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Make the memory GEP an inbounds GEP since the bounds check has happened somewhere else #55107

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merged 2 commits into from
Aug 8, 2024

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@gbaraldi gbaraldi commented Jul 12, 2024

This makes the code in #55090 look almost the same as it did before the change. Locally I wasn't able to reproduce the regression, but given it's vectorized code I suspect it is backend sensitive.
@Zentrik

Fixes #55090

@gbaraldi gbaraldi requested a review from vtjnash July 12, 2024 13:17
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Zentrik commented Jul 13, 2024

@nanosoldier runbenchmarks("sparse" || "array", vs=":master")

src/cgutils.cpp Outdated Show resolved Hide resolved
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Zentrik commented Jul 13, 2024

Could someone trigger nanosoldier on this, I don't seem to have perms. Thanks

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vtjnash commented Jul 13, 2024

You have permission unless you haven't made your membership in JuliaLang public

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Zentrik commented Jul 13, 2024

@nanosoldier runbenchmarks("sparse" || "array", vs=":master")

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Your benchmark job has completed - possible performance regressions were detected. A full report can be found here.

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Zentrik commented Jul 13, 2024

The regression still exists on nanosoldier and locally and this doesn't seem to have made much difference to performance. The optimized ir is essentially unchanged compared to master apart from some inbounds sprinkled on some geps. The only difference in the unoptimized ir with the fast version is i8s are used instead of i32s.

@vtjnash vtjnash merged commit 7e1f0be into master Aug 8, 2024
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@vtjnash vtjnash deleted the gb/memorygep branch August 8, 2024 19:27
@vtjnash vtjnash added the backport 1.11 Change should be backported to release-1.11 label Aug 8, 2024
@KristofferC KristofferC mentioned this pull request Aug 13, 2024
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lazarusA pushed a commit to lazarusA/julia that referenced this pull request Aug 17, 2024
The Julia memory model is always inbounds for GEP.

This makes the code in JuliaLang#55090
look almost the same as it did before the change. Locally I wasn't able
to reproduce the regression, but given it's vectorized code I suspect it
is backend sensitive.

Fixes JuliaLang#55090

Co-authored-by: Zentrik <[email protected]>
KristofferC pushed a commit that referenced this pull request Aug 19, 2024
The Julia memory model is always inbounds for GEP.

This makes the code in #55090
look almost the same as it did before the change. Locally I wasn't able
to reproduce the regression, but given it's vectorized code I suspect it
is backend sensitive.

