diff options
| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-02-16 11:58:52 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-02-16 11:58:52 +0000 |
| commit | 4aa088c72f98308bd6b47ae5bc09c79f358f18d8 (patch) | |
| tree | ad59a5421cb73dec8c29f3b97d024c556cbaec02 /compile.c | |
| parent | 191796051046aa5423585fc027a4c8d470c9438d (diff) | |
| download | ruby-4aa088c72f98308bd6b47ae5bc09c79f358f18d8.tar.gz | |
compile.c: massign optimization
* compile.c (compile_massign): optimization for special case,
assignments by aset or attrset.
http://kokizzu.blogspot.jp/2015/02/c-java-hhvm-ruby-nodejsrhinojscspidermo.html
http://www.atdot.net/~ko1/diary/201502.html#d16
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49614 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'compile.c')
| -rw-r--r-- | compile.c | 28 |
1 files changed, 25 insertions, 3 deletions
@@ -2782,6 +2782,7 @@ compile_massign(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE *node, int poped) if (!poped || splatn || !compile_massign_opt(iseq, ret, rhsn, lhsn)) { int llen = 0; + int expand = 1; DECL_ANCHOR(lhsseq); INIT_ANCHOR(lhsseq); @@ -2797,9 +2798,30 @@ compile_massign(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE *node, int poped) if (!poped) { ADD_INSN(ret, nd_line(node), dup); } - - ADD_INSN2(ret, nd_line(node), expandarray, - INT2FIX(llen), INT2FIX(lhs_splat)); + else if (!lhs_splat) { + INSN *last = (INSN*)ret->last; + if (last->link.type == ISEQ_ELEMENT_INSN && + last->insn_id == BIN(newarray) && + last->operand_size == 1 && + OPERAND_AT(last, 0) == INT2FIX(llen)) { + /* special case: assign to aset or attrset */ + if (llen == 2) { + POP_ELEMENT(ret); + ADD_INSN(ret, nd_line(node), swap); + expand = 0; + } +#if 0 + else if (llen > 2) { + last->insn_id = BIN(reverse); + expand = 0; + } +#endif + } + } + if (expand) { + ADD_INSN2(ret, nd_line(node), expandarray, + INT2FIX(llen), INT2FIX(lhs_splat)); + } ADD_SEQ(ret, lhsseq); if (lhs_splat) { |