Added CallInterfaceDescriptors to all code stubs.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 0ab6c1d09162ce29f28e7bf52b2bccf517e83a0a..b7b13867d364db65ae469f54f6b2e7e997ed851f 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1635,8 +1635,10 @@ LInstruction* LChunkBuilder::DoPower(HPower* instr) {
   Representation exponent_type = instr->right()->representation();
   DCHECK(instr->left()->representation().IsDouble());
   LOperand* left = UseFixedDouble(instr->left(), xmm2);
-  LOperand* right = exponent_type.IsDouble() ?
-      UseFixedDouble(instr->right(), xmm1) : UseFixed(instr->right(), rdx);
+  LOperand* right =
+      exponent_type.IsDouble()
+          ? UseFixedDouble(instr->right(), xmm1)
+          : UseFixed(instr->right(), MathPowTaggedDescriptor::exponent());
   LPower* result = new(zone()) LPower(left, right);
   return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
                     CAN_DEOPTIMIZE_EAGERLY);