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| author | Takashi Kokubun <takashikkbn@gmail.com> | 2024-02-09 09:12:45 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-02-09 12:12:45 -0500 |
| commit | 717adb564b4dd4a7e34b7b4b734795d7eb272c89 (patch) | |
| tree | 0d81c6068f39332957ed8e5d2603b7c0fa111091 /yjit | |
| parent | 80490acfb601557497d5c10841fc5493e691e6da (diff) | |
YJIT: Fallback megamorphic opt_case_dispatch (#9894)
Diffstat (limited to 'yjit')
| -rw-r--r-- | yjit/src/codegen.rs | 8 | ||||
| -rw-r--r-- | yjit/src/stats.rs | 1 |
2 files changed, 8 insertions, 1 deletions
diff --git a/yjit/src/codegen.rs b/yjit/src/codegen.rs index afcaf54406..1fc0e07fe2 100644 --- a/yjit/src/codegen.rs +++ b/yjit/src/codegen.rs @@ -4037,7 +4037,13 @@ fn gen_opt_case_dispatch( all_fixnum } - if comptime_key.fixnum_p() && comptime_key.0 <= u32::MAX.as_usize() && case_hash_all_fixnum_p(case_hash) { + // If megamorphic, fallback to compiling branch instructions after opt_case_dispatch + let megamorphic = asm.ctx.get_chain_depth() >= CASE_WHEN_MAX_DEPTH; + if megamorphic { + gen_counter_incr(asm, Counter::num_opt_case_dispatch_megamorphic); + } + + if comptime_key.fixnum_p() && comptime_key.0 <= u32::MAX.as_usize() && case_hash_all_fixnum_p(case_hash) && !megamorphic { if !assume_bop_not_redefined(jit, asm, ocb, INTEGER_REDEFINED_OP_FLAG, BOP_EQQ) { return None; } diff --git a/yjit/src/stats.rs b/yjit/src/stats.rs index 056bb41931..8214769d9b 100644 --- a/yjit/src/stats.rs +++ b/yjit/src/stats.rs @@ -592,6 +592,7 @@ make_counters! { num_getivar_megamorphic, num_setivar_megamorphic, + num_opt_case_dispatch_megamorphic, num_throw, num_throw_break, |