Emit comments for if statement

Author: sheetalkamat

src/compiler/emitter.ts

@@ -924,10 +924,6 @@ module ts {
             }
 
             function emitIfStatement(node: IfStatement) {
-                // emit comments only if this is not else if statement as else if will take care of emitting the leading/trailing comments
-                if (node.parent.kind !== SyntaxKind.IfStatement || (<IfStatement>node.parent).elseStatement !== node) {
-                    emitLeadingComments(node);
-                }
                 emitLeadingComments(node);
                 var endPos = emitToken(SyntaxKind.IfKeyword, node.pos);
                 write(" ");
@@ -937,7 +933,6 @@ module ts {
                 emitEmbeddedStatement(node.thenStatement);
                 if (node.elseStatement) {
                     writeLine();
-                    emitLeadingComments(node.elseStatement);
                     emitToken(SyntaxKind.ElseKeyword, node.thenStatement.end);
                     if (node.elseStatement.kind === SyntaxKind.IfStatement) {
                         write(" ");

tests/baselines/reference/commentOnIfStatement1.js

@@ -5,5 +5,6 @@ if (true) {
 }
 
 //// [commentOnIfStatement1.js]
+// Test
 if (true) {
 }

tests/baselines/reference/ifDoWhileStatements.js

@@ -218,6 +218,7 @@ var N;
     }
     N.F2 = F2;
 })(N || (N = {}));
+// literals
 if (true) {
 }
 while (true) {

tests/baselines/reference/importNonExternalModule.js

@@ -20,6 +20,7 @@ var foo;
 })(foo || (foo = {}));
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
+    // Import should fail.  foo_0 not an external module
     if (foo.answer === 42) {
     }
 });

tests/baselines/reference/literals-negative.js

@@ -19,5 +19,6 @@ var s = (null);
 var b = (n);
 function isVoid() {
 }
+// Expected error: Values of type null and void cannot be compared
 if (null === isVoid()) {
 }

tests/baselines/reference/voidAsOperator.js

@@ -12,5 +12,6 @@ if (!null !== true) {
 //// [voidAsOperator.js]
 if (!void 0 !== true) {
 }
+//CHECK#2
 if (!null !== true) {
 }