Add unit test for comparison of smi constants, loops, and...

test/mjsunit/compare-constants.js

Index: test/mjsunit/compare-constants.js
===================================================================
--- test/mjsunit/compare-constants.js	(revision 0)
+++ test/mjsunit/compare-constants.js	(revision 0)
@@ -0,0 +1,123 @@
+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test comparison operations that involve one or two constant Smis.
+
+
+function foo() {
+  var i = 5;
+  var j = 3;
+  
+  assertTrue( j < i );
+  i = 5; j = 3;
+  assertTrue( j <= i );
+  i = 5; j = 3;
+  assertTrue( i > j );
+  i = 5; j = 3;
+  assertTrue( i >= j );
+  i = 5; j = 3;
+  assertTrue( i != j );
+  i = 5; j = 3;
+  assertTrue( i == i );
+  i = 5; j = 3;
+  assertFalse( i < j );
+  i = 5; j = 3;
+  assertFalse( i <= j );
+  i = 5; j = 3;
+  assertFalse( j > i );
+  i = 5; j = 3;
+  assertFalse(j >= i );
+  i = 5; j = 3;
+  assertFalse( j == i);
+  i = 5; j = 3;
+  assertFalse( i != i);
+
+  i = 10 * 10;
+  while ( i < 107 ) {
+    ++i;
+  }
+  j = 21;
+  
+  
+  assertTrue( j < i );
+  j = 21;
+  assertTrue( j <= i );
+  j = 21;
+  assertTrue( i > j );
+  j = 21;
+  assertTrue( i >= j );
+  j = 21;
+  assertTrue( i != j );
+  j = 21;
+  assertTrue( i == i );
+  j = 21;
+  assertFalse( i < j );
+  j = 21;
+  assertFalse( i <= j );
+  j = 21;
+  assertFalse( j > i );
+  j = 21;
+  assertFalse(j >= i );
+  j = 21;
+  assertFalse( j == i);
+  j = 21;
+  assertFalse( i != i);
+  j = 21;
+  assertTrue( j == j );
+  j = 21;
+  assertFalse( j != j );
+
+  assertTrue( 100 > 99 );
+  assertTrue( 101 >= 90 );
+  assertTrue( 11111 > -234 );
+  assertTrue( -888 <= -20 );
+
+  while ( 234 > 456 ) {
+    i = i + 1;
+  }
+
+  switch(3) {
+    case 5:
+      assertUnreachable();
+      break;
+    case 3:
+      j = 13;
+    default:
+      i = 2;
+    case 7:
+      j = 17;
+      break;
+    case 9:
+      j = 19;
+      assertUnreachable();
+      break;
+  }
+  assertEquals(17, j, "switch with constant value");      
+}
+
+foo();
+