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compile.c: massign optimization

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* 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
This commit is contained in:
nobu 2015-02-16 11:58:52 +00:00
parent 1917960510
commit 4aa088c72f
2 changed files with 32 additions and 3 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
Mon Feb 16 20:58:49 2015 Nobuyoshi Nakada <nobu@ruby-lang.org>
* 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
Sun Feb 15 10:41:23 2015 Sho Hashimoto <sho-h@ruby-lang.org>
* doc/standard_library.rdoc: [DOC] delete removed libraries.

28
compile.c
View file

@ -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) {