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feat: remove truncations which can be seen to be noops using type information #3953
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Changes to circuit sizes
🧾 Summary (10% most significant diffs)
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Looks good. Should we have a test for this optimization though? I noticed none of our tests were affected by this at all.
Yep, I should add some tests for this as there's scope for off-by-one errors. Will do that before we merge this. |
I've added a test showing the two relevant edgecases. There's a good deal of code duplication between them but there doesn't seem to be a nice way to encapsulate the building of the SSA while still having the access to variables needed for the test. We could in future move these tests to sit in |
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Thanks!
* master: chore(ci): disable commit comments on docs publishing (#3998) feat: simplify chains of casts to be all in terms of the original `ValueId` (#3984) chore: quiet down aztec-bot! (#4006) chore: force public functions for trait implementation (#3986) feat: docker testing flow (#3895) feat: decompose `Instruction::Constrain` into multiple more basic constraints (#3892) feat: remove truncation from brillig casts (#3997) chore: add test case showing reexports (#4001) feat: remove truncations which can be seen to be noops using type information (#3953) chore: remove homemade keccakf1600 implementation (#3996)
* master: (285 commits) feat: Add `assert_max_bit_size` method to `Field` (#4016) fix: fixup exports from `noir_wasm` (#4022) chore(ci): fix docker CI (#4014) feat(lsp): goto trait method declaration (#3991) chore: add action to check for dead links (#3992) chore: improve cspell setup (#3985) feat: Add dependency resolver for `noir_wasm` and implement `FileManager` for consistency with native interface (#3891) chore(docs): devcontainer docs (#4007) chore(ci): disable commit comments on docs publishing (#3998) feat: simplify chains of casts to be all in terms of the original `ValueId` (#3984) chore: quiet down aztec-bot! (#4006) chore: force public functions for trait implementation (#3986) feat: docker testing flow (#3895) feat: decompose `Instruction::Constrain` into multiple more basic constraints (#3892) feat: remove truncation from brillig casts (#3997) chore: add test case showing reexports (#4001) feat: remove truncations which can be seen to be noops using type information (#3953) chore: remove homemade keccakf1600 implementation (#3996) feat!: Breaking changes from aztec-packages (#3955) chore(docs): small grammar fix on the landing page (#3989) ...
🤖 I have created a release *beep* *boop* --- <details><summary>0.23.0</summary> ## [0.23.0](v0.22.0...v0.23.0) (2024-01-22) ### ⚠ BREAKING CHANGES * Ban nested slices ([#4018](#4018)) * Breaking changes from aztec-packages ([#3955](#3955)) * Rename Arithmetic opcode to AssertZero ([#3840](#3840)) * remove circuit methods from noir_wasm ([#3869](#3869)) ### Features * Add `assert_max_bit_size` method to `Field` ([#4016](#4016)) ([bc9a44f](bc9a44f)) * Add `noir-compiler` checks to `aztec_macros` ([#4031](#4031)) ([420a5c7](420a5c7)) * Add a `--force` flag to force a full recompile ([#4054](#4054)) ([27a8e68](27a8e68)) * Add dependency resolver for `noir_wasm` and implement `FileManager` for consistency with native interface ([#3891](#3891)) ([c29c7d7](c29c7d7)) * Add foreign call support to `noir_codegen` functions ([#3933](#3933)) ([e5e52a8](e5e52a8)) * Add MVP `nargo export` command ([#3870](#3870)) ([fbb51ed](fbb51ed)) * Add support for codegenning multiple functions which use the same structs in their interface ([#3868](#3868)) ([1dcfcc5](1dcfcc5)) * Added efficient field comparisons for bn254 ([#4042](#4042)) ([1f9cad0](1f9cad0)) * Assert maximum bit size when creating a U128 from an integer ([#4024](#4024)) ([8f9c7e4](8f9c7e4)) * Avoid unnecessary range checks by inspecting instructions for casts ([#4039](#4039)) ([378c18e](378c18e)) * Breaking changes from aztec-packages ([#3955](#3955)) ([5be049e](5be049e)) * Bubble up `Instruction::Constrain`s to be applied as early as possible. ([#4065](#4065)) ([66f5cdd](66f5cdd)) * Cached LSP parsing ([#4083](#4083)) ([b4f724e](b4f724e)) * Comparison for signed integers ([#3873](#3873)) ([bcbd49b](bcbd49b)) * Decompose `Instruction::Cast` to have an explicit truncation instruction ([#3946](#3946)) ([35f18ef](35f18ef)) * Decompose `Instruction::Constrain` into multiple more basic constraints ([#3892](#3892)) ([51cf9d3](51cf9d3)) * Docker testing flow ([#3895](#3895)) ([179c90d](179c90d)) * Extract parsing to its own pass and do it in parallel ([#4063](#4063)) ([569cbbc](569cbbc)) * Implement `Eq` trait on curve points ([#3944](#3944)) ([abf751a](abf751a)) * Implement DAP protocol in Nargo ([#3627](#3627)) ([13834d4](13834d4)) * Implement generic traits ([#4000](#4000)) ([916fd15](916fd15)) * Implement Operator Overloading ([#3931](#3931)) ([4b16090](4b16090)) * **lsp:** Cache definitions for goto requests ([#3930](#3930)) ([4a2140f](4a2140f)) * **lsp:** Goto global ([#4043](#4043)) ([15237b3](15237b3)) * **lsp:** Goto struct member inside Impl method ([#3918](#3918)) ([99c2c5a](99c2c5a)) * **lsp:** Goto trait from trait impl ([#3956](#3956)) ([eb566e2](eb566e2)) * **lsp:** Goto trait method declaration ([#3991](#3991)) ([eb79166](eb79166)) * **lsp:** Goto type alias ([#4061](#4061)) ([dc83385](dc83385)) * **lsp:** Goto type definition ([#4029](#4029)) ([8bb4ddf](8bb4ddf)) * **lsp:** Re-add code lens feature with improved performance ([#3829](#3829)) ([8f5cd6c](8f5cd6c)) * Optimize array ops for arrays of structs ([#4027](#4027)) ([c9ec0d8](c9ec0d8)) * Optimize logic gate ACIR-gen ([#3897](#3897)) ([926460a](926460a)) * Prefer `AcirContext`-native methods for performing logic operations ([#3898](#3898)) ([0ec39b8](0ec39b8)) * Remove range constraints from witnesses which are constrained to be constants ([#3928](#3928)) ([afe9c7a](afe9c7a)) * Remove truncation from brillig casts ([#3997](#3997)) ([857ff97](857ff97)) * Remove truncations which can be seen to be noops using type information ([#3953](#3953)) ([cc3c2c2](cc3c2c2)) * Remove unnecessary predicate from `Lt` instruction ([#3922](#3922)) ([a63433f](a63433f)) * Simplify chains of casts to be all in terms of the original `ValueId` ([#3984](#3984)) ([2384d3e](2384d3e)) * Simplify multiplications by `0` or `1` in ACIR gen ([#3924](#3924)) ([e58844d](e58844d)) * Support for u128 ([#3913](#3913)) ([b4911dc](b4911dc)) * Support printing more types ([#4071](#4071)) ([f5c4632](f5c4632)) * Sync `aztec-packages` ([#4011](#4011)) ([fee2452](fee2452)) * Sync commits from `aztec-packages` ([#4068](#4068)) ([7a8f3a3](7a8f3a3)) * Use singleton `WasmBlackBoxFunctionSolver` in `noir_js` ([#3966](#3966)) ([10b28de](10b28de)) ### Bug Fixes * Acir gen doesn't panic on unsupported BB function ([#3866](#3866)) ([34fd978](34fd978)) * Allow abi encoding arrays of structs from JS ([#3867](#3867)) ([9b713f8](9b713f8)) * Allow abi encoding tuples from JS ([#3894](#3894)) ([f7fa181](f7fa181)) * Allow ast when macro errors ([#4005](#4005)) ([efccec3](efccec3)) * Allow lsp to run inside of a docker container ([#3876](#3876)) ([2529977](2529977)) * Bit-shifts for signed integers ([#3890](#3890)) ([6ddd98a](6ddd98a)) * Checks for cyclic dependencies ([#3699](#3699)) ([642011a](642011a)) * **debugger:** Crash