[crankshaft] Address the deoptimization loops of Math.floor, Math.round and Math.ceil.

src/crankshaft/hydrogen-instructions.cc

Index: src/crankshaft/hydrogen-instructions.cc
diff --git a/src/crankshaft/hydrogen-instructions.cc b/src/crankshaft/hydrogen-instructions.cc
index 4df90877e31dc4bba42a2928858fbabc7afbe165..073ce023183ccb2ab9aab964ef07cf64927dee4d 100644
--- a/src/crankshaft/hydrogen-instructions.cc
+++ b/src/crankshaft/hydrogen-instructions.cc
@@ -1484,7 +1484,8 @@ HValue* HUnaryMathOperation::Canonicalize() {
           val, representation(), false, false));
     }
   }
-  if (op() == kMathFloor && value()->IsDiv() && value()->HasOneUse()) {
+  if (op() == kMathFloor && representation().IsSmiOrInteger32() &&
+      value()->IsDiv() && value()->HasOneUse()) {
     HDiv* hdiv = HDiv::cast(value());
 
     HValue* left = hdiv->left();