4d8316f4d4
Current `SwitchInt` handling has complicated control flow. - The dataflow engine calls `Analysis::apply_switch_int_edge_effects`, passing in an "applier" that impls `SwitchIntEdgeEffects`. - `apply_switch_int_edge_effects` possibly calls `apply` on the applier, passing it a closure. - The `apply` method calls the closure on each `SwitchInt` edge. - The closure operates on the edge. I.e. control flow goes from the engine, to the analysis, to the applier (which came from the engine), to the closure (which came from the analysis). It took me a while to work this out. This commit changes to a simpler structure that maintains the important characteristics. - The dataflow engine calls `Analysis::get_switch_int_data`. - `get_switch_int_data` returns an `Option<Self::SwitchIntData>` value. - If that returned value was `Some`, the dataflow engine calls `Analysis::apply_switch_int_edge_effect` on each edge, passing the `Self::SwitchIntData` value. - `Analysis::apply_switch_int_edge_effect` operates on the edge. I.e. control flow goes from the engine, to the analysis, to the engine, to the analysis. Added: - The `Analysis::SwitchIntData` assoc type and the `Analysis::get_switch_int_data` method. Both only need to be defined by analyses that look at `SwitchInt` terminators. - The `MaybePlacesSwitchIntData` struct, which has three fields. Changes: - `Analysis::apply_switch_int_edge_effects` becomes `Analysis::apply_switch_int_edge_effect`, which is a little simpler because it's dealing with a single edge instead of all edges. Removed: - The `SwitchIntEdgeEffects` trait, and its two impls: `BackwardSwitchIntEdgeEffectsApplier` (which has six fields) and `ForwardSwitchIntEdgeEffectsApplier` structs (which has four fields). - The closure. The new structure is more concise and simpler. |
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This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
Why Rust?
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Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.
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Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.
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Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).
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Read "Installation" from The Book.
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