From dd81583b1a146c901c8f38056fe541cb2adc257b Mon Sep 17 00:00:00 2001
From: Graydon Hoare <ghoare@apple.com>
Date: Wed, 29 Nov 2017 11:27:21 -0800
Subject: [PATCH] [Parse] Fix a couple typos in PR #12964

---
 lib/Basic/LangOptions.cpp   | 2 +-
 lib/Parse/ParseIfConfig.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Basic/LangOptions.cpp b/lib/Basic/LangOptions.cpp
index 8196024f7626d..53d526a9b6b0f 100644
--- a/lib/Basic/LangOptions.cpp
+++ b/lib/Basic/LangOptions.cpp
@@ -263,7 +263,7 @@ std::pair<bool, bool> LangOptions::setTarget(llvm::Triple triple) {
     addPlatformConditionValue(PlatformConditionKind::Runtime, "_Native");
 
   // Set the "targetEnvironment" platform condition if targeting a simulator
-  // environmet. Otherwise _no_ value is present for targetEnvironment; it's
+  // environment. Otherwise _no_ value is present for targetEnvironment; it's
   // an optional disambiguating refinement of the triple.
   if (swift::tripleIsAnySimulator(Target))
     addPlatformConditionValue(PlatformConditionKind::TargetEnvironment,
diff --git a/lib/Parse/ParseIfConfig.cpp b/lib/Parse/ParseIfConfig.cpp
index 3b7c3a5168c1d..a09142e798847 100644
--- a/lib/Parse/ParseIfConfig.cpp
+++ b/lib/Parse/ParseIfConfig.cpp
@@ -550,7 +550,7 @@ static bool isVersionIfConfigCondition(Expr *Condition) {
 /// Get the identifier string from an \c Expr if it's an
 /// \c UnresolvedDeclRefExpr, otherwise the empty string.
 static StringRef getDeclRefStr(Expr *E) {
-  if (auto *UDRE = cast<UnresolvedDeclRefExpr>(E)) {
+  if (auto *UDRE = dyn_cast<UnresolvedDeclRefExpr>(E)) {
     return UDRE->getName().getBaseIdentifier().str();
   }
   return "";