# dmohanty640/gcc architecture

> Architecture diagram of the GitHub repository dmohanty640/gcc, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-27). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/dmohanty640/gcc
- Repository: https://github.com/dmohanty640/gcc

## Overview

GCC is a multi-language compiler collection: users provide source and compilation options, and language front ends translate programs into GCC’s intermediate representation for shared optimization and target-specific code generation. The repository also contains an optional static analyzer and several language-specific front ends and target back ends. The README identifies GCC and points to usage and porting manuals; the tree supports the component paths below, while sampled source is limited, so links for unsampled compiler stages reflect the documented compiler workflow rather than inspected call sites.

Main entry points: [`gcc/cfg.cc`](https://github.com/dmohanty640/gcc/blob/master/gcc/cfg.cc) (GIMPLE and CFG), [`gcc`](https://github.com/dmohanty640/gcc/tree/master/gcc) (Optimization passes), [`gcc/analyzer/engine.cc`](https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/engine.cc) (Analysis engine), [`gcc/config`](https://github.com/dmohanty640/gcc/tree/master/gcc/config) (Target backend)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_frontends["Language front ends"]
  node_c_frontend["C parser<br/>[c-parser.cc]"]
  node_c_semantics["C semantics<br/>[c-typeck.cc]"]
  node_rust_frontend["Rust session"]
  node_ada_frontend["Ada front end"]
  node_algol68_frontend["Algol 68 front end"]
  node_cobol_frontend["COBOL front end"]
  node_m2_frontend["Modula-2 front end"]
end

subgraph group_core["Compiler core"]
  node_ir["GIMPLE and CFG<br/>[cfg.cc]"]
  node_optimization["Optimization passes"]
  node_diagnostics["Compiler diagnostics"]
end

subgraph group_analysis["Program analysis"]
  node_analyzer_entry["Analyzer pass<br/>[analyzer-pass.cc]"]
  node_analyzer_engine["Analysis engine<br/>[engine.cc]"]
  node_analyzer_model["Program state model<br/>[region-model.cc]"]
end

subgraph group_targets["Target code generation"]
  node_target_backend["Target backend"]
  node_nds32_sched["NDS32 scheduling"]
end

node_developer(("Compiler user"))
node_source["Source files"]
node_object["Object code"]
node_linker["Linker"]
node_executable["Executable"]

node_developer -->|"provides"| node_source
node_source -->|"parses"| node_c_frontend
node_source -->|"parses"| node_rust_frontend
node_source -->|"parses"| node_ada_frontend
node_source -->|"parses"| node_algol68_frontend
node_source -->|"parses"| node_cobol_frontend
node_source -->|"parses"| node_m2_frontend
node_c_frontend -->|"checks"| node_c_semantics
node_c_semantics -->|"lowers"| node_ir
node_rust_frontend -->|"lowers"| node_ir
node_ada_frontend -->|"lowers"| node_ir
node_algol68_frontend -->|"lowers"| node_ir
node_cobol_frontend -->|"lowers"| node_ir
node_m2_frontend -->|"lowers"| node_ir
node_ir -->|"optimizes"| node_optimization
node_optimization -->|"feeds"| node_target_backend
node_target_backend -->|"emits"| node_object
node_target_backend -.->|"uses scheduling"| node_nds32_sched
node_object -->|"links"| node_linker
node_linker -->|"produces"| node_executable
node_developer -.->|"enables analysis"| node_analyzer_entry
node_analyzer_entry -->|"runs"| node_analyzer_engine
node_analyzer_engine -->|"models states"| node_analyzer_model
node_analyzer_engine -->|"reports"| node_diagnostics
node_optimization -->|"emits"| node_diagnostics

