IR: port more tests

test/cases3/while.zig

@@ -31,6 +31,50 @@ fn staticWhileLoop2() -> i32 {
     }
 }
 
+fn continueAndBreak() {
+    @setFnTest(this);
+
+    runContinueAndBreakTest();
+    assert(continue_and_break_counter == 8);
+}
+var continue_and_break_counter: i32 = 0;
+fn runContinueAndBreakTest() {
+    var i : i32 = 0;
+    while (true) {
+        continue_and_break_counter += 2;
+        i += 1;
+        if (i < 4) {
+            continue;
+        }
+        break;
+    }
+    assert(i == 4);
+}
+
+fn returnWithImplicitCastFromWhileLoop() {
+    @setFnTest(this);
+
+    %%returnWithImplicitCastFromWhileLoopTest();
+}
+fn returnWithImplicitCastFromWhileLoopTest() -> %void {
+    while (true) {
+        return;
+    }
+}
+
+fn whileWithContinueExpr() {
+    @setFnTest(this);
+
+    var sum: i32 = 0;
+    {var i: i32 = 0; while (i < 10; i += 1) {
+        if (i == 5) continue;
+        sum += i;
+    }}
+    assert(sum == 40);
+}
+
+
+
 // TODO const assert = @import("std").debug.assert;
 fn assert(ok: bool) {
     if (!ok)