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Fix bug in AST optimization

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This commit is contained in:
Alexey Andreev 2017-11-21 22:40:22 +03:00
parent 1200354a7b
commit a7ac256c47
1 changed files with 13 additions and 7 deletions
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20
core/src/main/java/org/teavm/ast/optimization/OptimizingVisitor.java
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@ -119,15 +119,21 @@ class OptimizingVisitor implements StatementVisitor, ExprVisitor {
default: default:
break; break;
} }
expr.getSecondOperand().acceptVisitor(this); Expr b = expr.getSecondOperand();
Expr b = resultExpr; Expr a = expr.getFirstOperand();
if (b instanceof ConstantExpr && expr.getOperation() == BinaryOperation.SUBTRACT) {
if (tryMakePositive((ConstantExpr) b)) { if (a instanceof VariableExpr || a instanceof ConstantExpr) {
expr.setOperation(BinaryOperation.ADD); b.acceptVisitor(this);
b = resultExpr;
if (b instanceof ConstantExpr && expr.getOperation() == BinaryOperation.SUBTRACT) {
if (tryMakePositive((ConstantExpr) b)) {
expr.setOperation(BinaryOperation.ADD);
}
} }
a.acceptVisitor(this);
a = resultExpr;
} }
expr.getFirstOperand().acceptVisitor(this);
Expr a = resultExpr;
Expr p = a; Expr p = a;
Expr q = b; Expr q = b;
boolean invert = false; boolean invert = false;