Add LLVM IR backend #3
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This commit adds a new LLVM IR backend to the Portable C Compiler (PCC). The backend generates LLVM intermediate representation instead of native assembly code. Changes: - Created arch/llvm/ directory with all required backend files - Added macdefs.h with LLVM type definitions (64-bit target) - Implemented code.c for Pass 1 LLVM IR output generation - Implemented local.c with Pass 1 utility functions - Implemented local2.c for Pass 2 LLVM IR code generation - Added table.c with minimal instruction matching table - Implemented order.c for instruction ordering - Updated configure.ac to recognize 'llvm' as a target CPU The backend uses virtual registers and generates LLVM IR instructions through the zzzcode() mechanism. It supports basic operations including: - Arithmetic operations (add, sub, mul, div, mod) - Bitwise operations (and, or, xor) - Shift operations - Comparison operations - Floating point operations - Function calls To use: configure with --target=llvm-linux-gnu or similar 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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This commit adds a new LLVM IR backend to the Portable C Compiler (PCC). The backend generates LLVM intermediate representation instead of native assembly code.
Changes:
The backend uses virtual registers and generates LLVM IR instructions through the zzzcode() mechanism. It supports basic operations including:
To use: configure with --target=llvm-linux-gnu or similar
🤖 Generated with Claude Code