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RJIT: Optimize Array#empty?

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This commit is contained in:
Takashi Kokubun 2023-03-19 13:41:04 -07:00
parent cd5a8d0160
commit 95c4ced39e
1 changed files with 20 additions and 1 deletions
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21
lib/ruby_vm/rjit/insn_compiler.rb
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@ -2905,6 +2905,25 @@ module RubyVM::RJIT
true
end
# @param jit [RubyVM::RJIT::JITState]
# @param ctx [RubyVM::RJIT::Context]
# @param asm [RubyVM::RJIT::Assembler]
def jit_rb_ary_empty_p(jit, ctx, asm, argc, _known_recv_class)
array_reg = :rax
asm.mov(array_reg, ctx.stack_pop(1))
len_opnd = jit_array_len(asm, array_reg, :rcx)
asm.test(:rcx, :rcx)
asm.mov(:rax, Qfalse)
asm.mov(:rcx, Qtrue)
asm.cmovz(:rax, :rcx)
out_opnd = ctx.stack_push
asm.mov(out_opnd, :rax)
return true
end
# @param jit [RubyVM::RJIT::JITState]
# @param ctx [RubyVM::RJIT::Context]
# @param asm [RubyVM::RJIT::Assembler]
@ -2978,7 +2997,7 @@ module RubyVM::RJIT
register_cfunc_method(String, :+@, :jit_rb_str_uplus)
# rb_ary_empty_p() method in array.c
#register_cfunc_method(Array, :empty?, :jit_rb_ary_empty_p)
register_cfunc_method(Array, :empty?, :jit_rb_ary_empty_p)
#register_cfunc_method(Kernel, :respond_to?, :jit_obj_respond_to)
#register_cfunc_method(Kernel, :block_given?, :jit_rb_f_block_given_p)