update CFG to properly handle do statements

tests/baselines/reference/doWhileUnreachableCode.js

@@ -0,0 +1,26 @@
+//// [doWhileUnreachableCode.ts]
+function test() {
+    let foo = 0;
+    testLoop: do {
+        foo++;
+        continue testLoop;
+    } while (function() {
+        var x = 1;
+        return false;
+    }());
+
+    return foo;
+}
+
+//// [doWhileUnreachableCode.js]
+function test() {
+    var foo = 0;
+    testLoop: do {
+        foo++;
+        continue testLoop;
+    } while (function () {
+        var x = 1;
+        return false;
+    }());
+    return foo;
+}

tests/baselines/reference/doWhileUnreachableCode.symbols

@@ -0,0 +1,22 @@
+=== tests/cases/compiler/doWhileUnreachableCode.ts ===
+function test() {
+>test : Symbol(test, Decl(doWhileUnreachableCode.ts, 0, 0))
+
+    let foo = 0;
+>foo : Symbol(foo, Decl(doWhileUnreachableCode.ts, 1, 7))
+
+    testLoop: do {
+        foo++;
+>foo : Symbol(foo, Decl(doWhileUnreachableCode.ts, 1, 7))
+
+        continue testLoop;
+    } while (function() {
+        var x = 1;
+>x : Symbol(x, Decl(doWhileUnreachableCode.ts, 6, 11))
+
+        return false;
+    }());
+
+    return foo;
+>foo : Symbol(foo, Decl(doWhileUnreachableCode.ts, 1, 7))
+}

tests/baselines/reference/doWhileUnreachableCode.types

@@ -0,0 +1,34 @@
+=== tests/cases/compiler/doWhileUnreachableCode.ts ===
+function test() {
+>test : () => number
+
+    let foo = 0;
+>foo : number
+>0 : 0
+
+    testLoop: do {
+>testLoop : any
+
+        foo++;
+>foo++ : number
+>foo : number
+
+        continue testLoop;
+>testLoop : any
+
+    } while (function() {
+>function() {        var x = 1;        return false;    }() : boolean
+>function() {        var x = 1;        return false;    } : () => boolean
+
+        var x = 1;
+>x : number
+>1 : 1
+
+        return false;
+>false : false
+
+    }());
+
+    return foo;
+>foo : number
+}

tests/cases/compiler/doWhileUnreachableCode.ts

@@ -0,0 +1,12 @@
+function test() {
+    let foo = 0;
+    testLoop: do {
+        foo++;
+        continue testLoop;
+    } while (function() {
+        var x = 1;
+        return false;
+    }());
+
+    return foo;
+}