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2023-02-03 r/5833 chore(tvix/eval): only use Rc with impure featureFlorian Klink1-2/+3
We only use Rc in `impl EvalIO for StdIO`, which is only included when building with the "impure" feature. Change-Id: Id29d647c899cbfcdda11abfb9fabd5aa7e24299f Reviewed-on: https://cl.tvl.fyi/c/depot/+/8025 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-02-03 r/5832 refactor(tvix/eval): wrap `Builtin` type in a BoxVincent Ambo1-20/+30
This reduces the size of `Builtin` from 88 (!) bytes to 8, and as the largest variant of `Value`, the size of that type from 96 to 64. The next largest type is NixList, clocking in at 64 bytes. This has noticeable performance impact. In an implementation without disk I/O, evaluating nixpkgs.stdenv looks like this: Benchmark 1: tvix -E '(import <nixpkgs> {}).stdenv.drvPath' Time (mean ± σ): 1.151 s ± 0.003 s [User: 1.041 s, System: 0.109 s] Range (min … max): 1.147 s … 1.155 s 10 runs After this change, it looks like this: Benchmark 1: tvix -E '(import <nixpkgs> {}).stdenv.drvPath' Time (mean ± σ): 1.046 s ± 0.004 s [User: 0.954 s, System: 0.092 s] Range (min … max): 1.041 s … 1.053 s 10 runs Change-Id: I5ab7cc02a9a450c0227daf1f1f72966358311ebb Reviewed-on: https://cl.tvl.fyi/c/depot/+/8027 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-02-03 r/5831 refactor(tvix/eval): statically resolve select from constant attrsVincent Ambo2-40/+90
When resolving a select expression (`attrs.name` or `attrs.name or default`), if the set compiles to a constant attribute set (as is most notably the case with `builtins`) we can backtrack and replace that attribute set directly with the compiled value. For something like `builtins.length`, this will directly emit an `OpConstant` that leaves the `length` builtin on the stack. Change-Id: I639654e065a06e8cfcbcacb528c6da7ec9e513ee Reviewed-on: https://cl.tvl.fyi/c/depot/+/7957 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-02-03 r/5828 fix(tvix/eval): ensure all evaluated thunks are correctly memoizedVincent Ambo5-51/+196
This fixes a very complicated bug (b/246). Evaluation progresses *much* further after this, leading to several less complicated bugs likely being uncovered by this What was the problem? ===================== Previously, when evaluating a thunk, we had a code path that looked like this: match *thunk { ThunkRepr::Evaluated(Value::Thunk(ref inner_thunk)) => { let inner_repr = inner_thunk.0.borrow().clone(); drop(thunk); self.0.replace(inner_repr); } /* ... */ } This code path created a copy of the inner `ThunkRepr` of a nested thunk, and moved that copy into the `ThunkRepr` of the parent. The effect of this was that the original `ThunkRepr` (unforced!) lived on in the original thunk, without the memoization of the subsequent forcing applying to it. This had the result that Tvix would repeatedly evaluate these thunks without ever memoizing them, if they occured repeatedly as shared inner thunks. Most notably, this would *always* occur when builtins.import was used. What's the solution? ==================== I have completely rewritten `Thunk::force_trampoline_self` to make all flows that can occur in it explicit. I have also removed the outer loop inside of that function, and resorted to more use of trampolining instead. The function is now well-commented and it should be possible to read it from top-to-bottom and get a general sense of what is going on, though the trampolining itself (which is implemented in the VM) needs to be at least partially understood for this. What's the new problem(s)? ========================== One new (known) problem is that we have to construct `Error` instances in all error types here, but we do not have spans available in some thunk-related situations. Due to b/238 we cannot ask the VM for an arbitrary span from the callsite leading to the force. This means that there are now code paths where, under certain conditions, causing an evaluation error during thunk forcing will panic. To fix this we will need to investigate and fix b/238, and/or add a span tracking mechanism to thunks themselves. What other impacts does this have? ================================== With this commit, eval of nixpkgs mostly succeeds (things like stdenv evaluate to the same hashes for us and C++ Nix, meaning we now construct identical derivations without eval breaking). Due to this we progress much further into nixpkgs, which lets us uncover more additional