diff options
Diffstat (limited to 'Python/specialize.c')
| -rw-r--r-- | Python/specialize.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/Python/specialize.c b/Python/specialize.c index 8b4aac2f890..91243419ec6 100644 --- a/Python/specialize.c +++ b/Python/specialize.c @@ -338,9 +338,23 @@ _PyCode_Quicken(PyCodeObject *code) assert(opcode < MIN_INSTRUMENTED_OPCODE); int caches = _PyOpcode_Caches[opcode]; if (caches) { - // JUMP_BACKWARD counter counts up from 0 until it is > backedge_threshold - instructions[i + 1].cache = - opcode == JUMP_BACKWARD ? 0 : adaptive_counter_warmup(); + // The initial value depends on the opcode + int initial_value; + switch (opcode) { + case JUMP_BACKWARD: + initial_value = 0; + break; + case POP_JUMP_IF_FALSE: + case POP_JUMP_IF_TRUE: + case POP_JUMP_IF_NONE: + case POP_JUMP_IF_NOT_NONE: + initial_value = 0x5555; // Alternating 0, 1 bits + break; + default: + initial_value = adaptive_counter_warmup(); + break; + } + instructions[i + 1].cache = initial_value; i += caches; } } |