BE-615: HashQL: Introduce the concept of synthetic closures in the MIR#8894
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PR SummaryMedium Risk Overview Administrative reduction gains Intrinsics move from Supporting changes: Note: Some postgres Reviewed by Cursor Bugbot for commit c836d70. Bugbot is set up for automated code reviews on this repo. Configure here. |
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## bm/be-607-hashql-remove-smallvec-from-the-standardlibrary-for-module #8894 +/- ##
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+ Coverage 24.83% 40.65% +15.81%
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Files 663 791 +128
Lines 50118 70641 +20523
Branches 3379 3992 +613
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+ Hits 12448 28719 +16271
- Misses 37513 41590 +4077
- Partials 157 332 +175
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| // In this case it may either be a forwarding closure **or** a synthetic closure, this | ||
| // depends on the final statement, in either case the last statement must be an assignment. | ||
| let StatementKind::Assign(Assign { lhs, ref rhs }) = final_stmt.kind else { | ||
| return None; | ||
| }; | ||
|
|
||
| // The kind depends on the final statement. Both cases are beta-reduction | ||
| // (substituting arguments into a function body at a call site): | ||
| // | ||
| // Apply: the body forwards to another call. The wrapper (lambda x. f(x)) is an | ||
| // eta-expansion of the inner function; inlining at the call site is beta-reduction | ||
| // that exposes the inner call directly. | ||
| // | ||
| // Binary, Unary, and other primitive operations: the body computes a single result | ||
| // from its arguments. Inlining substitutes the arguments and exposes the primitive | ||
| // operation. A subsequent constant folding pass may then perform delta-reduction | ||
| // (evaluating the primitive when operands are known). | ||
| let kind = match rhs { | ||
| RValue::Apply(_) => Self::ForwardingClosure, | ||
| RValue::Aggregate(_) | ||
| | RValue::Binary(_) | ||
| | RValue::Unary(_) | ||
| | RValue::Input(_) | ||
| | RValue::Load(_) => Self::TrivialClosure, | ||
| }; |
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| if bb.terminator.kind | ||
| == TerminatorKind::Return(Return { | ||
| value: Operand::Place(lhs), | ||
| }) | ||
| { |
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| // `property<T>(entity: Entity<T>, path: JsonPath) -> ?` | ||
| // TODO(BE-62): return `Option<?>` once pattern matching allows for option destructuring, to | ||
| // allow for proper comparison | ||
| let decl = decl!(context; | ||
| <T>(entity: context.ty.apply([(entity_ty.arguments[0].id, T)], entity_ty.id), | ||
| path: json_path_ty.id | ||
| ) -> option(&context.ty, context.ty.unknown()) | ||
| ) -> context.ty.unknown() | ||
| ); |
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| impl DefId { | ||
| /// Built-in dictionary insert operation (immutable). | ||
| /// | ||
| /// This operation inserts a key-value pair into a dictionary, | ||
| /// returning a new dictionary with the added pair. The original | ||
| /// dictionary remains unchanged. | ||
| pub const DICT_INSERT: Self = Self::new(0xFFFF_FE00); | ||
| /// Built-in dictionary insert operation (mutable). | ||
| /// | ||
| /// This operation inserts a key-value pair into a dictionary in-place, | ||
| /// modifying the original dictionary. Used for efficient dictionary | ||
| /// construction and updates. | ||
| pub const DICT_INSERT_MUT: Self = Self::new(0xFFFF_FE01); | ||
| /// Built-in dictionary remove operation (immutable). | ||
| /// | ||
| /// This operation removes a key-value pair from a dictionary, | ||
| /// returning a new dictionary without the specified key. The | ||
