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Optimization for case when with splat operator

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[Fix GH-1928] [Feature #14984]

From: chopraanmol1 <chopraanmol1@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64318 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-08-12 08:10:53 +00:00
parent 4fe8308e0c
commit af2e98ae80
1 changed files with 42 additions and 4 deletions
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46
compile.c
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@ -4077,6 +4077,47 @@ when_vals(rb_iseq_t *iseq, LINK_ANCHOR *const cond_seq, const NODE *vals,
return only_special_literals;
}
static int
when_splat_vals(rb_iseq_t *iseq, LINK_ANCHOR *const cond_seq, const NODE *vals,
LABEL *l1, int only_special_literals, VALUE literals)
{
const int line = nd_line(vals);
switch (nd_type(vals)) {
case NODE_ARRAY:
if (when_vals(iseq, cond_seq, vals, l1, only_special_literals, literals) < 0)
return COMPILE_NG;
break;
case NODE_SPLAT:
ADD_INSN (cond_seq, line, dup);
CHECK(COMPILE(cond_seq, "when splat", vals->nd_head));
ADD_INSN1(cond_seq, line, splatarray, Qfalse);
ADD_INSN1(cond_seq, line, checkmatch, INT2FIX(VM_CHECKMATCH_TYPE_CASE | VM_CHECKMATCH_ARRAY));
ADD_INSNL(cond_seq, line, branchif, l1);
break;
case NODE_ARGSCAT:
CHECK(when_splat_vals(iseq, cond_seq, vals->nd_head, l1, only_special_literals, literals));
CHECK(when_splat_vals(iseq, cond_seq, vals->nd_body, l1, only_special_literals, literals));
break;
case NODE_ARGSPUSH:
CHECK(when_splat_vals(iseq, cond_seq, vals->nd_head, l1, only_special_literals, literals));
ADD_INSN (cond_seq, line, dup);
CHECK(COMPILE(cond_seq, "when argspush body", vals->nd_body));
ADD_INSN1(cond_seq, line, checkmatch, INT2FIX(VM_CHECKMATCH_TYPE_CASE));
ADD_INSNL(cond_seq, line, branchif, l1);
break;
default:
ADD_INSN (cond_seq, line, dup);
CHECK(COMPILE(cond_seq, "when val", vals));
ADD_INSN1(cond_seq, line, splatarray, Qfalse);
ADD_INSN1(cond_seq, line, checkmatch, INT2FIX(VM_CHECKMATCH_TYPE_CASE | VM_CHECKMATCH_ARRAY));
ADD_INSNL(cond_seq, line, branchif, l1);
break;
}
return COMPILE_OK;
}
static int
compile_massign_lhs(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *const node)
{
@ -4996,10 +5037,7 @@ compile_case(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *const orig_nod
case NODE_ARGSCAT:
case NODE_ARGSPUSH:
only_special_literals = 0;
ADD_INSN (cond_seq, nd_line(vals), dup);
CHECK(COMPILE(cond_seq, "when/cond splat", vals));
ADD_INSN1(cond_seq, nd_line(vals), checkmatch, INT2FIX(VM_CHECKMATCH_TYPE_CASE | VM_CHECKMATCH_ARRAY));
ADD_INSNL(cond_seq, nd_line(vals), branchif, l1);
CHECK(when_splat_vals(iseq, cond_seq, vals, l1, only_special_literals, literals));
break;
default:
UNKNOWN_NODE("NODE_CASE", vals, COMPILE_NG);