[turbofan] Fix truncation/representation sloppiness wrt. bool/bit.

test/mjsunit/compiler/regress-3812.js

Index: test/mjsunit/compiler/regress-3812.js
diff --git a/test/mjsunit/compiler/regress-bit-number-constant.js b/test/mjsunit/compiler/regress-3812.js
similarity index 80%
copy from test/mjsunit/compiler/regress-bit-number-constant.js
copy to test/mjsunit/compiler/regress-3812.js
index ca4cf116d95d65d9935046bcfb871362fda918d6..cfc8febc9a0c832582c2e8f47d3e38db05354808 100644
--- a/test/mjsunit/compiler/regress-bit-number-constant.js
+++ b/test/mjsunit/compiler/regress-3812.js
@@ -9,10 +9,11 @@ var foreign = {}
 var foo = (function Module(stdlib, foreign, heap) {
   "use asm";
   function foo(i) {
-    return !(i ? 1 : false);
+    var x = i ? (i&1) : true;
+    if (x) return x;
+    return false;
   }
   return {foo:foo};
 })(stdlib, foreign, buffer).foo;
 
-assertFalse(foo(1));
-assertTrue(foo(0));
+assertEquals(1, foo(1));