bugs. For example, after this commit we can quickly see that cl/7949 introduces some kind of behavioural issue and should not be merged as-is (this was not apparent before). Additionally, tvix-eval is now seemingly very fast. When doing performance analysis of a nixpkgs eval, we now mostly see the code path for shelling out to C++ Nix to add things to the store in there. We still need those code paths, so we can not (yet) do a performance analysis beyond that. Change-Id: I738525bad8bc5ede5d8c737f023b14b8f4160612 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8012 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-02-02 r/5823 fix(tvix/eval): unsafeDiscardStringContext is a no-opVincent Ambo1-4/+2
... not just a TODO. Most use-cases of unsafeDiscardStringContext are for cases where a string is processed in some ways and no longer contains a "physical" reference, but still has its context attached in C++ Nix. We don't need to do this. This does diverge in behaviour in use-cases related to build scheduling, but that whole behaviour will be different in Tvix. Change-Id: I4056d4c09f62d44d6bd52b791db03fe5556672b5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8016 Reviewed-by: flokli <flokli@flokli.de> Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-02-02 r/5822 refactor(tvix/eval): import_cache can be a HashMapVincent Ambo1-2/+2
... instead of a BTreeMap, as we do not need ordering guarantees here. HashMaps are noticeably faster here (especially as we've been sorting essentially random data!). Change-Id: Ie92d74286df9f763c04c9b226ef1066ee8484c13 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8014 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su>
2023-02-02 r/5821 chore(tvix/eval): elaborate on internal types in Value::type_ofVincent Ambo1-6/+8
This aids in debugging quite substantially. Change-Id: Ic43232aa6165ae1c3db7ac2701938e1dfeeb418c Reviewed-on: https://cl.tvl.fyi/c/depot/+/8013 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de> Autosubmit: tazjin <tazjin@tvl.su>
2023-01-31 r/5795 fix(tvix/eval): allow builtins.toXML to serialise any functionVincent Ambo1-1/+13
This adds a fake argument name to builtins.toXML which allows toXML to serialise any value instead of panicking on functions. We do still have to fix the value itself, eventually, though. Change-Id: I2e330ecddcd80442b4fac5eced64431ac86123ba Reviewed-on: https://cl.tvl.fyi/c/depot/+/7962 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-31 r/5784 test(tvix/eval): add tests for internal formals dependenciesVincent Ambo4-0/+8
Formals can depend on each other when using another formal as a default value. This test ensures that the compiler's declaration and initialisation order of formals is consistent with what actually happens in the VM. Change-Id: Ibdabe262554e8066d67fac1ebc3b5a48ef626e18 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7948 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-26 r/5763 chore(tvix/eval): remove dead commentVincent Ambo1-1/+1
Change-Id: Icedb7f272e5067569b8dbf1c2d8b0fdd352b8e12 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7936 Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de>
2023-01-25 r/5757 test(tvix/eval): add test for total_fmt_floatFlorian Klink1-0/+28
Change-Id: If6c478ee3d2e4ecf5ef92289614f86535ad05cb7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7927 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su> Autosubmit: flokli <flokli@flokli.de>
2023-01-25 r/5756 refactor(tvix/eval): extract float formatting into a helperVincent Ambo1-71/+75
This keeps the actual TotalDisplay implementation readable, as this float formatting code suddenly made up the majority of its implementation. Change-Id: I2c0d00e4a691e0b8ffbc72680f680e16feef4bee Reviewed-on: https://cl.tvl.fyi/c/depot/+/7925 Reviewed-by: flokli <flokli@flokli.de> Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-01-25 r/5754 feat(tvix/eval): implement builtins.fromTOMLFlorian Klink4-0/+22
This allows parsing TOML from Tvix. We can enable the eval-okay-fromTOML testcase from nix_tests. It uses the `toml` crate, and the serde integration it brings with it. Change-Id: Ic6f95aacf2aeb890116629b409752deac49dd655 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7920 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-01-25 r/5753 feat(tvix/eval): use lexical-core to format floatFlorian Klink3-4/+88
