зеркало из https://github.com/github/ruby.git
Implement opt_not with deferred compilation (#44)
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@ -1693,12 +1693,50 @@ gen_opt_empty_p(jitstate_t* jit, ctx_t* ctx)
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static codegen_status_t
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gen_opt_not(jitstate_t* jit, ctx_t* ctx)
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{
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// TODO: can we implement a fast path?
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// Most likely, almost every input to opt_not is true/false/nil?
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// Defer compilation so we can specialize type of argument
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if (!jit_at_current_insn(jit)) {
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defer_compilation(jit->block, jit->insn_idx, ctx);
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return YJIT_END_BLOCK;
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}
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// NOTE: we can't really delegate to OSWB because we currently
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// don't support calls to methods on true/false/nil
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return YJIT_CANT_COMPILE;
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uint8_t* side_exit = yjit_side_exit(jit, ctx);
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VALUE comptime_val = jit_peek_at_stack(jit, ctx, 0);
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// For the true/false case
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if (comptime_val == Qtrue || comptime_val == Qfalse) {
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// Get the operand from the stack
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x86opnd_t arg = ctx_stack_pop(ctx, 1);
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uint32_t DONE = cb_new_label(cb, "DONE");
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// Qtrue => Qfalse
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mov(cb, REG0, imm_opnd(Qfalse));
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cmp(cb, arg, imm_opnd(Qtrue));
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je_label(cb, DONE);
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// Qfalse => Qtrue
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mov(cb, REG0, imm_opnd(Qtrue));
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cmp(cb, arg, imm_opnd(Qfalse));
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je_label(cb, DONE);
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// For any other values, we side-exit
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// This never happens in railsbench
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jmp_ptr(cb, side_exit);
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cb_write_label(cb, DONE);
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cb_link_labels(cb);
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// Push the return value onto the stack
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x86opnd_t stack_ret = ctx_stack_push(ctx, TYPE_IMM);
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mov(cb, stack_ret, REG0);
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return YJIT_KEEP_COMPILING;
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}
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// Delegate to send, call the method on the recv
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return gen_opt_send_without_block(jit, ctx);
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}
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void
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