diff options
Diffstat (limited to 'yjit_codegen.c')
| -rw-r--r-- | yjit_codegen.c | 114 |
1 files changed, 73 insertions, 41 deletions
diff --git a/yjit_codegen.c b/yjit_codegen.c index 136d7d4dea..54fb6df2c1 100644 --- a/yjit_codegen.c +++ b/yjit_codegen.c @@ -3363,7 +3363,7 @@ gen_send_iseq(jitstate_t *jit, ctx_t *ctx, const struct rb_callinfo *ci, const r // specified at the call site. We need to keep track of the fact that this // value is present on the stack in order to properly set up the callee's // stack pointer. - int kw_bits_shift = 0; + bool doing_kw_call = false; if (vm_ci_flag(ci) & VM_CALL_TAILCALL) { // We can't handle tailcalls @@ -3476,45 +3476,7 @@ gen_send_iseq(jitstate_t *jit, ctx_t *ctx, const struct rb_callinfo *ci, const r } } - // Next, we're going to loop through every keyword that was - // specified by the caller and make sure that it's in the correct - // place. If it's not we're going to swap it around with another one. - for (int kwarg_idx = 0; kwarg_idx < kw_arg->keyword_len; kwarg_idx++) { - ID callee_kwarg = callee_kwargs[kwarg_idx]; - - // If the argument is already in the right order, then we don't - // need to generate any code since the expected value is already - // in the right place on the stack. - if (callee_kwarg == caller_kwargs[kwarg_idx]) continue; - - // In this case the argument is not in the right place, so we - // need to find its position where it _should_ be and swap with - // that location. - for (int swap_idx = kwarg_idx + 1; swap_idx < kw_arg->keyword_len; swap_idx++) { - if (callee_kwarg == caller_kwargs[swap_idx]) { - // First we're going to generate the code that is going - // to perform the actual swapping at runtime. - stack_swap(ctx, cb, argc - 1 - swap_idx - lead_num, argc - 1 - kwarg_idx - lead_num, REG1, R9); - - // Next we're going to do some bookkeeping on our end so - // that we know the order that the arguments are - // actually in now. - ID tmp = caller_kwargs[kwarg_idx]; - caller_kwargs[kwarg_idx] = caller_kwargs[swap_idx]; - caller_kwargs[swap_idx] = tmp; - - break; - } - } - } - - // Keyword arguments cause a special extra local variable to be - // pushed onto the stack that represents the parameters that weren't - // explicitly given a value. Its value is a bitmap that corresponds - // to the indices of the missing parameters. In this case since we - // know every value was specified, we can just write the value 0. - kw_bits_shift = 1; - mov(cb, ctx_stack_opnd(ctx, -1), imm_opnd(INT2FIX(0))); + doing_kw_call = true; } else if (argc == lead_num) { // Here we are calling a method that accepts keyword arguments @@ -3580,6 +3542,76 @@ gen_send_iseq(jitstate_t *jit, ctx_t *ctx, const struct rb_callinfo *ci, const r cmp(cb, REG_CFP, REG0); jle_ptr(cb, COUNTED_EXIT(side_exit, send_se_cf_overflow)); + if (doing_kw_call) { + // Here we're calling a method with keyword arguments and specifying + // keyword arguments at this call site. + const int lead_num = iseq->body->param.lead_num; + + // This struct represents the metadata about the caller-specified + // keyword arguments. + const struct rb_callinfo_kwarg *kw_arg = vm_ci_kwarg(ci); + + // This struct represents the metadata about the callee-specified + // keyword parameters. + const struct rb_iseq_param_keyword *keyword = iseq->body->param.keyword; + + // Note: we are about to do argument shuffling for a keyword argument + // call. The various checks for whether we can do it happened earlier + // in this function. + RUBY_ASSERT((kw_arg->keyword_len == keyword->num) && (lead_num == argc - kw_arg->keyword_len)); + + // This is the list of keyword arguments that the callee specified + // in its initial declaration. + const ID *callee_kwargs = keyword->table; + + // Here we're going to build up a list of the IDs that correspond to + // the caller-specified keyword arguments. If they're not in the + // same order as the order specified in the callee declaration, then + // we're going to need to generate some code to swap values around + // on the stack. + ID *caller_kwargs = ALLOCA_N(VALUE, kw_arg->keyword_len); + for (int kwarg_idx = 0; kwarg_idx < kw_arg->keyword_len; kwarg_idx++) + caller_kwargs[kwarg_idx] = SYM2ID(kw_arg->keywords[kwarg_idx]); + + // Next, we're going to loop through every keyword that was + // specified by the caller and make sure that it's in the correct + // place. If it's not we're going to swap it around with another one. + for (int kwarg_idx = 0; kwarg_idx < kw_arg->keyword_len; kwarg_idx++) { + ID callee_kwarg = callee_kwargs[kwarg_idx]; + + // If the argument is already in the right order, then we don't + // need to generate any code since the expected value is already + // in the right place on the stack. + if (callee_kwarg == caller_kwargs[kwarg_idx]) continue; + + // In this case the argument is not in the right place, so we + // need to find its position where it _should_ be and swap with + // that location. + for (int swap_idx = kwarg_idx + 1; swap_idx < kw_arg->keyword_len; swap_idx++) { + if (callee_kwarg == caller_kwargs[swap_idx]) { + // First we're going to generate the code that is going + // to perform the actual swapping at runtime. + stack_swap(ctx, cb, argc - 1 - swap_idx - lead_num, argc - 1 - kwarg_idx - lead_num, REG1, REG0); + + // Next we're going to do some bookkeeping on our end so + // that we know the order that the arguments are + // actually in now. + ID tmp = caller_kwargs[kwarg_idx]; + caller_kwargs[kwarg_idx] = caller_kwargs[swap_idx]; + caller_kwargs[swap_idx] = tmp; + + break; + } + } + } + + // Keyword arguments cause a special extra local variable to be + // pushed onto the stack that represents the parameters that weren't + // explicitly given a value. Its value is a bitmap that corresponds + // to the indices of the missing parameters. In this case since we + // know every value was specified, we can just write the value 0. + mov(cb, ctx_stack_opnd(ctx, -1), imm_opnd(INT2FIX(0))); + } // Points to the receiver operand on the stack x86opnd_t recv = ctx_stack_opnd(ctx, argc); @@ -3599,7 +3631,7 @@ gen_send_iseq(jitstate_t *jit, ctx_t *ctx, const struct rb_callinfo *ci, const r } // Adjust the callee's stack pointer - lea(cb, REG0, ctx_sp_opnd(ctx, sizeof(VALUE) * (3 + num_locals + kw_bits_shift))); + lea(cb, REG0, ctx_sp_opnd(ctx, sizeof(VALUE) * (3 + num_locals + doing_kw_call))); // Initialize local variables to Qnil for (int i = 0; i < num_locals; i++) { |