Fix bug in HPhi::SimplifyConstantInput

test/mjsunit/regress/regress-phi-truncation.js

Index: test/mjsunit/regress/regress-phi-truncation.js
diff --git a/test/mjsunit/regress/regress-247688.js b/test/mjsunit/regress/regress-phi-truncation.js
similarity index 63%
copy from test/mjsunit/regress/regress-247688.js
copy to test/mjsunit/regress/regress-phi-truncation.js
index 80e2884c705ef230e96a93ede8e5815175b01363..940efe335731c50f4afd1a9221ecbfc233138821 100644
--- a/test/mjsunit/regress/regress-247688.js
+++ b/test/mjsunit/regress/regress-phi-truncation.js
@@ -27,54 +27,63 @@
 
 // Flags: --allow-natives-syntax
 
-var a = {};
-a.x = 1
-a.y = 1.5
+function test(fun, expectation) {
+  assertEquals(1, fun(1));
+  %OptimizeFunctionOnNextCall(fun);
+  assertEquals(expectation, fun(0));
+}
 
-var b = {}
-b.x = 1.5;
-b.y = 1;
+test(function(x) {
+  var a = x ? true : false;
+  return a | 0;
+}, 0);
 
-var c = {}
-c.x = 1.5;
+test(function(x) {
+  var a = x ? true : true;
+  return a | 0;
+}, 1);
 
-var d = {}
-d.x = 1.5;
+test(function(x) {
+  var a = x ? true : "0";
+  return a | 0;
+}, 0);
 
-var e = {}
-e.x = 1.5;
+test(function(x) {
+  var a = x ? true : "1";
+  return a | 0;
+}, 1);
 
-var f = {}
-f.x = 1.5;
+test(function(x) {
+  var a = x ? true : "-1";
+  return a | 0;
+}, -1);
 
-var g = {}
-g.x = 1.5;
+test(function(x) {
+  var a = x ? true : "-0";
+  return a | 0;
+}, 0);
 
-var h = {}
-h.x = 1.5;
+test(function(x) {
+  var a = x ? true : "0x1234";
+  return a | 0;
+}, 0x1234);
 
-var i = {}
-i.x = 1.5;
+test(function(x) {
+  var a = x ? true : { valueOf: function() { return 2; } };
+  return a | 0;
+}, 2);
 
-var o = {}
-var p = {y : 10, z : 1}
-o.__proto__ = p;
-delete p.z
+test(function(x) {
+  var a = x ? true : undefined;
+  return a | 0;
+}, 0);
 
-function foo(v, w) {
-  // Make load via IC in optimized code. Its target will get overwritten by
-  // lazy deopt patch for the stack check.
-  v.y;
-  // Make store with transition to make this code dependent on the map.
-  w.y = 1;
-  return b.y;
-}
+test(function(x) {
+  var a = x ? true : null;
+  return a | 0;
+}, 0);
 
-foo(o, c);
-foo(o, d);
-foo(o, e);
-%OptimizeFunctionOnNextCall(foo);
-foo(b, f);
-foo(b, g);
-foo(b, h);
-foo(a, i);
+test(function(x) {
+  var a = x ? true : "";
+  return a | 0;
+}, 0);