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Henrik RydgårdandClaude Opus 5.5
39e6e7b29b
IRJit is now the base the IR JITs share: the frontend, the table of guest blocks, and compiling and invalidating them. IRInterpreterJit and IRNativeJit are the two kinds. Only IRInterpreterJit keeps IR, in its arena, along with its dispatch loop and per-block profile. The native JITs no longer keep the IR they compiled from. The debugger and the --jit-profile report compile a native block's IR again when they want it, on a copy of the frontend's state, which gives what ran unless the code or that state has changed since. IRBlockCache and IRBlock become JitBlockTable and JitBlock: where each block came from, the page lookup for invalidation, and the block shadow entry (an arena or native code offset, depending on the JIT). One IRJitDebugInterface serves both JITs, taking the MIPS code from the table and the IR and host code from the JIT, in place of the native JIT's own debug interface. The native backends don't see the table at all. They compile a span of IR for a block number and start PC, and keep what they need about their own blocks (start PC, code offset, which block starts where, for linking) next to the exits they already tracked. The register cache takes the instructions directly. The tracer's block index now goes into the IR before the block is stored, so native blocks get it too. The unused FindByCookie goes. TestJit checks that the native JIT keeps no IR, and can still show it. The JIT stats overlay no longer shows IR for the native JITs. MIPSState can't be copied, now that it owns its JIT. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>