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
Worked on the espressif/llvm-project repository, focusing on low-level compiler and toolchain enhancements for embedded architectures. Over five months, contributed targeted fixes and new features, such as implementing ESP32H4 custom DSP instruction support and adding Xtensa alias instructions, using C++ and Assembly Language. Addressed stack alignment and code generation correctness for Xtensa and ESP32P4, refining prologue emission and intrinsic definitions to improve runtime reliability. Enhanced test coverage and stabilized cross-architecture builds for Xtensa and RISC-V, ensuring accurate target handling and preventing regressions. The work demonstrated depth in compiler development, embedded systems, and instruction set architecture, emphasizing robust, maintainable solutions.
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
334 peopleSame Organization
@espressif.com209
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
Overview of all repositories you've contributed to across your timeline