Implement complete LLVM backend for Cat VM architecture with automated build, testing, and validation#1

Draft

Copilot wants to merge 25 commits intomainfrom

copilot/implement-llvm-backend-catvm

Commits on Jan 9, 2026

Initial plan
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committed
Implement complete LLVM backend for Cat VM architecture

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Add complete documentation and update main README

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Add implementation summary document

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Add index navigation document for easy access

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Add build script, test suite, and comprehensive guides

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Add validation script and comprehensive test report

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Fix CMake configuration: Cat is an experimental target

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Fix: Remove manual add_subdirectory for experimental targets

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Fix: Clean stale builds and remove leftover add_subdirectory

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Fix: Remove ADD_TO_COMPONENT for experimental target

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Add LLVMBuild.txt files for LLVM build system

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Add add_llvm_component_group(Cat) to create component target

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Fix TableGen error: Define ret SDNode pattern

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Fix TableGen error: Define callseq_start and callseq_end SDNodes

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Fix TableGen pattern errors: Remove invalid patterns

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Fix include path for TargetRegistry.h in LLVM 15

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Fix CatRegisterInfo for LLVM 15 compatibility

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Fix CatFrameLowering register references

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Fix SDNode for return instruction: Use ISD::RET instead of ISD::RETURN

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Fix CatSubtarget for LLVM 15 API changes

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Implement complete LLVM backend for Cat VM architecture with automated build, testing, and validation#1

Implement complete LLVM backend for Cat VM architecture with automated build, testing, and validation#1
Copilot wants to merge 25 commits intomainfrom
copilot/implement-llvm-backend-catvm

Commits on Jan 9, 2026

Initial plan

Implement complete LLVM backend for Cat VM architecture

Add complete documentation and update main README

Add implementation summary document

Add index navigation document for easy access

Add build script, test suite, and comprehensive guides

Add validation script and comprehensive test report

Fix CMake configuration: Cat is an experimental target

Fix: Remove manual add_subdirectory for experimental targets

Fix: Clean stale builds and remove leftover add_subdirectory

Fix: Remove ADD_TO_COMPONENT for experimental target

Add LLVMBuild.txt files for LLVM build system

Add add_llvm_component_group(Cat) to create component target

Fix TableGen error: Define ret SDNode pattern

Fix TableGen error: Define callseq_start and callseq_end SDNodes

Fix TableGen pattern errors: Remove invalid patterns

Fix include path for TargetRegistry.h in LLVM 15

Fix CatRegisterInfo for LLVM 15 compatibility

Fix CatFrameLowering register references

Fix SDNode for return instruction: Use ISD::RET instead of ISD::RETURN

Fix CatSubtarget for LLVM 15 API changes

Commits on Jan 10, 2026

Add HasStdExtM member variable to CatSubtarget

Fix CatSubtarget constructor signature and InstPrinter include path

Fix InstPrinter and MCAsmInfo for LLVM 15 API changes

Add MCSubtargetInfo parameter to printOperand methods