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more OP_MOVE swap detection in peephole optimization

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2014-08-29 16:24:12 +09:00
parent 3c4cd5428a
commit 607795ffdd
1 changed files with 3 additions and 3 deletions
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src/codegen.c
+3 -3
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@@ -188,13 +188,13 @@ genop_peep(codegen_scope *s, mrb_code i, int val)
if (val) break;
switch (c0) {
case OP_MOVE:
if (GETARG_B(i) == GETARG_A(i0) && GETARG_A(i) == GETARG_B(i0) && GETARG_A(i) >= s->nlocals) {
if (GETARG_B(i) == GETARG_A(i0) && GETARG_A(i) == GETARG_B(i0)) {
/* skip swapping OP_MOVE */
return 0;
}
if (GETARG_B(i) == GETARG_A(i0) && GETARG_A(i0) >= s->nlocals) {
s->iseq[s->pc-1] = MKOP_AB(OP_MOVE, GETARG_A(i), GETARG_B(i0));
return 0;
s->pc--;
return genop_peep(s, MKOP_AB(OP_MOVE, GETARG_A(i), GETARG_B(i0)), val);
}
break;
case OP_LOADI: