Added CallInterfaceDescriptors to all code stubs.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 377d38bb2965dbaa238f7fe762cf17533db501c1..d5c0468c46a17cb54444ae76fc20ee6d00292229 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -3888,10 +3888,11 @@ void LCodeGen::DoPower(LPower* instr) {
   Representation exponent_type = instr->hydrogen()->right()->representation();
   // Having marked this as a call, we can use any registers.
   // Just make sure that the input/output registers are the expected ones.
+  Register tagged_exponent = MathPowTaggedDescriptor::exponent();
   DCHECK(!instr->right()->IsDoubleRegister() ||
          ToDoubleRegister(instr->right()).is(d1));
   DCHECK(!instr->right()->IsRegister() ||
-         ToRegister(instr->right()).is(r2));
+         ToRegister(instr->right()).is(tagged_exponent));
   DCHECK(ToDoubleRegister(instr->left()).is(d0));
   DCHECK(ToDoubleRegister(instr->result()).is(d2));
 
@@ -3900,8 +3901,9 @@ void LCodeGen::DoPower(LPower* instr) {
     __ CallStub(&stub);
   } else if (exponent_type.IsTagged()) {
     Label no_deopt;
-    __ JumpIfSmi(r2, &no_deopt);
-    __ ldr(r6, FieldMemOperand(r2, HeapObject::kMapOffset));
+    __ JumpIfSmi(tagged_exponent, &no_deopt);
+    DCHECK(!r6.is(tagged_exponent));
+    __ ldr(r6, FieldMemOperand(tagged_exponent, HeapObject::kMapOffset));
     __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
     __ cmp(r6, Operand(ip));
     DeoptimizeIf(ne, instr->environment());