codegen: take gc roots (and alloca alignment) more seriously #55336
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vtjnash
added
compiler:codegen
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Can we get a test? At the very least a codegen test if the runtime behavior is non-deterministic. |
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Also maybe split this into two commits. One that does the seemingly NFC changes to use the |
gbaraldi
reviewed
Aug 2, 2024
| if (!isboxed && Order != AtomicOrdering::NotAtomic && !elty->isIntOrPtrTy()) { | ||
| intcast_eltyp = elty; | ||
| elty = Type::getIntNTy(ctx.builder.getContext(), 8 * nb); |
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Does this need a check so that N isn't too large? Or does the code that falls back to a lock avoid that?
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there is no limit on how large N can be per the standard (but yes, we limit to MAX_ATOMIC_SIZE because it generates better code)
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Added some tests to exercise this case, which was good because it found that #54121 had also introduced bugs in there recently when the spelling of the |
Later code likes to see that the type is consistent with the cgval and the unbox.
Due to limitations in the LLVM implementation, we are forced to emit fairly bad code here. But we need to make sure it is still correct with respect to GC rooting. The PR 50833c8 also changed the meaning of haspadding without changing all of the existing users to use the new equivalent flag (haspadding || !isbitsegal), incurring additional breakage here as well and needing more tests for that. Fixes #54720
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I started backporting this but got a bit uncomfortable that I did things right. @vtjnash maybe you could do it instead? |
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Pushed to backports-release-1.11 branch. For future cases like this, note that Visual Studio Code was able to complete almost the entire merge automatically (where git itself failed quite a bit). Although not quite complete, since it also uncovered a bug, which I pushed to the backports branch and opened on master here: #55530 |
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
removed
the
backport 1.11
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Due to limitations in the LLVM implementation, we are forced to emit fairly bad code here. But we need to make sure it is still correct with respect to GC rooting.
Fixes #54720