| /// original dictionary remains unchanged. | ||
| pub const DICT_REMOVE: Self = Self::new(0xFFFF_FE02); | ||
| /// Built-in dictionary remove operation (mutable). | ||
| /// | ||
| /// This operation removes a key-value pair from a dictionary in-place, | ||
| /// modifying the original dictionary and returning the removed value | ||
| /// if the key existed. | ||
| pub const DICT_REMOVE_MUT: Self = Self::new(0xFFFF_FE03); | ||
| /// Built-in list pop operation (immutable). | ||
| /// | ||
| /// This operation removes the last element from a list, returning | ||
| /// both the element and a new list without the element. The original | ||
| /// list remains unchanged. | ||
| pub const LIST_POP: Self = Self::new(0xFFFF_FE04); | ||
| /// Built-in list pop operation (mutable). | ||
| /// | ||
| /// This operation removes the last element from a list in-place, | ||
| /// returning the removed element while modifying the original list. | ||
| pub const LIST_POP_MUT: Self = Self::new(0xFFFF_FE05); | ||
| /// Built-in list push operation (immutable). | ||
| /// | ||
| /// This operation appends an element to a list, returning a new list | ||
| /// without modifying the original. Used for functional-style list | ||
| /// manipulation where immutability is preferred. | ||
| pub const LIST_PUSH: Self = Self::new(0xFFFF_FE06); | ||
| /// Built-in list push operation (mutable). | ||
| /// | ||
| /// This operation appends an element to a list in-place, modifying | ||
| /// the original list. Used for imperative-style list manipulation | ||
| /// where performance is critical. | ||
| pub const LIST_PUSH_MUT: Self = Self::new(0xFFFF_FE07); | ||
| pub const PLACEHOLDER: Self = Self::MAX; | ||
| } |
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| let inline = match body.source { | ||
| Source::Ctor(_) => InlineDirective::Always, | ||
| Source::Ctor(_) | Source::Synthetic(_) => InlineDirective::Always, | ||
| Source::Closure(_, _) | Source::Thunk(_, _) => InlineDirective::Heuristic, | ||
| Source::Intrinsic(_) | Source::GraphReadFilter(_) => InlineDirective::Never, | ||
| }; |
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| pub(in crate::module::std_lib) mod bits; | ||
| pub(in crate::module::std_lib) mod bool; | ||
| pub(in crate::module::std_lib) mod cmp; | ||
| pub(in crate::module::std_lib) mod json; | ||
| pub mod json; | ||
| pub(in crate::module::std_lib) mod math; | ||
| pub mod option; | ||
| pub(in crate::module::std_lib) mod result; |
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| // `property<T>(entity: Entity<T>, path: JsonPath) -> ?` | ||
| // TODO(BE-62): return `Option<?>` once pattern matching allows for option destructuring, to | ||
| // allow for proper comparison | ||
| let decl = decl!(context; | ||
| <T>(entity: context.ty.apply([(entity_ty.arguments[0].id, T)], entity_ty.id), | ||
| path: json_path_ty.id | ||
| ) -> option(&context.ty, context.ty.unknown()) | ||
| ) -> context.ty.unknown() | ||
| ); |
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| // In this case it may either be a forwarding closure **or** a synthetic closure, this | ||
| // depends on the final statement, in either case the last statement must be an assignment. |
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| (@source intrinsic) => { | ||
| $crate::body::Source::Intrinsic($crate::def::DefId::PLACEHOLDER) | ||
| $crate::body::Source::Intrinsic($crate::intrinsic::Intrinsic { id: $crate::intrinsic::IntrinsicId::EntityPropertyAccess, optimize: true }) | ||
| }; |
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| // In this case it may either be a forwarding closure **or** a synthetic closure, this | ||
| // depends on the final statement, in either case the last statement must be an assignment. | ||
