Follow up of rL363913. NFC.

Minor reshuffle in AArch64 targetparser unittest, solving a potential problem
with querying iterators too early.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364168 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Support/TargetParserTest.cpp

@@ -1053,16 +1053,18 @@ TEST(TargetParserTest, AArch64ExtensionFeatures) {
   std::vector<StringRef> Features;
 
   unsigned ExtVal = 0;
-  for (auto E : Extensions)
-    ExtVal |= E;
+  for (auto Ext : Extensions)
+    ExtVal |= Ext;
+
+  EXPECT_FALSE(AArch64::getExtensionFeatures(AArch64::AEK_INVALID, Features));
+  EXPECT_TRUE(!Features.size());
 
   AArch64::getExtensionFeatures(ExtVal, Features);
+  EXPECT_TRUE(Extensions.size() == Features.size());
+
   auto B = std::begin(Features);
   auto E = std::end(Features);
 
-  EXPECT_FALSE(AArch64::getExtensionFeatures(AArch64::AEK_INVALID, Features));
-  EXPECT_TRUE(Extensions.size() == Features.size());
-
   EXPECT_TRUE(std::find(B, E, "+crc") != E);
   EXPECT_TRUE(std::find(B, E, "+crypto") != E);
   EXPECT_TRUE(std::find(B, E, "+fp-armv8") != E);