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codegen optimization based on http://d.hatena.ne.jp/mirichi/20120730/p1 [Japanese].

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This commit is contained in:
Yukihiro Matsumoto
2012-07-31 22:21:42 +09:00
parent 1314c59295
commit e87c95eba7
1 changed files with 12 additions and 10 deletions
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src/codegen.c
+12 -10
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@@ -1027,13 +1027,14 @@ codegen(codegen_scope *s, node *tree, int val)
struct loopinfo *lp = loop_push(s, LOOP_NORMAL);
lp->pc1 = new_label(s);
genop(s, MKOP_sBx(OP_JMP, 0));
lp->pc2 = new_label(s);
codegen(s, tree->cdr, NOVAL);
dispatch(s, lp->pc1);
codegen(s, tree->car, VAL);
pop();
lp->pc2 = new_label(s);
genop(s, MKOP_AsBx(OP_JMPNOT, cursp(), 0));
codegen(s, tree->cdr, NOVAL);
genop(s, MKOP_sBx(OP_JMP, lp->pc1 - s->pc));
dispatch(s, lp->pc2);
genop(s, MKOP_AsBx(OP_JMPIF, cursp(), lp->pc2 - s->pc));
loop_pop(s, val);
}
break;
@@ -1043,13 +1044,14 @@ codegen(codegen_scope *s, node *tree, int val)
struct loopinfo *lp = loop_push(s, LOOP_NORMAL);
lp->pc1 = new_label(s);
genop(s, MKOP_sBx(OP_JMP, 0));
lp->pc2 = new_label(s);
codegen(s, tree->cdr, NOVAL);
dispatch(s, lp->pc1);
codegen(s, tree->car, VAL);
pop();
lp->pc2 = new_label(s);
genop(s, MKOP_AsBx(OP_JMPIF, cursp(), 0));
codegen(s, tree->cdr, NOVAL);
genop(s, MKOP_sBx(OP_JMP, lp->pc1 - s->pc));
dispatch(s, lp->pc2);
genop(s, MKOP_AsBx(OP_JMPNOT, cursp(), lp->pc2 - s->pc));
loop_pop(s, val);
}
break;