Changpeng Fang
Senior Member Of Technical Staff at Advanced Micro Devices
Sunnyvale, California, United States
Summary
🤩
Rockstar🎓
Top SchoolChangpeng Fang is a Senior Member of Technical Staff with 16 years of experience building and optimizing compilers and runtime systems for heterogeneous and high-performance computing. Based in Sunnyvale, he has driven AMD’s LLVM AMDGPU backend, graphics and ML compiler support, and x86/GCC optimizations while earlier contributing to HotSpot JIT work at Sun and loop-nest optimizations in Open64. His open-source contributions to the prominent llvm-project include fixing complex Clang address-space bugs and implementing constant folding and half/bfloat support for AMDGPU intrinsics, reflecting deep backend and code-generation expertise. Holding a PhD in computer science, he combines research-grade program analysis and microarchitecture work with pragmatic performance tuning across CPUs, GPUs, and accelerators.
16 years of coding experience
9 years of employment as a software developer
Doctor of Philosophy (PhD), Computer Science, Doctor of Philosophy (PhD), Computer Science at Michigan Technological University
Github Skills (9)
compiler-optimization10
code-generation10
c-language10
amdgpu10
backend10
cprogramming-language10
back-end-development10
llvm10
opencl9
Programming languages (4)
Github contributions (5)
llvm/llvm-project
Jan 2023 - Jan 2023
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:171 reviews, 1 commit, 210 PRs in 1 day
Contributions summary:Changpeng contributed to the LLVM project, primarily focusing on the AMDGPU backend. Their work involved fixing an infinite loop issue related to OpenCL address space qualifiers in the Clang compiler. The user also implemented constant folding for the `llvm.amdgcn.trig.preop` intrinsic, optimizing trigonometric operations. Further contributions included adding support for half and bfloat types for global load transform instructions and various bug fixes and optimizations within the AMDGPU code generation.
compilerllvmtoolchain
changpeng/llvm
Aug 2016 - Mar 2024
Contributions:2 PRs, 1 push, 1 branch in 7 years 8 months
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