Apparently our naive implementation of float formatting, which simply used {:.5}, and trimmed trailing "0" strings not sufficient. It wrongly trimmed numbers with zeroes but no decimal point, like `10000` got trimmed to `1`. Nix uses `std::to_string` on the double, which according to https://en.cppreference.com/w/cpp/string/basic_string/to_string is equivalent to `std::sprintf(buf, "%f", value)`. https://en.cppreference.com/w/cpp/io/c/fprintf mentions this is treated like this: > Precision specifies the exact number of digits to appear after > the decimal point character. The default precision is 6. In the > alternative implementation decimal point character is written even if > no digits follow it. For infinity and not-a-number conversion style > see notes. This doesn't seem to be the case though, and Nix uses scientific notation in some cases. There's a whole bunch of strategies to determine which is a more compact notation, and which notation should be used for a given number. https://github.com/rust-lang/rust/issues/24556 provides some pointers into various rabbit holes for those interested. This gist seems to be that currently a different formatting is not exposed in rust directly, at least not for public consumption. There is the [lexical-core](https://github.com/Alexhuszagh/rust-lexical) crate though, which provides a way to format floats with various strategies and formats. Change our implementation of `TotalDisplay` for the `Value::Float` case to use that. We still need to do some post-processing, because Nix always adds the sign in scientific notation (and there's no way to configure lexical-core to do that), and lexical-core in some cases keeps the trailing zeros. Even with all that in place, there as a difference in `eval-okay- fromjson.nix` (from tvix-tests), which I couldn't get to work. I updated the fixture to a less problematic number. With this, the testsuite passes again, and does for the upcoming CL introducing builtins.fromTOML, and enabling the nix testsuite bits for it, too. Change-Id: Ie6fba5619e1d9fd7ce669a51594658b029057acc Reviewed-on: https://cl.tvl.fyi/c/depot/+/7922 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: tazjin <tazjin@tvl.su>
2023-01-23 r/5747 chore(tvix/eval): delete "useless parenthesis" warning/optimisationVincent Ambo2-30/+0
Two main reasons: 1. Traversing the structure to do this optimisation is actually *slower* than not optimising it. 2. There are literally hundreds of thousands of incidences of this in nixpkgs, and with some of the weird code there some of these (functionally) useless parens are actually required for readability reasons. Change-Id: I1044b1c5f9fe20df4b6085851fc3b191277c65dc Reviewed-on: https://cl.tvl.fyi/c/depot/+/7917 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-23 r/5746 fix(tvix/eval): force functors before applying themVincent Ambo3-0/+12
call_value in the VM expects the callable to be forced when calling it, which was not the case for functors. Change-Id: Id55a2fe32a9573be42aef8669e268df519a989cd Reviewed-on: https://cl.tvl.fyi/c/depot/+/7909 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2023-01-22 r/5735 feat(tvix/eval): support builtins implemented in Nix itselfVincent Ambo4-17/+108
This makes it possible to inject builtins into the builtin set that are written in Nix code, and which at runtime are represented by a thunk that will compile them the first time they are used. Change-Id: Ia632367328f66fb2f26cb64ae464f8f3dc9c6d30 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7891 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-22 r/5734 docs(tvix/eval): update some outdated commentsVincent Ambo1-8/+3
These don't apply anymore since the "antidote-CL". Change-Id: I40ee73ef43d44bbfc650a8fe6c2b33263dd06959 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7890 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-21 r/5721 refactor(tvix/eval): administer antidote for poisonAdam Joseph7-133/+47
