Merge branch 'bill/merge-cond-cls' of https://github.com/nyu-compiler-construction/pa3-chocopy-code-generation-mjolnir into sanjar/functions

src/main/java/chocopy/pa3/CodeGenImpl.java

@@ -434,8 +434,9 @@ public class CodeGenImpl extends CodeGenBase
         @Override
         public Register analyze(IfExpr node) 
         {
-            node.condition.dispatch(this);
+            Register result = node.condition.dispatch(this);
             Label ln = generateLocalLabel();
+            backend.emitBEQZ(result, ln,"Jump to beginning of loop");
             node.thenExpr.dispatch(this);
             backend.emitJ(ln, "Jump to end of if expression");
             backend.emitLocalLabel(elseBlock, "Else part of if expression");
@@ -447,8 +448,9 @@ public class CodeGenImpl extends CodeGenBase
         @Override
         public Register analyze(IfStmt node) 
         {
-            node.condition.dispatch(this);
+            Register result = node.condition.dispatch(this);
             Label ln = generateLocalLabel();
+            backend.emitBEQZ(result, ln,"Jump to beginning of loop");
             for(Stmt s:node.thenBody)
                 s.dispatch(this);
             backend.emitJ(ln, "Jump to end of if statement");
@@ -737,13 +739,13 @@ public class CodeGenImpl extends CodeGenBase
         {
             Label startLoop = generateLocalLabel(); 
             backend.emitLocalLabel(startLoop, "Beginning of while loop");
-            node.condition.dispatch(this);
+            Register result = node.condition.dispatch(this);
             Label endLoop = elseBlock;
+            backend.emitBEQZ(result, endLoop,"Jump to beginning of loop");
             for(Stmt stmt:node.body)
                 stmt.dispatch(this);
             backend.emitJ(startLoop, "Jump to beginning of loop");
             backend.emitLocalLabel(endLoop, "End of while loop");
-
             return null;
         }