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Osman Yasar

PROFILE

Osman Yasar

Worked on the opencompl/lean-mlir and xdslproject/xdsl repositories, focusing on compiler backend development and optimization for RISC-V architectures. Delivered features such as automating MIR pattern translation and integrating GlobalISel rewrites to enhance the LLVM RISC-V pipeline, using Lean and Python for scripting and code generation. Improved analytics by upgrading instruction-based metrics from arithmetic to geometric mean, increasing statistical accuracy for optimization decisions. Implemented constant folding for shift operations in the RISC-V dialect, adding comprehensive tests to ensure correctness. Emphasized maintainability through static method refactoring and robust testing, demonstrating expertise in compiler design, MLIR, and backend optimization techniques.

Overall Statistics

Feature vs Bugs

83%Features

Repository Contributions

13Total
Bugs
1
Commits
13
Features
5
Lines of code
4,126
Activity Months3

Work History

March 2026

1 Commits • 1 Features

Mar 1, 2026

March 2026 — xdsl project (repository: xdslproject/xdsl). Delivered a targeted optimization in the RISC-V dialect by enabling constant folding for shift operations with immediate operands, along with comprehensive tests. This work improves compile-time optimization opportunities for RISC-V workloads, reduces generated IR for common patterns, and strengthens correctness through targeted negative/positive immediate test cases. The change is captured in commit f294310260d53414e7ae781bee5b5724141af33c (dialect: (riscv) add folding patterns for shift ops (#5656)).

February 2026

11 Commits • 3 Features

Feb 1, 2026

February 2026 monthly summary for opencompl/lean-mlir and xdsl work. Focused on automating LLVM RISC-V backend translation, expanding GlobalISel integration, improving rewrite reliability, and extending RISC-V dialects and interpreter utilities. Delivered automation, performance improvements, and broader backend extensibility with tangible business value.

November 2025

1 Commits • 1 Features

Nov 1, 2025

Month: 2025-11 — opencompl/lean-mlir. Key feature delivered: Geometric-Mean Analytics Enhancement, upgrading the instruction-based analytics from arithmetic mean to geometric mean to improve statistical accuracy. Change captured in commit 0a1c59728d00f7f05df0c1714033b0d8453c4648 with message 'chore: mean to geomean'. No major bugs reported or fixed this month. Overall impact: more reliable analytics data feeding optimization decisions, reducing bias in ratio estimates and enabling data-driven improvements. Technologies/skills demonstrated: statistical computation (geometric mean), analytics pipeline tuning, disciplined Git practices and clear commit hygiene, and proactive alignment with analytics-focused roadmap of lean-mlir.

Activity

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Quality Metrics

Correctness92.2%
Maintainability83.0%
Architecture89.2%
Performance83.0%
AI Usage37.0%

Skills & Technologies

Programming Languages

LeanPythonpython

Technical Skills

Compiler designLLVMLean programmingMLIRPythonPython programmingPython scriptingRISC-VRISC-V architecturebackend developmentcode optimizationcode refactoringcompiler designdata analysisfunctional programming

Repositories Contributed To

2 repos

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

xdslproject/xdsl

Feb 2026 Mar 2026
2 Months active

Languages Used

Pythonpython

Technical Skills

PythonPython programmingRISC-V architecturebackend developmentcompiler designinterpreter design

opencompl/lean-mlir

Nov 2025 Feb 2026
2 Months active

Languages Used

PythonLean

Technical Skills

Pythondata analysisstatistical modelingCompiler designLLVMLean programming