[arcmt] When fixing the "unassigned init call" ARC error, make sure

to do a nil check for the result of the call.

rdar://10950973

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153793 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 11 insertions, 3 deletions

diff --git a/lib/ARCMigrate/TransUnusedInitDelegate.cpp b/lib/ARCMigrate/TransUnusedInitDelegate.cpp
index e2aa6ff93c..60ed32aef4 100644
--- a/lib/ARCMigrate/TransUnusedInitDelegate.cpp
+++ b/lib/ARCMigrate/TransUnusedInitDelegate.cpp
@@ -54,7 +54,11 @@ public:
       Transaction Trans(Pass.TA);
       Pass.TA.clearDiagnostic(diag::err_arc_unused_init_message,
                               ME->getExprLoc());
-      Pass.TA.insert(ME->getExprLoc(), "self = ");
+      SourceRange ExprRange = ME->getSourceRange();
+      Pass.TA.insert(ExprRange.getBegin(), "if (!(self = ");
+      std::string retStr = ")) return ";
+      retStr += getNilString(Pass.Ctx);
+      Pass.TA.insertAfterToken(ExprRange.getEnd(), retStr);
     }
     return true;
   }
diff --git a/test/ARCMT/init.m b/test/ARCMT/init.m
index 36e5148476..9dbb1f82b8 100644
--- a/test/ARCMT/init.m
+++ b/test/ARCMT/init.m
@@ -3,6 +3,8 @@
 // RUN: diff %t %s.result
 // DISABLE: mingw32
 
+#define nil (void *)0
+
 @interface NSObject
 -init;
 @end
diff --git a/test/ARCMT/init.m.result b/test/ARCMT/init.m.result
index 9f568d83ed..d7f730083a 100644
--- a/test/ARCMT/init.m.result
+++ b/test/ARCMT/init.m.result
@@ -3,6 +3,8 @@
 // RUN: diff %t %s.result
 // DISABLE: mingw32
 
+#define nil (void *)0
+
 @interface NSObject
 -init;
 @end
@@ -16,7 +18,7 @@
 
 @implementation A
 -(id) init {
-  self = [self init];
+  if (!(self = [self init])) return nil;
   id a;
   [a init];
   a = [[A alloc] init];
@@ -25,7 +27,7 @@
 }
 
 -(id) init2 {
-  self = [super init];
+  if (!(self = [super init])) return nil;
   return self;
 }