Implements SPIRV-Tools optimizer passes with IR manipulation and PassTest registration.
npx skills add https://github.com/LuisaGroup/LuisaCompute --skill spv-opt
Please help me install this Agent Skill. Skill: spv-opt Source: https://github.com/LuisaGroup/LuisaCompute/tree/main/.agents/skills/spv-opt Command: npx skills add https://github.com/LuisaGroup/LuisaCompute --skill spv-opt
Writing custom SPIR-V optimizer passes requires deep knowledge of SPIRV-Tools internals like IRContext, InstructionBuilder, def-use management, and pass registration plumbing, which is poorly documented and error-prone.
Pass or MemPass, implementing Process(), and declaring preserved analyses.SinglePassRunAndCheck, SinglePassRunAndMatch) and the full pass registration flow in optimizer.cpp and CMake.Write a new SPIRV-Tools optimizer pass that removes redundant stores and register it with a CLI flag.
High-intent search queries and answers about installing and using this skill.
Derive a class from spvtools::opt::Pass, implement name() and Process(), and declare preserved analyses in GetPreservedAnalyses(). Iterate functions, blocks, and instructions via get_module(), then return SuccessWithChange or SuccessWithoutChange.
Use the PassTest fixture with SinglePassRunAndCheck for exact output matching or SinglePassRunAndMatch with embedded Effcee CHECK comments in the assembly. Tests live in test/opt/ and support multi-pass pipelines via AddPass and RunAndCheck.
Use MemPass for memory-oriented passes like load/store elimination, since it provides helpers such as GetPtr, IsTargetVar, CollectTargetVars, and Type2Undef. Derive from the base Pass class for general IR transformations.
Modifications invalidate analyses not listed in GetPreservedAnalyses(), and InstructionBuilder only preserves def-use and instruction-to-block mappings. Invalidate stale analyses explicitly and avoid deleting instructions during iteration; collect them first and kill afterward.
Add a CreateMyPassPass factory declaration in optimizer.hpp, implement it in optimizer.cpp, and map the flag name inside RegisterPassFromFlag. Also add the sources to source/opt/CMakeLists.txt and create a test file under test/opt/.
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