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codegen: add peep hole optimization to skip overridden OP_MOVE

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Yukihiro "Matz" Matsumoto
2015-08-10 15:11:00 +09:00
parent b34ee9a4b4
commit dfaff83eba
1 changed files with 5 additions and 0 deletions
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mrbgems/mruby-compiler/core/codegen.c
+5
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@@ -188,6 +188,11 @@ genop_peep(codegen_scope *s, mrb_code i, int val)
if (val) break;
switch (c0) {
case OP_MOVE:
if (GETARG_A(i) == GETARG_A(i0)) {
/* skip overriden OP_MOVE */
s->pc--;
return genop_peep(s, i, val);
}
if (GETARG_B(i) == GETARG_A(i0) && GETARG_A(i) == GETARG_B(i0)) {
/* skip swapping OP_MOVE */
return 0;