Feature #17613 ยป 0001-Eliminate-useless-catch-tables-and-nops-from-lambdas.patch
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debugs("[compile step 6 (update_catch_except_flags)] \n");
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update_catch_except_flags(iseq->body);
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debugs("[compile step 6.1 (remove unused catch tables)] \n");
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if (!iseq->body->catch_except_p && iseq->body->catch_table) {
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xfree(iseq->body->catch_table);
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iseq->body->catch_table = NULL;
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}
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#if VM_INSN_INFO_TABLE_IMPL == 2
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if (iseq->body->insns_info.succ_index_table == NULL) {
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debugs("[compile step 7 (rb_iseq_insns_info_encode_positions)] \n");
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| ... | ... | |
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list = FIRST_ELEMENT(anchor);
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int do_block_optimization = 0;
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if (iseq->body->type == ISEQ_TYPE_BLOCK && !iseq->body->catch_except_p) {
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do_block_optimization = 1;
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}
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while (list) {
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if (IS_INSN(list)) {
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if (do_peepholeopt) {
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| ... | ... | |
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if (do_ou) {
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insn_operands_unification((INSN *)list);
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}
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if (do_block_optimization) {
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INSN * item = (INSN *)list;
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if (IS_INSN_ID(item, jump)) {
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do_block_optimization = 0;
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}
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}
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}
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if (IS_LABEL(list)) {
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switch (((LABEL *)list)->rescued) {
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| ... | ... | |
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}
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list = list->next;
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}
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if (do_block_optimization) {
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LINK_ELEMENT * le = FIRST_ELEMENT(anchor)->next;
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if (IS_INSN(le) && IS_INSN_ID((INSN *)le, nop)) {
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ELEM_REMOVE(le);
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}
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}
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return COMPILE_OK;
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}
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