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2c8d186c6e
This commit introduces an "inline ivar cache" struct. The reason we need this is so compaction can differentiate from an ivar cache and a regular inline cache. Regular inline caches contain references to `VALUE` and ivar caches just contain references to the ivar index. With this new struct we can easily update references for inline caches (but not inline var caches as they just contain an int)
54 lines
2.7 KiB
Text
54 lines
2.7 KiB
Text
% # -*- C -*-
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% # Copyright (c) 2018 Takashi Kokubun. All rights reserved.
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% #
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% # This file is a part of the programming language Ruby. Permission is hereby
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% # granted, to either redistribute and/or modify this file, provided that the
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% # conditions mentioned in the file COPYING are met. Consult the file for
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% # details.
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%
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% # Optimized case of get_instancevariable instruction.
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#if OPT_IC_FOR_IVAR
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{
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% # compiler: Prepare operands which may be used by `insn.call_attribute`
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% insn.opes.each_with_index do |ope, i|
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MAYBE_UNUSED(<%= ope.fetch(:decl) %>) = (<%= ope.fetch(:type) %>)operands[<%= i %>];
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% end
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% # compiler: Use copied IVC to avoid race condition
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IVC ic_copy = &(status->is_entries + ((union iseq_inline_storage_entry *)ic - body->is_entries))->iv_cache;
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%
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% # compiler: Consider cfp->self as T_OBJECT if ic_copy->ic_serial is set
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if (!status->compile_info->disable_ivar_cache && ic_copy->ic_serial) {
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% # JIT: optimize away motion of sp and pc. This path does not call rb_warning() and so it's always leaf and not `handles_sp`.
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% # <%= render 'mjit_compile_pc_and_sp', locals: { insn: insn } -%>
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%
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% # JIT: prepare vm_getivar's arguments and variables
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fprintf(f, "{\n");
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fprintf(f, " VALUE obj = GET_SELF();\n");
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fprintf(f, " const rb_serial_t ic_serial = (rb_serial_t)%"PRI_SERIALT_PREFIX"u;\n", ic_copy->ic_serial);
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fprintf(f, " const st_index_t index = %"PRIuSIZE";\n", ic_copy->index);
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% # JIT: cache hit path of vm_getivar, or cancel JIT.
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% if insn.name == 'setinstancevariable'
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fprintf(f, " VALUE val = stack[%d];\n", b->stack_size - 1);
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fprintf(f, " if (LIKELY(RB_TYPE_P(obj, T_OBJECT) && ic_serial == RCLASS_SERIAL(RBASIC(obj)->klass) && index < ROBJECT_NUMIV(obj) && !RB_OBJ_FROZEN(obj))) {\n");
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fprintf(f, " VALUE *ptr = ROBJECT_IVPTR(obj);\n");
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fprintf(f, " RB_OBJ_WRITE(obj, &ptr[index], val);\n");
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fprintf(f, " }\n");
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% else
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fprintf(f, " VALUE val;\n");
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fprintf(f, " if (LIKELY(RB_TYPE_P(obj, T_OBJECT) && ic_serial == RCLASS_SERIAL(RBASIC(obj)->klass) && index < ROBJECT_NUMIV(obj) && (val = ROBJECT_IVPTR(obj)[index]) != Qundef)) {\n");
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fprintf(f, " stack[%d] = val;\n", b->stack_size);
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fprintf(f, " }\n");
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% end
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fprintf(f, " else {\n");
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fprintf(f, " reg_cfp->pc = original_body_iseq + %d;\n", pos);
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fprintf(f, " reg_cfp->sp = vm_base_ptr(reg_cfp) + %d;\n", b->stack_size);
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fprintf(f, " goto ivar_cancel;\n");
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fprintf(f, " }\n");
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% # compiler: Move JIT compiler's internal stack pointer
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b->stack_size += <%= insn.call_attribute('sp_inc') %>;
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fprintf(f, "}\n");
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break;
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}
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}
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#endif // OPT_IC_FOR_IVAR
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