The codebase contains a lot of complexity and odd roundabout handling for shadowing globals. I'm pretty sure none of this is necessary, and all of it disappears if you simply make the globals part of the ordinary identifier resolution chain, with their own scope up above the root scope. Then the ordinary shadowing routines do the right thing, and no special cases or new terminology are required. This commit does that. Note by tazjin: This commit was originally abandoned when Adam decided not to take away reviewer bandwidth for this at the time (eval was still in a much earlier stage). As we've recently done some significant refactoring of globals initialisation this came up again, and it seems we can easily cover the use-cases of the poison tracking in other ways now, so I've rebased, updated and resurrected the CL. Co-Authored-By: Vincent Ambo <tazjin@tvl.su> Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: Ib3309a47a7b31fa5bf10466bade0d876b76ae462 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7089 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-20 r/5715 refactor(tvix/eval): keep globals alive through VM structVincent Ambo4-10/+59
This forces users to pass the fully constructed set of globals to the VM, making it harder to accidentally "lose" the set while weak references to it still exist. This doesn't modify any functionality, but is laying the foundation for simplifying some of the builtins behaviour that has grown more complex again. Change-Id: I5120f97861c65dc46d90b8a4e2c92ad32cc53e03 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7877 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-20 r/5714 docs(tvix/eval): add doc comments to VM fieldsVincent Ambo1-0/+8
Change-Id: Ia4857c217de15aec8b61e1abd39e22c50e2d816a Reviewed-on: https://cl.tvl.fyi/c/depot/+/7876 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su>
2023-01-20 r/5707 refactor(tvix/eval): directly return builtin tuples from macroVincent Ambo3-21/+4
All invocations of the builtin macro had to previously filter through the `builtin_tuple` function, but it's more sensible to directly return these from the macro. Change-Id: I45600ba84d56c9528d3e92570461c319eea595ce Reviewed-on: https://cl.tvl.fyi/c/depot/+/7825 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-20 r/5706 feat(tvix/eval): add error contexts to annotate error kindsVincent Ambo5-34/+99
This makes it possible for users to add additional context to an error, which will then be rendered as an additional secondary span in the formatted error output. We should strive to do this basically anywhere errors are raised that can occur multiple times, *especially* during type casts. This was triggered by me debugging a type cast error attached to a fairly large-ish span (a builtin invocation). Change-Id: I51be41fabee00cf04de973935daf34fe6424e76f Reviewed-on: https://cl.tvl.fyi/c/depot/+/7849 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-17 r/5676 refactor(tvix/eval): non-hacky suspended native thunksVincent Ambo1-55/+35
Instead of having a representation of suspended native thunks that involves constructing a fake code chunk, make these thunks a first-class part of the internal thunk representation. The previous code was not that simple to understand, and actually contained a critical bug which could lead to Tvix crashes. This version fixes the particular instance of that bug, but instead uncovers another (b/238) which can still lead to Tvix crashes. Fixes: b/237. Change-Id: I771d03864084d63953bdbb518fec94487481f839 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7750 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-17 r/5675 refactor(tvix/eval): remove `Box` in new_suspended_nativeVincent Ambo3-7/+5
This is unnecessary, Rc already provides all the boxing we need. Change-Id: I08cf0939c48da43f04c847526c7e5dae5336d528 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7749 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2023-01-17 r/5674 feat(tvix/eval): add builtins to builtinsVincent Ambo3-2/+34
This is a somewhat terrifying hack that enables us to support `builtins.builtins`, by running a "fake compilation" inside of a suspended native thunk that can resolve the weak pointer to the globals. With this implementation, the thunk at `builtins.builtins` actually resolves to the "real" `builtins` (verified with a new test). This is kind of ugly, and it's something users shouldn't use, but bubbling a warning out of this is difficult at the moment due to a little bit of trickery with how the spans in suspended native thunks work (they don't) (see b/237, b/238) Change-Id: I67d0e93246dd5b279c960aeda00402031aa12af3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7748 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-17 r/5670 refactor(tvix/value): use proptest strategies from imbl crateVincent Ambo4-70/+39
