Examples with Instruction org.wso2.ballerinalang.programfile.Instruction used on opensource projects

Example 11 with Instruction

use of org.wso2.ballerinalang.programfile.Instruction in project ballerina by ballerina-lang.

the class CodeGenerator method visit.

public void visit(BLangWhile whileNode) {
    Instruction gotoTopJumpInstr = InstructionFactory.get(InstructionCodes.GOTO, getOperand(this.nextIP()));
    this.genNode(whileNode.expr, this.env);
    Operand exitLoopJumpAddr = getOperand(-1);
    Instruction exitLoopJumpInstr = InstructionFactory.get(InstructionCodes.GOTO, exitLoopJumpAddr);
    emit(InstructionCodes.BR_FALSE, whileNode.expr.regIndex, exitLoopJumpAddr);
    this.loopResetInstructionStack.push(gotoTopJumpInstr);
    this.loopExitInstructionStack.push(exitLoopJumpInstr);
    this.genNode(whileNode.body, this.env);
    this.loopResetInstructionStack.pop();
    this.loopExitInstructionStack.pop();
    this.emit(gotoTopJumpInstr);
    exitLoopJumpAddr.value = nextIP();
}