adjust the threshold based on benchmarks

vaivaswatha/aggr_init_mostly_zero

2 days ago

Fix Clippy and fmt issues

vaivaswatha/aggr_init_mostly_zero

2 days ago

Latest Branches

-21%

Optimize initialization of mostly zeroed aggregates#7542

21 hours ago

68201b3

vaivaswatha/aggr_init_mostly_zero

0%

Removing verify-ir from the CLI#7672

3 days ago

93f2863

xunilrj/removing-cli-verify

0%

fix modified in optimisation passes so they converge#7666

14 days ago

5946264

xunilrj/fix-opt-passes-convergence

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