Instead of going through Vec/BTreeMap for generating our internal types, use the proptest strategies from imbl. The one thing I couldn't figure out in the previous implementation is where the ranges/sizes of generated collections came from. The strategies in proptest use different types (Range, with an unknown default value, and SizeRange with 0..100). I've opted to specify 0..100 directly, but we can probably make it configurable. Change-Id: I749bc4c703fe424099240cab822b1642e5216361 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7791 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-16 r/5665 feat(tvix/eval): add error variant for threading through errorsVincent Ambo1-2/+17
This variant is required for external builtins (which in our case includes `derivation`) to thread through reasonable error messages. This has some potential for improvement, but it's an improvement over the status quo of panicking in the external builtins when no appropriate error is available. Change-Id: I7e4bdb0a156c7717092dde30aa4785192182dc66 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7841 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-16 r/5664 feat(tvix/eval): implement builtins.toXMLVincent Ambo7-0/+157
Change-Id: I009efc53a8e98f0650ae660c4decd8216e8a06e7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7835 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-16 r/5663 chore(tvix/eval): add other required items to public APIVincent Ambo2-3/+7
External implementors of builtins must be able to force values, which necessitates publishing a bunch more items from the crate. Change-Id: I8f6b8ae88156aae417dbe630a698d123d0c1c8d4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7830 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-12 r/5654 fix(tvix/eval): len_without_is_empty clippy warnAaqa Ishtyaq3-1/+13
This CL addresses clippy warning len_without_is_empty which expects `.is_empty()` method to be present when implementing `.len()` method for an item. Change-Id: I8878db630b9ef5853649a906b764a33299bb5dc8 Signed-off-by: Aaqa Ishtyaq <aaqaishtyaq@gmail.com> Reviewed-on: https://cl.tvl.fyi/c/depot/+/7806 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-12 r/5652 feat(tvix/eval): implement builtins.toJSONVincent Ambo11-10/+75
Implements `Serialize` for `tvix_eval::Value`. Special care is taken with serialisation of attribute sets, and forcing of thunks. The tests should cover both cases well. Change-Id: I9bb135bacf6f87bc6bd0bd88cef0a42308e6c335 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7803 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su>
2023-01-10 r/5642 fix(tvix/eval): address useless_format clippy warnAaqa Ishtyaq1-13/+6
This CL address clippy warnings related to use of 'format!' macro to return unmodified 'String'. Change-Id: I88726e59d8f39f6a455a8c1f48075b52d167e489 Signed-off-by: Aaqa Ishtyaq <aaqaishtyaq@gmail.com> Reviewed-on: https://cl.tvl.fyi/c/depot/+/7804 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-10 r/5640 feat(tvix/eval): implement serde::Deserialize for ValueRyan Lahfa7-47/+96
Co-Authored-By: Vincent Ambo <tazjin@tvl.su> Change-Id: Ib6f7d1f4f4faac36b44f5f75cccc57bf912cf606 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7626 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-01-10 r/5639 refactor(tvix/eval): impl Display for ErrorKindVincent Ambo1-2/+8
This just shuffles the Display implementations around so that ErrorKind itself is displayable, which is useful in some situations where errors under construction need to be type-converted. Change-Id: I7b633d03d0dc34f345c4f20676e0023ecb1db0c4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7802 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: edef <edef@edef.eu> Tested-by: BuildkiteCI
2023-01-08 r/5629 fix(tvix/eval): fix last uses of Vec<Value> -> NixList in builtinsVincent Ambo2-22/+21
Change-Id: I0d71b82eb7ddc1e457b0996b0668006f55f56751 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7790 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2023-01-07 r/5626 fix(tvix/eval): fix typo'd function name in testsVincent Ambo1-1/+1
Caught by sterni on cl/7783. Change-Id: I15d57b893ef22538fdd7e809f3b92861dd2bc1af Reviewed-on: https://cl.tvl.fyi/c/depot/+/7789 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-06 r/5620 refactor(tvix/eval): use builtins macro for placeholdersVincent Ambo1-67/+45
Change-Id: I30bc475e3e36a163fa169083481cdd4b4d0ca456 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7785 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su>
2023-01-06 r/5619 refactor(tvix/eval): move mocked builtins.derivation to testsVincent Ambo2-36/+38