| let StatementKind::Assign(Assign { lhs, ref rhs }) = final_stmt.kind else { | ||
| return None; | ||
| }; |
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| Source::Intrinsic(Intrinsic { id, .. }) => { | ||
| write!(self.line_buffer, "{{intrinsic#{id}}}") | ||
| } |
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| impl DefId { | ||
| /// Built-in dictionary insert operation (immutable). | ||
| /// | ||
| /// This operation inserts a key-value pair into a dictionary, | ||
| /// returning a new dictionary with the added pair. The original | ||
| /// dictionary remains unchanged. | ||
| pub const DICT_INSERT: Self = Self::new(0xFFFF_FE00); | ||
| /// Built-in dictionary insert operation (mutable). | ||
| /// | ||
| /// This operation inserts a key-value pair into a dictionary in-place, | ||
| /// modifying the original dictionary. Used for efficient dictionary | ||
| /// construction and updates. | ||
| pub const DICT_INSERT_MUT: Self = Self::new(0xFFFF_FE01); | ||
| /// Built-in dictionary remove operation (immutable). | ||
| /// | ||
| /// This operation removes a key-value pair from a dictionary, | ||
| /// returning a new dictionary without the specified key. The | ||
| /// original dictionary remains unchanged. | ||
| pub const DICT_REMOVE: Self = Self::new(0xFFFF_FE02); | ||
| /// Built-in dictionary remove operation (mutable). | ||
| /// | ||
| /// This operation removes a key-value pair from a dictionary in-place, | ||
| /// modifying the original dictionary and returning the removed value | ||
| /// if the key existed. | ||
| pub const DICT_REMOVE_MUT: Self = Self::new(0xFFFF_FE03); | ||
| /// Built-in list pop operation (immutable). | ||
| /// | ||
| /// This operation removes the last element from a list, returning | ||
| /// both the element and a new list without the element. The original | ||
| /// list remains unchanged. | ||
| pub const LIST_POP: Self = Self::new(0xFFFF_FE04); | ||
| /// Built-in list pop operation (mutable). | ||
| /// | ||
| /// This operation removes the last element from a list in-place, | ||
| /// returning the removed element while modifying the original list. | ||
| pub const LIST_POP_MUT: Self = Self::new(0xFFFF_FE05); | ||
| /// Built-in list push operation (immutable). | ||
| /// | ||
| /// This operation appends an element to a list, returning a new list | ||
| /// without modifying the original. Used for functional-style list | ||
| /// manipulation where immutability is preferred. | ||
| pub const LIST_PUSH: Self = Self::new(0xFFFF_FE06); | ||
| /// Built-in list push operation (mutable). | ||
| /// | ||
| /// This operation appends an element to a list in-place, modifying | ||
| /// the original list. Used for imperative-style list manipulation | ||
| /// where performance is critical. | ||
| pub const LIST_PUSH_MUT: Self = Self::new(0xFFFF_FE07); | ||
| pub const PLACEHOLDER: Self = Self::MAX; | ||
| } |
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Reviewed by Cursor Bugbot for commit 3c04155. Configure here.
| FROM "entity_editions" AS "ee" | ||
| WHERE "ee"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id") AS "entity_editions_0_0_1" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::boolean), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" | ||
| >>>>>>> d821432937 (feat: add to different passes) |
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Two postgres compiletest expected-output files still contain unresolved merge conflict markers (<<<<<<< HEAD, =======, >>>>>>> …). Snapshot or stdout comparison tests will fail until one side of each conflict is chosen and the markers are removed.
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Reviewed by Cursor Bugbot for commit 3c04155. Configure here.
