Truncate booleans to 0/1 in truncating t-to-i.

test/mjsunit/bitwise-operations-bools.js

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-// Flags: --allow-natives-syntax --load-elimination
+// Test bitwise operations with booleans.
 
-// Test local load elimination of redundant loads and stores.
+var t = 1;
 
-function B(x, y) {
-  this.x = x;
-  this.y = y;
-  return this;
+function testFalseLeftHandSide() {
+  var b;
+  if (t) b = false;
+  assertEquals(b | 1, 1);
+  assertEquals(b & 1, 0);
+  assertEquals(b ^ 1, 1);
+  assertEquals(b << 1, 0);
+  assertEquals(b >> 1, 0);
+  assertEquals(b >>> 1, 0);
 }
 
-function test_load() {
-  var a = new B(1, 2);
-  return a.x + a.x + a.x + a.x;
+function testFalseRightHandSide() {
+  if (t) b = false;
+  assertEquals(1 |   b, 1);
+  assertEquals(1 &   b, 0);
+  assertEquals(1 ^   b, 1);
+  assertEquals(1 <<  b, 1);
+  assertEquals(1 >>  b, 1);
+  assertEquals(1 >>> b, 1);
 }
 
-function test_store_load() {
-  var a = new B(1, 2);
-  a.x = 4;
-  var f = a.x;
-  a.x = 5;
-  var g = a.x;
-  a.x = 6;
-  var h = a.x;
-  a.x = 7;
-  return f + g + h + a.x;
+function testTrueLeftHandSide() {
+  if (t) b = true;
+  assertEquals(b | 1, 1);
+  assertEquals(b & 1, 1);
+  assertEquals(b ^ 1, 0);
+  assertEquals(b << 1, 2);
+  assertEquals(b >> 1, 0);
+  assertEquals(b >>> 1, 0);
 }
 
-function test_nonaliasing_store1() {
-  var a = new B(2, 3), b = new B(3, 4);
-  b.x = 4;
-  var f = a.x;
-  b.x = 5;
-  var g = a.x;
-  b.x = 6;
-  var h = a.x;
-  b.x = 7;
-  return f + g + h + a.x;
+function testTrueRightHandSide() {
+  if (t) b = true;
+  assertEquals(1 |   b, 1);
+  assertEquals(1 &   b, 1);
+  assertEquals(1 ^   b, 0);
+  assertEquals(1 <<  b, 2);
+  assertEquals(1 >>  b, 0);
+  assertEquals(1 >>> b, 0);
 }
 
-function killall() {
-  try { } catch(e) { }
+function testBothSides() {
+  if (t) a = true;
+  if (t) b = false;
+  assertEquals(a |   b, 1);
+  assertEquals(a &   b, 0);
+  assertEquals(a ^   b, 1);
+  assertEquals(a <<  b, 1);
+  assertEquals(a >>  b, 1);
+  assertEquals(a >>> b, 1);
 }
 
-%NeverOptimizeFunction(killall);
 
-function test_store_load_kill() {
-  var a = new B(1, 2);
-  a.x = 4;
-  var f = a.x;
-  a.x = 5;
-  var g = a.x;
-  killall();
-  a.x = 6;
-  var h = a.x;
-  a.x = 7;
-  return f + g + h + a.x;
-}
-
-function test_store_store() {
-  var a = new B(6, 7);
-  a.x = 7;
-  a.x = 7;
-  a.x = 7;
-  a.x = 7;
-  return a.x;
-}
-
-function test(x, f) {
-  assertEquals(x, f());
-  assertEquals(x, f());
-  %OptimizeFunctionOnNextCall(f);
-  assertEquals(x, f());
-}
-
-test(4, test_load);
-test(22, test_store_load);
-test(8, test_nonaliasing_store1);
-test(22, test_store_load_kill);
-test(7, test_store_store);
+testFalseLeftHandSide();
+testFalseRightHandSide();
+testTrueLeftHandSide();
+testTrueRightHandSide();
+testFalseLeftHandSide();
+testFalseRightHandSide();
+testTrueLeftHandSide();
+testTrueRightHandSide();
+testBothSides();
+testBothSides();