зеркало из https://github.com/github/ruby.git
compile.c: optimize branches
* compile.c (compile_branch_condition, iseq_compile_each0): eliminate unreachable branches in NODE_IF. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58815 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Коммит
52de826096
23
compile.c
23
compile.c
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@ -2909,6 +2909,7 @@ compile_branch_condition(rb_iseq_t *iseq, LINK_ANCHOR *const ret, NODE *cond,
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LABEL *label = NEW_LABEL(nd_line(cond));
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CHECK(compile_branch_condition(iseq, ret, cond->nd_1st, label,
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else_label));
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if (!label->refcnt) break;
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ADD_LABEL(ret, label);
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cond = cond->nd_2nd;
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goto again;
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@ -2918,6 +2919,7 @@ compile_branch_condition(rb_iseq_t *iseq, LINK_ANCHOR *const ret, NODE *cond,
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LABEL *label = NEW_LABEL(nd_line(cond));
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CHECK(compile_branch_condition(iseq, ret, cond->nd_1st, then_label,
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label));
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if (!label->refcnt) break;
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ADD_LABEL(ret, label);
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cond = cond->nd_2nd;
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goto again;
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@ -4250,7 +4252,7 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, NODE *node, int popp
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INIT_ANCHOR(else_seq);
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then_label = NEW_LABEL(line);
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else_label = NEW_LABEL(line);
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end_label = NEW_LABEL(line);
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end_label = 0;
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compile_branch_condition(iseq, cond_seq, node->nd_cond,
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then_label, else_label);
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@ -4259,14 +4261,21 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, NODE *node, int popp
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ADD_SEQ(ret, cond_seq);
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ADD_LABEL(ret, then_label);
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ADD_SEQ(ret, then_seq);
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ADD_INSNL(ret, line, jump, end_label);
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if (then_label->refcnt) {
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ADD_LABEL(ret, then_label);
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ADD_SEQ(ret, then_seq);
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end_label = NEW_LABEL(line);
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ADD_INSNL(ret, line, jump, end_label);
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}
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ADD_LABEL(ret, else_label);
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ADD_SEQ(ret, else_seq);
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if (else_label->refcnt) {
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ADD_LABEL(ret, else_label);
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ADD_SEQ(ret, else_seq);
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}
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ADD_LABEL(ret, end_label);
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if (end_label) {
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ADD_LABEL(ret, end_label);
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}
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break;
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}
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