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| SELECT ("continuation_0_0"."row")."block" AS "continuation_0_0_block", ("continuation_0_0"."row")."locals" AS "continuation_0_0_locals", ("continuation_0_0"."row")."values" AS "continuation_0_0_values", ("continuation_1_0"."row")."block" AS "continuation_1_0_block", ("continuation_1_0"."row")."locals" AS "continuation_1_0_locals", ("continuation_1_0"."row")."values" AS "continuation_1_0_values" | ||
| FROM "entity_temporal_metadata" AS "entity_temporal_metadata_0_0_0" | ||
| <<<<<<< HEAD |
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| SELECT ("continuation_1_0"."row")."block" AS "continuation_1_0_block", ("continuation_1_0"."row")."locals" AS "continuation_1_0_locals", ("continuation_1_0"."row")."values" AS "continuation_1_0_values" | ||
| FROM "entity_temporal_metadata" AS "entity_temporal_metadata_0_0_0" | ||
| <<<<<<< HEAD |
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| <<<<<<< HEAD | ||
| INNER JOIN "entity_editions" AS "entity_editions_0_0_1" | ||
| ON "entity_editions_0_0_1"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::bool), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_0_0" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((to_jsonb("entity_temporal_metadata_0_0_0"."entity_uuid") = to_jsonb(($3::jsonb)))::bool), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" | ||
| ======= | ||
| CROSS JOIN LATERAL (SELECT "ee"."entity_edition_id" AS "entity_edition_id", "ee"."properties" AS "properties", "ee"."archived" AS "archived", "ee"."confidence" AS "confidence", "ee"."provenance" AS "provenance", "ee"."property_metadata" AS "property_metadata" | ||
| FROM "entity_editions" AS "ee" | ||
| WHERE "ee"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id") AS "entity_editions_0_0_1" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::boolean), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_0_0" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((to_jsonb("entity_temporal_metadata_0_0_0"."entity_uuid") = to_jsonb(($3::jsonb)))::boolean), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" | ||
| >>>>>>> d821432937 (feat: add to different passes) |
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| <<<<<<< HEAD | ||
| INNER JOIN "entity_editions" AS "entity_editions_0_0_1" | ||
| ON "entity_editions_0_0_1"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::bool), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" | ||
| ======= | ||
| CROSS JOIN LATERAL (SELECT "ee"."entity_edition_id" AS "entity_edition_id", "ee"."properties" AS "properties", "ee"."archived" AS "archived", "ee"."confidence" AS "confidence", "ee"."provenance" AS "provenance", "ee"."property_metadata" AS "property_metadata" | ||
| FROM "entity_editions" AS "ee" | ||
| WHERE "ee"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id") AS "entity_editions_0_0_1" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::boolean), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" | ||
| >>>>>>> d821432937 (feat: add to different passes) |
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| impl DefId { | ||
| /// Built-in dictionary insert operation (immutable). | ||
| /// | ||
| /// This operation inserts a key-value pair into a dictionary, | ||
| /// returning a new dictionary with the added pair. The original | ||
| /// dictionary remains unchanged. | ||
| pub const DICT_INSERT: Self = Self::new(0xFFFF_FE00); | ||
| /// Built-in dictionary insert operation (mutable). | ||
| /// | ||
| /// This operation inserts a key-value pair into a dictionary in-place, | ||
| /// modifying the original dictionary. Used for efficient dictionary | ||
| /// construction and updates. | ||
| pub const DICT_INSERT_MUT: Self = Self::new(0xFFFF_FE01); | ||
| /// Built-in dictionary remove operation (immutable). | ||
| /// | ||
| /// This operation removes a key-value pair from a dictionary, | ||
| /// returning a new dictionary without the specified key. The | ||
| /// original dictionary remains unchanged. | ||
| pub const DICT_REMOVE: Self = Self::new(0xFFFF_FE02); | ||
| /// Built-in dictionary remove operation (mutable). | ||
| /// | ||
| /// This operation removes a key-value pair from a dictionary in-place, | ||
| /// modifying the original dictionary and returning the removed value | ||
| /// if the key existed. | ||
| pub const DICT_REMOVE_MUT: Self = Self::new(0xFFFF_FE03); | ||
| /// Built-in list pop operation (immutable). | ||
| /// | ||
| /// This operation removes the last element from a list, returning | ||
| /// both the element and a new list without the element. The original | ||
