Introduce SmiValuesAre31Bits and SmiValuesAre32Bits global predicate functions

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 3be500814533e45ee0b6273f45577438fa35019f..9714b1da34f2df94a357b3b1d865e5848f4bd15b 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -1360,7 +1360,7 @@ THREADED_TEST(BigSmiInteger) {
 
   int32_t value = i::Smi::kMaxValue;
   // We cannot add one to a Smi::kMaxValue without wrapping.
-  if (i::kSmiValueSize < 32) {
+  if (i::SmiValuesAre31Bits()) {
     CHECK(i::Smi::IsValid(value));
     CHECK(!i::Smi::IsValid(value + 1));
 
@@ -1379,7 +1379,7 @@ THREADED_TEST(BigInteger) {
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
 
   // We cannot add one to a Smi::kMaxValue without wrapping.
-  if (i::kSmiValueSize < 32) {
+  if (i::SmiValuesAre31Bits()) {
     // The casts allow this to compile, even if Smi::kMaxValue is 2^31-1.
     // The code will not be run in that case, due to the "if" guard.
     int32_t value =