ARM: Use division instructions in lithium and stubs

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

 // Copyright 2012 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
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 //
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --nouse_inlining
+// Flags: --allow-natives-syntax --nouse_inlining --enable_sudiv
 
 // Use this function as reference. Make sure it is not inlined.
 function div(a, b) {
   return a / b;
 }
 
 var limit = 0x1000000;
 var exhaustive_limit = 100;
 var step = 10;
 var values = [0x10000001,
@@ skipping 138 matching lines @@
       assertEquals(Math.floor(div(-(values[i] | 0), -(values[j] | 0))),
                    Math.floor(-(values[i] | 0) / -(values[j] | 0)));
     }
   }
 }
 
 test_div();
 %OptimizeFunctionOnNextCall(test_div);
 test_div();
 
-// Test for negative zero and overflow.
+// Test for negative zero, overflow and division by 0.
 // Separate the tests to prevent deoptimizations from making the other optimized
 // test unreachable.
 
 function IsNegativeZero(x) {
   assertTrue(x == 0);  // Is 0 or -0.
   var y = 1 / x;
   assertFalse(isFinite(y));
   return y < 0;
 }
 
 function test_div_deopt_minus_zero() {
   var zero_in_array = [0];
-  assertTrue(IsNegativeZero(Math.floor((zero_in_array[0] | 0) / -1)));
+  for (var i = 0; i < 2; ++i) {
+    assertTrue(IsNegativeZero(Math.floor((zero_in_array[0] | 0) / -1)));
+  }
 }
 
 function test_div_deopt_overflow() {
   // We box the value in an array to avoid constant propagation.
   var min_int_in_array = [-2147483648];
-  // We use '| 0' to force the representation to int32.
-  assertEquals(-min_int_in_array[0],
-               Math.floor((min_int_in_array[0] | 0) / -1));
+  for (var i = 0; i < 2; ++i) {
+    // We use '| 0' to force the representation to int32.
+    assertEquals(-min_int_in_array[0],
+                 Math.floor((min_int_in_array[0] | 0) / -1));
+  }
+}
+
+function test_div_deopt_div_by_zero() {
+  for (var i = 0; i < 2; ++i) {
+    assertEquals(div(i, 0),
+                 Math.floor(i / 0));
+  }
 }
 
 test_div_deopt_minus_zero();
 test_div_deopt_overflow();
+test_div_deopt_div_by_zero();
 %OptimizeFunctionOnNextCall(test_div_deopt_minus_zero);
 %OptimizeFunctionOnNextCall(test_div_deopt_overflow);
+%OptimizeFunctionOnNextCall(test_div_deopt_div_by_zero);
 test_div_deopt_minus_zero();
 test_div_deopt_overflow();
+test_div_deopt_div_by_zero();