Faster implementation of Math.exp()

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index e5290783d5a858aef51c860bb5fdc2e19d220401..47a9da3b45deb917e7b4a5c213b4db57a3625d1d 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -2084,6 +2084,9 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
         set_representation(Representation::Double());
         SetGVNFlag(kChangesNewSpacePromotion);
         break;
+      case kMathExp:
+        set_representation(Representation::Double());
+        break;
       default:
         UNREACHABLE();
     }
@@ -2110,6 +2113,7 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
         case kMathSqrt:
         case kMathPowHalf:
         case kMathLog:
+        case kMathExp:
         case kMathSin:
         case kMathCos:
         case kMathTan: