espressif/llvm-project
Jan 2025 – Sep 2025
5 Months active
Languages Used
C++LLVM IRCPythonAssemblyTableGen
Technical Skills
Assembly LanguageCompiler DevelopmentEmbedded SystemsLow-Level ProgrammingLLVMRISC-V Architecture
Stefan Stipanovic
PROFILE
Stefan Stipanovic
Stefan Stipanovic contributed to the espressif/llvm-project repository by developing and refining low-level compiler infrastructure for embedded targets, focusing on Xtensa, ESP32P4, and ESP32H4 architectures. He implemented custom DSP instruction support for ESP32H4, introduced new built-in functions, and expanded instruction formats to enable specialized optimizations. Stefan addressed stack alignment and code generation correctness issues, improving runtime reliability and test accuracy across RISC-V and Xtensa backends. His work involved C++ and Assembly, leveraging LLVM and toolchain development expertise. Through targeted bug fixes and feature additions, Stefan delivered robust, architecture-specific enhancements that improved both performance and maintainability of the toolchain.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
7Total
Bugs
4
Commits
7
Features
2
Lines of code
9,860
Activity Months5
Your Network
311 people
Work History
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary focused on delivering ESP32H4 Custom DSP Instructions Support within the LLVM backend for espressif/llvm-project. This work introduces support for ESP32H4-specific DSP instructions, including new built-in functions and instruction formats, to enable specialized DSP operations and improve performance on this hardware. A core implementation was added and integrated into the repository to pave the way for DSP-optimized code generation and tooling.
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary focused on delivering ESP32H4 Custom DSP Instructions Support within the LLVM backend for espressif/llvm-project. This work introduces support for ESP32H4-specific DSP instructions, including new built-in functions and instruction formats, to enable specialized DSP operations and improve performance on this hardware. A core implementation was added and integrated into the repository to pave the way for DSP-optimized code generation and tooling.
September 2025
July 2025
3 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for espressif/llvm-project focusing on codegen correctness and new Xtensa alias support across RISCV/ESP32P4 and Xtensa targets. Delivered targeted correctness fixes, expanded alias instructions, and strengthened test coverage to improve reliability and developer throughput.
July 2025
3 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for espressif/llvm-project focusing on codegen correctness and new Xtensa alias support across RISCV/ESP32P4 and Xtensa targets. Delivered targeted correctness fixes, expanded alias instructions, and strengthened test coverage to improve reliability and developer throughput.
June 2025
1 Commits
Jun 1, 2025June 2025: Focused on stabilizing and validating cross-architecture builds in espressif/llvm-project. Key achievements include a critical bug fix improving test accuracy and target handling for Xtensa and RISCV after a rebase, plus refinements to boolean width definitions and linker script configurations to prevent regressions.
1 Commits
Jun 1, 2025June 2025: Focused on stabilizing and validating cross-architecture builds in espressif/llvm-project. Key achievements include a critical bug fix improving test accuracy and target handling for Xtensa and RISCV after a rebase, plus refinements to boolean width definitions and linker script configurations to prevent regressions.
June 2025
April 2025
1 Commits
Apr 1, 2025Month: 2025-04 — espressif/llvm-project Overview: In April 2025, delivered a targeted correctness fix for ESP32P4 intrinsics within LLVM/Clang, improving the reliability and usability of ESP32P4 support in the compiler infrastructure.
April 2025
1 Commits
Apr 1, 2025Month: 2025-04 — espressif/llvm-project Overview: In April 2025, delivered a targeted correctness fix for ESP32P4 intrinsics within LLVM/Clang, improving the reliability and usability of ESP32P4 support in the compiler infrastructure.
January 2025
1 Commits
Jan 1, 2025January 2025 monthly summary for espressif/llvm-project: Key work focused on correcting stack frame alignment for Xtensa backend. Implemented Xtensa frame lowering alignment bug fix by adjusting prologue emission to account for maximum stack alignment requirements. Added a regression test verifying alignment fix for aligned_alloc. Commit: 7c7ca561d13abe0f0660f206cc5730bc42b3e84b. This work improves correctness of function prologues, reduces misalignment risks, and increases runtime reliability for Xtensa targets.
1 Commits
Jan 1, 2025January 2025 monthly summary for espressif/llvm-project: Key work focused on correcting stack frame alignment for Xtensa backend. Implemented Xtensa frame lowering alignment bug fix by adjusting prologue emission to account for maximum stack alignment requirements. Added a regression test verifying alignment fix for aligned_alloc. Commit: 7c7ca561d13abe0f0660f206cc5730bc42b3e84b. This work improves correctness of function prologues, reduces misalignment risks, and increases runtime reliability for Xtensa targets.
January 2025
Activity
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Quality Metrics
Correctness92.8%
Maintainability91.4%
Architecture88.6%
Performance85.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyCC++LLVM IRPythonTableGen
Technical Skills
Assembly LanguageCompiler DevelopmentDSP Instruction Set ArchitectureEmbedded SystemsInstruction Set ArchitectureLLVMLow-Level ProgrammingRISC-VRISC-V ArchitectureTestingToolchain DevelopmentXtensa
Repositories Contributed To
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