when stepping through locations spanning multiple lines ([#3920](#3920)) ([223e860](223e860)) * Don't fail if no tests and the user didn't provide a pattern ([#3864](#3864)) ([decbd0f](decbd0f)) * Fix advisory issue in cargo-deny ([#4077](#4077)) ([19baea0](19baea0)) * Fixing dark mode background on the CTA button ([#3882](#3882)) ([57eae42](57eae42)) * Fixup exports from `noir_wasm` ([#4022](#4022)) ([358cdd2](358cdd2)) * Handle multiple imports in the same file ([#3903](#3903)) ([219423e](219423e)) * Hoist constraints on inputs to top of program ([#4076](#4076)) ([447aa34](447aa34)) * Implement missing codegen for `BlackBoxFunc::EcdsaSecp256r1` in brillig ([#3943](#3943)) ([2c5eceb](2c5eceb)) * Improve `nargo test` output ([#3973](#3973)) ([3ab5ff4](3ab5ff4)) * Make `constant_to_radix` emit a slice instead of an array ([#4049](#4049)) ([5cdb1d0](5cdb1d0)) * Operator overloading & static trait method references resolving to generic impls ([#3967](#3967)) ([f1de8fa](f1de8fa)) * Preserve brillig entrypoint functions without arguments ([#3951](#3951)) ([1111465](1111465)) * Prevent `Instruction::Constrain`s for non-primitive types ([#3916](#3916)) ([467948f](467948f)) * Remove panic for adding an invalid crate name in wasm compiler ([#3977](#3977)) ([7a1baa5](7a1baa5)) * Return error rather instead of panicking on invalid circuit ([#3976](#3976)) ([67201bf](67201bf)) * Search all levels of struct nesting before codegenning primitive types ([#3970](#3970)) ([13ae014](13ae014)) * Update generics docs to mention we have traits now ([#3980](#3980)) ([c2acdf1](c2acdf1)) ### Miscellaneous Chores * Ban nested slices ([#4018](#4018)) ([f8a1fb7](f8a1fb7)) * Remove circuit methods from noir_wasm ([#3869](#3869)) ([12d884e](12d884e)) * Rename Arithmetic opcode to AssertZero ([#3840](#3840)) ([836f171](836f171)) </details> <details><summary>0.39.0</summary> ## [0.39.0](v0.38.0...v0.39.0) (2024-01-22) ### ⚠ BREAKING CHANGES * Breaking changes from aztec-packages ([#3955](#3955)) * Rename Arithmetic opcode to AssertZero ([#3840](#3840)) * Remove unused methods on ACIR opcodes ([#3841](#3841)) * Remove partial backend feature ([#3805](#3805)) ### Features * Aztec-packages ([#3754](#3754)) ([c043265](c043265)) * Breaking changes from aztec-packages ([#3955](#3955)) ([5be049e](5be049e)) * Remove range constraints from witnesses which are constrained to be constants ([#3928](#3928)) ([afe9c7a](afe9c7a)) * Speed up transformation of debug messages ([#3815](#3815)) ([2a8af1e](2a8af1e)) * Sync `aztec-packages` ([#4011](#4011)) ([fee2452](fee2452)) * Sync commits from `aztec-packages` ([#4068](#4068)) ([7a8f3a3](7a8f3a3)) ### Bug Fixes * Deserialize odd length hex literals ([#3747](#3747)) ([4000fb2](4000fb2)) * Return error rather instead of panicking on invalid circuit ([#3976](#3976)) ([67201bf](67201bf)) ### Miscellaneous Chores * Remove partial backend feature ([#3805](#3805)) ([0383100](0383100)) * Remove unused methods on ACIR opcodes ([#3841](#3841)) ([9e5d0e8](9e5d0e8)) * Rename Arithmetic opcode to AssertZero ([#3840](#3840)) ([836f171](836f171)) </details> --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). --------- Co-authored-by: TomAFrench <[email protected]>
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Description
Problem*
Resolves
Summary*
Truncate
s which occur on outputs ofBinary(BinaryOp::Div)
can sometimes be determined to be noops based on type information.Put simply, if we have
(numerator / constant_denom) as T
then iftype_of(numerator)::max / constant_denom
fits insideT
then we don't need to truncate the value.Additional Context
Testing this on noir-rsa takes us from
to
Documentation*
Check one:
PR Checklist*
cargo fmt
on default settings.