This placeholder should not live in the main crate anymore as we will be injecting the real one from outside of eval, but there are still language tests that depend on a (simple, mockable) version of it. Change-Id: I68ea169db15cbdbeed320930d3069e21e376c90d Reviewed-on: https://cl.tvl.fyi/c/depot/+/7783 Reviewed-by: flokli <flokli@flokli.de> Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-01-06 r/5607 feat(tvix/eval): skip & warn for useless parenthesisVincent Ambo2-0/+32
Change-Id: I567ca0682012b9d09f1217e57a104ac5671f8d82 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7771 Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz> Reviewed-by: flokli <flokli@flokli.de>
2023-01-06 r/5606 feat(tvix/eval): warn on empty let-bindingsVincent Ambo2-1/+10
Change-Id: Ib6ef7ce514abbd3e372dfe9df7137aa36dbda9d4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7770 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-06 r/5605 refactor(tvix/eval): short-circuit on empty attrs in compilerVincent Ambo1-0/+9
This is marginally more efficient and has simpler bytecode. Change-Id: Iad37c9aeef24583e8f696911bcd83d43639f2e36 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7769 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-06 r/5604 feat(tvix/eval): warn about empty `inherit`sVincent Ambo2-0/+11
Change-Id: I82bec6fe2210bcb88c46fd2fdf3e26bd613d1c1f Reviewed-on: https://cl.tvl.fyi/c/depot/+/7768 Reviewed-by: flokli <flokli@flokli.de> Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI
2023-01-06 r/5603 fix(tvix/eval): compile but don't emit dead codeVincent Ambo2-9/+33
This adds a mechanism to the compiler to compile an expression without emitting any code. This allows for detected dead code to still be compiled to detect errors & warnings inside of it. Change-Id: Ie78479173570e9c819d8f32ae683ce34234a4c5d Reviewed-on: https://cl.tvl.fyi/c/depot/+/7767 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-06 r/5602 feat(tvix/eval): implement initial compiler::optimiser moduleVincent Ambo5-0/+165
This optimiser can rewrite some expressions into more efficient forms, and warn users about those cases. As a proof-of-concept, only some simple boolean comparisons are supported for now. Change-Id: I7df561118cfbad281fc99523e859bc66e7a1adcb Reviewed-on: https://cl.tvl.fyi/c/depot/+/7766 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-06 r/5601 refactor(tvix/eval): take owned ast::Expr in Compiler::compileVincent Ambo2-34/+34
This adds a very minimal amount of additional Rc-increments (~1 per compilation), but makes it a lot easier to add an AST-optimising compiler pass without incurring a lot of extra cost. Change-Id: I57208bdfc8882e3ae21c5850e14aa380d3ccea36 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7765 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-06 r/5599 feat(tvix/eval): add Evaluation::compile_only methodVincent Ambo2-47/+99
This would make it possible to implement something like a linter based on the tvix-eval compiler warnings. Change-Id: I1feb4e7c4a44be7d1204b0a962ab522fd32b93c6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7763 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-06 r/5598 fix(tvix/eval): don't increase `with_stack_size` in scope inheritsVincent Ambo1-1/+1
There was probably a misunderstanding somewhere about the with_stack_size being related to how far away it is from the with, but it is about whether there is a with at all. This broke a warning (`UselessInherit`), and may actually have let to more inefficient codegen in some cases. Change-Id: I08338ea59ae39dad01ca8a4e09d934a936cdea2f Reviewed-on: https://cl.tvl.fyi/c/depot/+/7762 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-06 r/5597 fix(tvix/eval): VM & Builtin* types have to be publicVincent Ambo1-9/+2
... without them, using the new Builtins API is basically impossible for library consumers. Change-Id: Ice0557a2e55e12d812f51bf5a99e6b8c91ad1b91 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7755 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-06 r/5595 feat(tvix/eval): add builtins.{null,true,false}sterni1-0/+3
Code probably rarely relies on these, but it's not hard to support them. Change-Id: I8499fec34efaf031f9c013bbd370a13db929a2a3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7772 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Autosubmit: sterni <sternenseemann@systemli.org>
generated by cgit-pink 1.4.1 (git 2.44.2) at 2024-12-24T07·50+0000