click node_c_frontend "https://github.com/dmohanty640/gcc/blob/master/gcc/c/c-parser.cc"
click node_c_semantics "https://github.com/dmohanty640/gcc/blob/master/gcc/c/c-typeck.cc"
click node_rust_frontend "https://github.com/dmohanty640/gcc/blob/master/gcc/rust/rust-session-manager.cc"
click node_ada_frontend "https://github.com/dmohanty640/gcc/tree/master/gcc/ada"
click node_algol68_frontend "https://github.com/dmohanty640/gcc/tree/master/gcc/algol68"
click node_cobol_frontend "https://github.com/dmohanty640/gcc/tree/master/gcc/cobol"
click node_m2_frontend "https://github.com/dmohanty640/gcc/tree/master/gcc/m2"
click node_ir "https://github.com/dmohanty640/gcc/blob/master/gcc/cfg.cc"
click node_optimization "https://github.com/dmohanty640/gcc/tree/master/gcc"
click node_diagnostics "https://github.com/dmohanty640/gcc/tree/master/gcc/c-family"
click node_analyzer_entry "https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/analyzer-pass.cc"
click node_analyzer_engine "https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/engine.cc"
click node_analyzer_model "https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/region-model.cc"
click node_target_backend "https://github.com/dmohanty640/gcc/tree/master/gcc/config"
click node_nds32_sched "https://github.com/dmohanty640/gcc/blob/master/gcc/config/nds32/nds32-pipelines-auxiliary.cc"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_c_frontend,node_c_semantics,node_rust_frontend,node_ada_frontend,node_algol68_frontend,node_cobol_frontend,node_m2_frontend,node_developer toneBlue
class node_ir,node_optimization,node_diagnostics toneAmber
class node_analyzer_entry,node_analyzer_engine,node_analyzer_model toneMint
class node_target_backend,node_nds32_sched toneRose
class node_source,node_object,node_linker,node_executable toneIndigo
```

## Components

### Language front ends

- [C parser](https://github.com/dmohanty640/gcc/blob/master/gcc/c/c-parser.cc): `gcc/c/c-parser.cc`
- [C semantics](https://github.com/dmohanty640/gcc/blob/master/gcc/c/c-typeck.cc): `gcc/c/c-typeck.cc`
- [Rust session](https://github.com/dmohanty640/gcc/blob/master/gcc/rust/rust-session-manager.cc): `gcc/rust/rust-session-manager.cc`
- [Ada front end](https://github.com/dmohanty640/gcc/tree/master/gcc/ada): `gcc/ada`
- [Algol 68 front end](https://github.com/dmohanty640/gcc/tree/master/gcc/algol68): `gcc/algol68`
- [COBOL front end](https://github.com/dmohanty640/gcc/tree/master/gcc/cobol): `gcc/cobol`
- [Modula-2 front end](https://github.com/dmohanty640/gcc/tree/master/gcc/m2): `gcc/m2`

### Compiler core

- [GIMPLE and CFG](https://github.com/dmohanty640/gcc/blob/master/gcc/cfg.cc): `gcc/cfg.cc`
- [Optimization passes](https://github.com/dmohanty640/gcc/tree/master/gcc): `gcc`
- [Compiler diagnostics](https://github.com/dmohanty640/gcc/tree/master/gcc/c-family): `gcc/c-family`

### Program analysis

- [Analyzer pass](https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/analyzer-pass.cc): `gcc/analyzer/analyzer-pass.cc`
- [Analysis engine](https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/engine.cc): `gcc/analyzer/engine.cc`
- [Program state model](https://github.com/dmohanty640/gcc/blob/master/gcc/analyzer/region-model.cc): `gcc/analyzer/region-model.cc`

### Target code generation

- [Target backend](https://github.com/dmohanty640/gcc/tree/master/gcc/config): `gcc/config`
- [NDS32 scheduling](https://github.com/dmohanty640/gcc/blob/master/gcc/config/nds32/nds32-pipelines-auxiliary.cc): `gcc/config/nds32/nds32-pipelines-auxiliary.cc`

### Other components

- **Compiler user**
- **Source files**
- **Object code**
- **Linker**
- **Executable**

## Connections

- Compiler user → Source files: provides
- Source files → C parser: parses
- Source files → Rust session: parses
- Source files → Ada front end: parses
- Source files → Algol 68 front end: parses
- Source files → COBOL front end: parses
- Source files → Modula-2 front end: parses
- C parser → C semantics: checks
- C semantics → GIMPLE and CFG: lowers
- Rust session → GIMPLE and CFG: lowers
- Ada front end → GIMPLE and CFG: lowers
- Algol 68 front end → GIMPLE and CFG: lowers
- COBOL front end → GIMPLE and CFG: lowers
- Modula-2 front end → GIMPLE and CFG: lowers
- GIMPLE and CFG → Optimization passes: optimizes
- Optimization passes → Target backend: feeds
- Target backend → Object code: emits
- Target backend → NDS32 scheduling: uses scheduling
- Object code → Linker: links
- Linker → Executable: produces
- Compiler user → Analyzer pass: enables analysis
- Analyzer pass → Analysis engine: runs
- Analysis engine → Program state model: models states
- Analysis engine → Compiler diagnostics: reports
- Optimization passes → Compiler diagnostics: emits