Reland "Handle non-power-of-2 divisors in division-like operations".

test/mjsunit/math-floor-of-div.js

Index: test/mjsunit/math-floor-of-div.js
diff --git a/test/mjsunit/math-floor-of-div.js b/test/mjsunit/math-floor-of-div.js
index d528b85101baa7274d02a7de9e249cb248c40072..707f65714ed16b549c4cf0677d12b07600a6815a 100644
--- a/test/mjsunit/math-floor-of-div.js
+++ b/test/mjsunit/math-floor-of-div.js
@@ -286,3 +286,14 @@ test_div_deopt_div_by_zero_v();
 test_div_deopt_minus_zero_v();
 test_div_deopt_overflow_v();
 test_div_deopt_div_by_zero_v();
+
+
+// Test for flooring division with negative dividend.
+function flooring_div_by_3(y) {
+  return Math.floor(y / 3);
+}
+
+assertEquals(-1, flooring_div_by_3(-2));
+assertEquals(-1, flooring_div_by_3(-2));
+%OptimizeFunctionOnNextCall(flooring_div_by_3);
+assertEquals(-1, flooring_div_by_3(-2));