Fixes #55090

Co-authored-by: Zentrik <[email protected]>
(cherry picked from commit 7e1f0be)
KristofferC added a commit that referenced this pull request Aug 26, 2024
Backported PRs:
- [x] #54962 <!-- Add timing to precompile trace compile -->
- [x] #55180 <!-- compress jit debuginfo for easy memory savings -->
- [x] #54919 <!-- Fix annotated join with non-concrete eltype iters -->
- [x] #55013 <!-- [docs] change docstring to match code -->
- [x] #55017 <!-- TOML: Make `Dates` a type parameter -->
- [x] #54033 <!-- Fix a bug in `stack`'s DimensionMismatch error message
-->
- [x] #55242 <!-- fix at-main docstring to not code quote a compat box
-->
- [x] #55261 <!-- Make `jl_*affinity` tests more portable -->
- [x] #54736 <!-- specificity: ensure fast-path in `sub/eq_msp` handle
missing `UnionAll` wrapper correctly. -->
- [x] #55299 <!-- typeintersect: fix bounds merging during inner
`intersect_all`. -->
- [x] #55302 <!-- Add `lbt_forwarded_funcs()` to debug LBT forwarding
issues -->
- [x] #55148 <!-- Random: Mark unexported public symbols as public -->
- [x] #55303 <!-- avoid overflowing show for OffsetArrays around typemax
-->
- [x] #55317 <!-- Restrict argument to `isleapyear(::Integer)` -->
- [x] #55327 <!-- Profile: Fix stdlib paths -->
- [x] #55330 <!-- [libblastrampoline] Bump to v5.11.0 -->
- [x] #55310 <!-- Preserve structure in scaling triangular matrices by
NaN -->
- [x] #55329 <!-- mapreduce: don't inbounds unknown functions -->
- [x] #55356 <!-- Profile: close files when assembling heap snapshot -->
- [x] #55371 <!-- Fix tr for block SymTridiagonal -->
- [x] #55307 <!-- Make REPL.TerminalMenus public -->
- [x] #55362 <!-- inference: fix missing LimitedAccuracy markers -->
- [x] #55306 <!-- AllocOpt: Fix stack lowering where alloca continas
boxed and unboxed data -->
- [x] #55395 <!-- fix #55389: type-unstable `join` -->
- [x] #55226 <!-- re-add `unsafe_convert` for Reinterpret and Reshaped
array -->
- [x] #55405 <!-- handle unbound vars in NTuple fields -->
- [x] #55365 <!-- ml-matches: ensure all methods are included -->
- [x] #55428 <!-- codegen: move undef freeze before promotion point -->
- [x] #55419 <!-- `stale_cachefile`: handle if the expected cache file
is missing -->
- [x] #55470 <!-- Add push! implementation for AbstractArray depending
only on resize! -->
- [x] #55483 <!-- fix hierarchy level of "API reference" in `Dates`
documentation -->
- [x] #55268 <!-- simplify complex atanh and remove singularity
perturbation -->
- [x] #55441 <!-- fix Event to use normal Condition variable -->
- [x] #55413 <!-- subtyping: fast path for lhs union and rhs typevar -->
- [x] #55492 <!-- build: add missing dependencies for expmap -->
- [x] #55507 <!-- Fix fast getptls ccall lowering. -->
- [x] #55424 <!-- add missing clamp function for IOBuffer -->
- [x] #55504 <!-- Update symmetric docstring to reflect the type of uplo
-->
- [x] #55107 <!-- Make the memory GEP an inbounds GEP since the bounds
check has happened somewhere else -->
- [x] #55411 <!-- Vendor the terminfo database for use with
base/terminfo.jl -->
- [x] #55452 <!-- Do not load `ScopedValues` with `using` -->
- [x] #55407 <!-- Remove deprecated non string API for LLVM pass
pipeline and parse all options -->
- [x] #55461 <!-- 🤖 [master] Bump the StyledStrings stdlib from d7496d2
to f6035eb -->
- [x] #55433 <!-- Backport #55407
to 1.11 -->
- [x] #55225 <!-- [1.11 backport] trace-compile: don't generate
`precompile` statements for OpaqueClosure methods (#55072) -->
- [x] #55212 <!-- Make `Base.depwarn()` public -->
- [x] #552
- [x] #55052 <!-- Fix `(l/r)mul!` with `Diagonal`/`Bidiagonal` -->
- [x] #55251 <!-- Restrict binary ops for Diagonal and Symmetric to
Number eltypes -->95 <!-- LAPACK: Aggressive constprop to concretely
infer syev!/syevd! -->
- [x] #55522 <!-- Fix tr for Symmetric/Hermitian block matrices -->

Need manual backport:
- [x] #55342 <!-- Ensure bidiagonal setindex! does not read indices in
error message -->

Contains multiple commits, manual intervention needed:

- [ ] #55336 <!-- codegen: take gc roots (and alloca alignment) more
seriously -->


Non-merged PRs with backport label:
- [ ] #55506 <!-- Fix indexing in _mapreducedim for OffsetArrays -->
- [ ] #55500 <!-- make jl_thread_suspend_and_get_state safe -->
- [ ] #55499 <!-- propagate the terminal's `displaysize` to the
`IOContext` used by the REPL -->
- [ ] #55458 <!-- Allow for generically extracting unannotated string
-->
- [ ] #55457 <!-- Make AnnotateChar equality consider annotations -->
- [ ] #55453 <!-- Privatise the annotations API, for StyledStrings -->
- [ ] #55443 <!-- Add test for upper/lower/titlecase and fix call -->
- [ ] #55355 <!-- relocation: account for trailing path separator in
depot paths -->
- [ ] #55220 <!-- `isfile_casesensitive` fixes on Windows -->
- [ ] #55169 <!-- `propertynames` for SVD respects private argument -->
- [ ] #54457 <!-- Make `String(::Memory)` copy -->
- [ ] #53957 <!-- tweak how filtering is done for what packages should
be precompiled -->
- [ ] #51479 <!-- prevent code loading from lookin in the versioned
environment when building Julia -->
- [ ] #50813 <!-- More doctests for Sockets and capitalization fix -->
- [ ] #50157 <!-- improve docs for `@inbounds` and
`Base.@propagate_inbounds` -->
- [ ] #41244 <!-- Fix shell `cd` error when working dir has been deleted
-->
@KristofferC KristofferC removed the backport 1.11 Change should be backported to release-1.11 label Aug 26, 2024
gbaraldi added a commit that referenced this pull request Sep 2, 2024
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