Xilinx/llvm-aie
Jan 2025 – Apr 2026
11 Months active
Languages Used
C++LLVM IRTableGenTclLLVMMir
Technical Skills
Assembly LanguageCode MaintenanceCompiler DevelopmentEmbedded SystemsHardware Description Languages (HDL)Instruction Selection
Marc Ludevid Wulf
PROFILE
Marc Ludevid Wulf
Worked extensively on the Xilinx/llvm-aie repository, delivering robust compiler backend features and optimizations for AIE architectures. Focused on low-level C++ and LLVM development, this work included instruction decoding, register allocation, scheduling algorithms, and code generation improvements. Enhanced test coverage and reliability by building targeted test suites and refining backend validation, while also addressing performance bottlenecks through code refactoring and immediate operand handling. Implemented architectural cleanups and scheduling enhancements to improve hardware utilization and maintainability. The approach emphasized rigorous validation, maintainable code, and efficient debugging, resulting in a more predictable, performant, and scalable backend for embedded and hardware-specific workloads.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
38Total
Bugs
6
Commits
38
Features
15
Lines of code
18,674
Activity Months11
Your Network
2295 peopleSame Organization
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Pryor, AdamMember
Adel JoharMember
Work History
April 2026
2 Commits
Apr 1, 2026In April 2026, delivered performance and quality improvements to Xilinx/llvm-aie. Implemented AIE2PS Scheduling Latency Reduction to reduce delayed moves in the scheduling path, and fixed a compiler warning in AIECombinerHelper.cpp by correcting the lambda capture. Both changes were tracked in commits 570aabaa6096dfcce42f4dc43300c50021d63c8c and 35cc53856646decdb5902c73377ff4e7036bfa93. These enhancements improve AIE pipeline responsiveness, reliability of the build, and overall system throughput for AIE workloads.
2 Commits
Apr 1, 2026In April 2026, delivered performance and quality improvements to Xilinx/llvm-aie. Implemented AIE2PS Scheduling Latency Reduction to reduce delayed moves in the scheduling path, and fixed a compiler warning in AIECombinerHelper.cpp by correcting the lambda capture. Both changes were tracked in commits 570aabaa6096dfcce42f4dc43300c50021d63c8c and 35cc53856646decdb5902c73377ff4e7036bfa93. These enhancements improve AIE pipeline responsiveness, reliability of the build, and overall system throughput for AIE workloads.
April 2026
March 2026
6 Commits • 2 Features
Mar 1, 2026March 2026 performance and backend improvements for Xilinx/llvm-aie: Implemented stability and correctness enhancements in the AIE backend, focusing on instruction selector, register allocation, and scheduling dependency analysis. Resulted in reduced warnings, improved codegen reliability, and stronger scheduling efficiency for AIE targets.
March 2026
6 Commits • 2 Features
Mar 1, 2026March 2026 performance and backend improvements for Xilinx/llvm-aie: Implemented stability and correctness enhancements in the AIE backend, focusing on instruction selector, register allocation, and scheduling dependency analysis. Resulted in reduced warnings, improved codegen reliability, and stronger scheduling efficiency for AIE targets.
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026: Delivered key scheduling and optimization improvements for Xilinx/llvm-aie, focusing on PostPipeliner scheduling and shared optimization patterns. Key features delivered: (1) PostPipeliner scheduling improvements by combining commits dbe9bfa8 and 31a26fa9 to compute earliest cycle from direct predecessors, with an assertion to ensure consistency with scheduled predecessors and a corrected delay strategy for side-effect-free instructions when validation fails. (2) Shared list of post-legalizer custom combines to consolidate optimization patterns across targets, improving target-specific optimization efficiency. Major bugs fixed: SEF peeling scheduling bug fixed as part of the PostPipeliner improvement. Overall impact: more accurate and robust scheduling, fewer erroneous rotations, and reduced maintenance overhead, enabling more predictable performance on AIE targets. Technologies/skills demonstrated: LLVM pass development, scheduling analysis, assertion-driven correctness, cross-target optimization, and clear commit-driven collaboration.
3 Commits • 2 Features
Feb 1, 2026February 2026: Delivered key scheduling and optimization improvements for Xilinx/llvm-aie, focusing on PostPipeliner scheduling and shared optimization patterns. Key features delivered: (1) PostPipeliner scheduling improvements by combining commits dbe9bfa8 and 31a26fa9 to compute earliest cycle from direct predecessors, with an assertion to ensure consistency with scheduled predecessors and a corrected delay strategy for side-effect-free instructions when validation fails. (2) Shared list of post-legalizer custom combines to consolidate optimization patterns across targets, improving target-specific optimization efficiency. Major bugs fixed: SEF peeling scheduling bug fixed as part of the PostPipeliner improvement. Overall impact: more accurate and robust scheduling, fewer erroneous rotations, and reduced maintenance overhead, enabling more predictable performance on AIE targets. Technologies/skills demonstrated: LLVM pass development, scheduling analysis, assertion-driven correctness, cross-target optimization, and clear commit-driven collaboration.
February 2026
January 2026
4 Commits • 1 Features
Jan 1, 2026January 2026 monthly update for Xilinx/llvm-aie: Implemented a lock-aware scheduling reliability and architecture cleanup to strengthen correctness and reliability of lock instruction handling across the AIE scheduling pipelines. Key improvements include memory access tracking enhancements, anti-pipelining safeguards, and removal of an obsolete PostRAScheduler hook to streamline the pipeline. Added baseline tests for epilogue lock scheduling and fixed scheduling for software-pipelined loops containing lock instructions, with targeted guards in pre-RA and post-RA stages. The work reduces scheduling errors, improves hardware utilization, and enhances maintainability and test coverage.
January 2026
4 Commits • 1 Features
Jan 1, 2026January 2026 monthly update for Xilinx/llvm-aie: Implemented a lock-aware scheduling reliability and architecture cleanup to strengthen correctness and reliability of lock instruction handling across the AIE scheduling pipelines. Key improvements include memory access tracking enhancements, anti-pipelining safeguards, and removal of an obsolete PostRAScheduler hook to streamline the pipeline. Added baseline tests for epilogue lock scheduling and fixed scheduling for software-pipelined loops containing lock instructions, with targeted guards in pre-RA and post-RA stages. The work reduces scheduling errors, improves hardware utilization, and enhances maintainability and test coverage.
December 2025
1 Commits
Dec 1, 2025December 2025: Focused on clean code and performance in Xilinx/llvm-aie by removing extraneous debug logging from finalizeDeferredDeletes. The change reduces logging overhead during finalization, clarifies execution flow, and prepares the codebase for future maintenance and optimizations. No feature development in this period; the effort emphasizes stability and efficiency.
1 Commits
Dec 1, 2025December 2025: Focused on clean code and performance in Xilinx/llvm-aie by removing extraneous debug logging from finalizeDeferredDeletes. The change reduces logging overhead during finalization, clarifies execution flow, and prepares the codebase for future maintenance and optimizations. No feature development in this period; the effort emphasizes stability and efficiency.
December 2025
November 2025
6 Commits • 4 Features
Nov 1, 2025Monthly summary for 2025-11 focusing on business value and technical achievements across the Xilinx/llvm-aie repository. This period delivered core feature improvements, essential test readiness, performance-oriented spill optimization, and robustness/maintainability enhancements to the AIE target, resulting in safer releases, improved test coverage, and a stronger foundation for future optimizations.
November 2025
6 Commits • 4 Features
Nov 1, 2025Monthly summary for 2025-11 focusing on business value and technical achievements across the Xilinx/llvm-aie repository. This period delivered core feature improvements, essential test readiness, performance-oriented spill optimization, and robustness/maintainability enhancements to the AIE target, resulting in safer releases, improved test coverage, and a stronger foundation for future optimizations.
September 2025
3 Commits • 1 Features
Sep 1, 2025Month 2025-09 — Xilinx/llvm-aie: Consolidated robustness and performance improvements focused on disassembly of AIE2P, AIEX format handling, and register sizing. Delivered business value through more reliable disassembly, broader register support, and faster builds, enabling quicker iteration and safer hardware variant support.
3 Commits • 1 Features
Sep 1, 2025Month 2025-09 — Xilinx/llvm-aie: Consolidated robustness and performance improvements focused on disassembly of AIE2P, AIEX format handling, and register sizing. Delivered business value through more reliable disassembly, broader register support, and faster builds, enabling quicker iteration and safer hardware variant support.
September 2025
August 2025
1 Commits • 1 Features
Aug 1, 20252025-08 monthly summary focusing on business value and technical achievements for Xilinx/llvm-aie. Key work centered on expanding test coverage for AIE code generation to validate scalar intrinsics and ensure correct LLVM IR output, reducing risk of regressions in codegen paths.
August 2025
1 Commits • 1 Features
Aug 1, 20252025-08 monthly summary focusing on business value and technical achievements for Xilinx/llvm-aie. Key work centered on expanding test coverage for AIE code generation to validate scalar intrinsics and ensure correct LLVM IR output, reducing risk of regressions in codegen paths.
July 2025
5 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for Xilinx/llvm-aie focusing on delivering codegen consistency and encoding improvements with NFC cleanups. Key features and data-driven changes were implemented to standardize AIE machine block alignment and immediate operand encoding across AIE targets, reducing duplication and improving maintainability. NFC target cleanups simplified AIE2/AIE2P target definitions, enabling easier future enhancements and faster onboarding for new targets.
5 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for Xilinx/llvm-aie focusing on delivering codegen consistency and encoding improvements with NFC cleanups. Key features and data-driven changes were implemented to standardize AIE machine block alignment and immediate operand encoding across AIE targets, reducing duplication and improving maintainability. NFC target cleanups simplified AIE2/AIE2P target definitions, enabling easier future enhancements and faster onboarding for new targets.
July 2025
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for Xilinx/llvm-aie. Delivered G_FADD/G_FSUB legalization improvements for AIE2/AIE2P targets, including support for varying input register sizes, clearer function naming, and centralized LLT definitions to improve maintainability. Test updates accompany changes. Resulting in a more robust, maintainable AIE backend with better codegen reliability for AIE2/AIE2P.
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for Xilinx/llvm-aie. Delivered G_FADD/G_FSUB legalization improvements for AIE2/AIE2P targets, including support for varying input register sizes, clearer function naming, and centralized LLT definitions to improve maintainability. Test updates accompany changes. Resulting in a more robust, maintainable AIE backend with better codegen reliability for AIE2/AIE2P.
January 2025
4 Commits • 1 Features
Jan 1, 2025January 2025: Delivered AIE2P Test Suite Cleanup and robust instruction decoding/selection fixes. The changes streamline test maintenance, prevent VLDA.UPS decode/selection errors, and strengthen the AIE2P backend's reliability. Resulting impact includes shorter CI cycles, fewer flaky tests, and more predictable codegen for AIE2P targets. Skills demonstrated include LLVM backend development, test automation discipline, and rigorous validation of instruction info and immediate ranges.
4 Commits • 1 Features
Jan 1, 2025January 2025: Delivered AIE2P Test Suite Cleanup and robust instruction decoding/selection fixes. The changes streamline test maintenance, prevent VLDA.UPS decode/selection errors, and strengthen the AIE2P backend's reliability. Resulting impact includes shorter CI cycles, fewer flaky tests, and more predictable codegen for AIE2P targets. Skills demonstrated include LLVM backend development, test automation discipline, and rigorous validation of instruction info and immediate ranges.
January 2025
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Quality Metrics
Correctness95.0%
Maintainability90.0%
Architecture92.6%
Performance89.4%
AI Usage35.8%
Skills & Technologies
Programming Languages
C++LLVMLLVM IRMirTableGenTcl
Technical Skills
Assembly LanguageC++C++ developmentC++ programmingCode GenerationCode MaintenanceCode RefactoringCompiler DevelopmentCompiler developmentDisassembler DevelopmentDomain-Specific LanguagesEmbedded SystemsHardware Description Languages (HDL)Instruction SelectionInstruction Set Architecture (ISA) Design
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