add control flow tests

check.py

@@ -83,6 +83,8 @@ def fail(actual, expected):
     if post:
       open('a.normal.js', 'a').write(post)
       open('a.wasm.js', 'a').write(post)
+    else:
+      print '     (no post)'
     for which in ['normal', 'wasm']:
       print '....', which
       proc = subprocess.Popen(['nodejs', 'a.' + which + '.js'], stdout=subprocess.PIPE)

test/control_flow.cpp

@@ -0,0 +1,47 @@
+#include <cmath>
+#include <algorithm>
+#include <emscripten.h>
+
+extern "C" {
+
+int EMSCRIPTEN_KEEPALIVE check_if(int x) {
+  if (x < 10) x++;
+  return x;
+}
+
+int EMSCRIPTEN_KEEPALIVE check_loop(int x) {
+  while (x < 100) x *= 2;
+  return x;
+}
+
+int EMSCRIPTEN_KEEPALIVE check_loop_break(int x) {
+  while (x < 100) {
+    x *= 2;
+    if (x > 30) break;
+    x++;
+  }
+  return x;
+}
+
+int EMSCRIPTEN_KEEPALIVE check_loop_continue(int x) {
+  while (x < 100) {
+    x *= 2;
+    if (x > 30) continue;
+    x++;
+  }
+  return x;
+}
+
+int EMSCRIPTEN_KEEPALIVE check_do_loop(int x) {
+  do {
+    x *= 2;
+    if (x > 1000) break;
+    x--;
+    if (x > 30) continue;
+    x++;
+  } while (x < 100);
+  return x;
+}
+
+}
+

test/control_flow.emcc

@@ -0,0 +1 @@
+["-s", "ASSERTIONS=0"]

test/control_flow.post.js

@@ -0,0 +1,20 @@
+
+function test(name) {
+  Module.print(name);
+  function doTest(x) {
+    Module.print('  ' + [x] + ' ==> ' + Module['_check_' + name](x));
+  }
+  doTest(1);
+  doTest(2);
+  doTest(3);
+  doTest(4);
+  doTest(11);
+  doTest(90);
+}
+
+test('if');
+test('loop');
+test('loop_break');
+test('loop_continue');
+test('do_loop');
+

test/control_flow.txt

@@ -0,0 +1,35 @@
+if
+  1 ==> 2
+  2 ==> 3
+  3 ==> 4
+  4 ==> 5
+  11 ==> 11
+  90 ==> 90
+loop
+  1 ==> 128
+  2 ==> 128
+  3 ==> 192
+  4 ==> 128
+  11 ==> 176
+  90 ==> 180
+loop_break
+  1 ==> 62
+  2 ==> 46
+  3 ==> 62
+  4 ==> 38
+  11 ==> 46
+  90 ==> 180
+loop_continue
+  1 ==> 124
+  2 ==> 184
+  3 ==> 124
+  4 ==> 152
+  11 ==> 184
+  90 ==> 180
+do_loop
+  1 ==> 121
+  2 ==> 121
+  3 ==> 185
+  4 ==> 121
+  11 ==> 169
+  90 ==> 179