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Brendan Sweeney

PROFILE

Brendan Sweeney

Worked on advancing RISC-V architecture support by implementing the Zlasr and Zalasr extensions across espressif/llvm-project and riscv/riscv-isa-manual repositories. Developed backend logic in C++ and LLVM IR to correctly lower atomic load-acquire and store-release operations, ensuring compliance with Zlasr semantics and memory ordering models such as TSO. Enhanced instruction selection and expanded test coverage to validate atomic operation correctness. Contributed to the RISC-V ISA specification by integrating Zalasr, refining synchronization capabilities, and updating Asciidoc documentation for clarity. The work demonstrated depth in compiler development, low-level optimization, and embedded systems, focusing on robust, standards-aligned feature delivery.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

2Total
Bugs
0
Commits
2
Features
2
Lines of code
507
Activity Months2

Work History

December 2025

1 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for riscv/riscv-isa-manual. This period focused on delivering key synchronization capabilities through the Zalasr extension and aligning its advancement with the main ISA spec, along with targeted documentation improvements to ensure clarity and release readiness.

December 2024

1 Commits • 1 Features

Dec 1, 2024

December 2024 monthly summary focusing on key technical achievements and business impact for espressif/llvm-project.

Activity

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Quality Metrics

Correctness95.0%
Maintainability80.0%
Architecture95.0%
Performance80.0%
AI Usage40.0%

Skills & Technologies

Programming Languages

AsciidocC++LLVM IR

Technical Skills

Compiler DevelopmentEmbedded SystemsInstruction Set Architecture (ISA)Low-Level OptimizationRISC-V ArchitectureRISC-V architectureatomic operationsdocumentation

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

espressif/llvm-project

Dec 2024 Dec 2024
1 Month active

Languages Used

C++LLVM IR

Technical Skills

Compiler DevelopmentEmbedded SystemsInstruction Set Architecture (ISA)Low-Level OptimizationRISC-V Architecture

riscv/riscv-isa-manual

Dec 2025 Dec 2025
1 Month active

Languages Used

Asciidoc

Technical Skills

RISC-V architectureatomic operationsdocumentation