| /// list remains unchanged. | ||
| pub const LIST_POP: Self = Self::new(0xFFFF_FE04); | ||
| /// Built-in list pop operation (mutable). | ||
| /// | ||
| /// This operation removes the last element from a list in-place, | ||
| /// returning the removed element while modifying the original list. | ||
| pub const LIST_POP_MUT: Self = Self::new(0xFFFF_FE05); | ||
| /// Built-in list push operation (immutable). | ||
| /// | ||
| /// This operation appends an element to a list, returning a new list | ||
| /// without modifying the original. Used for functional-style list | ||
| /// manipulation where immutability is preferred. | ||
| pub const LIST_PUSH: Self = Self::new(0xFFFF_FE06); | ||
| /// Built-in list push operation (mutable). | ||
| /// | ||
| /// This operation appends an element to a list in-place, modifying | ||
| /// the original list. Used for imperative-style list manipulation | ||
| /// where performance is critical. | ||
| pub const LIST_PUSH_MUT: Self = Self::new(0xFFFF_FE07); | ||
| pub const PLACEHOLDER: Self = Self::MAX; | ||
| } |
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| <<<<<<< HEAD | ||
| INNER JOIN "entity_editions" AS "entity_editions_0_0_1" | ||
| ON "entity_editions_0_0_1"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::bool), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_0_0" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((to_jsonb("entity_temporal_metadata_0_0_0"."entity_uuid") = to_jsonb(($3::jsonb)))::bool), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" |
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| <<<<<<< HEAD | ||
| INNER JOIN "entity_editions" AS "entity_editions_0_0_1" | ||
| ON "entity_editions_0_0_1"."entity_edition_id" = "entity_temporal_metadata_0_0_0"."entity_edition_id" | ||
| CROSS JOIN LATERAL (SELECT (ROW(COALESCE(((NOT("entity_editions_0_0_1"."archived"))::bool), FALSE), NULL, NULL, NULL)::continuation) AS "row") AS "continuation_1_0" | ||
| ======= |
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| // In this case it may either be a forwarding closure **or** a synthetic closure, this | ||
| // depends on the final statement, in either case the last statement must be an assignment. | ||
| let StatementKind::Assign(Assign { lhs, ref rhs }) = final_stmt.kind else { |
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🌟 What is the purpose of this PR?
Introduces
Source::Syntheticfor compiler-generated wrapper bodies and extends administrative reduction to handle single-operation function bodies (TrivialClosure).This is groundwork for making intrinsics usable in value position (e.g. passing
+as an argument to a higher-order function). TheSyntheticsource variant will identify wrapper bodies that bridge non-first-class operations into callable closures, andTrivialClosureensures they are always inlined away.🔍 What does this change?
Source::Synthetic(Symbol)to the MIRSourceenum for compiler-synthesized operation wrappersReductionKind::TrivialClosureto administrative reduction, recognizing single-basic-block bodies where a trivial prelude leads to a single non-call operation (Binary,Unary,Aggregate,Input,Load) whose result is returnedSyntheticbodies getInlineDirective::Always(same asCtor)Sourcematches updated: execution pipeline, statement placement, eval context, pretty printer[synthetic sym::path]source to thebody!test macroThe
TrivialClosureclassification is intentionally broader than just synthetic bodies. Any function matching the shape is reducible, which unlocks optimization cascades: single-operation closures get inlined, exposing constant-foldable expressions, enabling branch elimination downstream.Pre-Merge Checklist 🚀
🚢 Has this modified a publishable library?
This PR:
📜 Does this require a change to the docs?
The changes in this PR:
🕸️ Does this require a change to the Turbo Graph?
The changes in this PR:
🐾 Next steps
qualified_pathin reification to generate synthetic wrapper bodies for intrinsics in value position🛡 What tests cover this?
classify_trivial_closure_binary,classify_trivial_closure_unary,classify_non_reducible_non_trivial_preludeinline_trivial_closure_binary,inline_trivial_closure_transitivenested-branch-eliminationnow demonstrates the full optimization cascade)❓ How to test this?
cargo test --package hashql-mir --lib -- administrative_reduction::tests📹 Demo
The
nested-branch-eliminationcompiletest shows the cascade effect: closures containing single comparisons (> 100,< 0) are now inlined by AR, exposing constant-foldable comparisons (50 > 100,50 < 0), which enables the entire branch structure to collapse toreturn "in range".