Improve testing before refactoring minifyLocals (#13618)

Author: kripken

tests/optimizer/test-js-optimizer-minifyLocals-output.js

@@ -1,3 +1,40 @@
-function a() {
+function a(a) {
  b();
 }
+
+function b() {}
+
+function c() {
+ var a = 10;
+ return a;
+}
+
+function d(f, g, h) {
+ var i, j, k, l;
+ i = f;
+ j = g;
+ k = h;
+ l = f;
+ return f + g + h + i + j + k + l;
+}
+
+function l() {
+ a : while (1) {
+  b : while (1) {
+   if (c()) {
+    if (d()) {
+     break a;
+    } else {
+     continue b;
+    }
+   } else {
+    if (d()) {
+     break;
+    } else {
+     continue;
+    }
+   }
+  }
+ }
+ a : while (1) {}
+}

tests/optimizer/test-js-optimizer-minifyLocals.js

@@ -1,5 +1,41 @@
-function main() {
+function main(x) {
  constructor(); // special word in JS, must not be confused by it
 }
+function constructor() {
+}
+function foo() {
+  var bar = 10;
+  return bar;
+}
+function bar(foo, a, b) {
+  var main, c, d, e;
+  main = foo;
+  c = a;
+  d = b;
+  e = foo;
+  return foo + a + b + main + c + d + e;
+}
+function labels() {
+  L1: while (1) {
+    L2: while (1) {
+      if (foo()) {
+        if (bar()) {
+          break L1;
+        } else {
+          continue L2;
+        }
+      } else {
+        if (bar()) {
+          break;
+        } else {
+          continue;
+        }
+      }
+    }
+  }
+  // Another loop with the same name
+  L1: while (1) {
+  }
+}
 // EMSCRIPTEN_GENERATED_FUNCTIONS
-// EXTRA_INFO: { "names": ["a", "b", "c", "d", "e", "f", "g", "h", "i", "i1", "cl"], "globals": { "main": "a", "constructor": "b" } }
+// EXTRA_INFO: { "globals": { "main": "a", "constructor": "b", "foo": "c", "bar": "d", "labels": "l" } }