Revert r152745 as it's breaking the internal buildbots.

Abbreviated commit message:
Provide -Wnull-conversion separately from -Wconversion.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152765 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/nullptr.cpp b/test/Analysis/nullptr.cpp
index 3119b4f..c0fed87 100644
--- a/test/Analysis/nullptr.cpp
+++ b/test/Analysis/nullptr.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -std=c++11 -Wno-conversion-null -analyze -analyzer-checker=core -analyzer-store region -verify %s
+// RUN: %clang_cc1 -std=c++11 -analyze -analyzer-checker=core -analyzer-store region -verify %s
 
 // test to see if nullptr is detected as a null pointer
 void foo1(void) {
diff --git a/test/SemaCXX/__null.cpp b/test/SemaCXX/__null.cpp
index 56e59c0..1989a45 100644
--- a/test/SemaCXX/__null.cpp
+++ b/test/SemaCXX/__null.cpp
@@ -1,5 +1,5 @@
-// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -Wno-null-conversion -fsyntax-only -verify
-// RUN: %clang_cc1 -triple i686-unknown-unknown %s -Wno-null-conversion -fsyntax-only -verify
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -fsyntax-only -verify
+// RUN: %clang_cc1 -triple i686-unknown-unknown %s -fsyntax-only -verify
 
 void f() {
   int* i = __null;
diff --git a/test/SemaCXX/conversion.cpp b/test/SemaCXX/conversion.cpp
index d9ba07a..b069abc 100644
--- a/test/SemaCXX/conversion.cpp
+++ b/test/SemaCXX/conversion.cpp
@@ -53,14 +53,10 @@
   };
 }
 
-// This file tests -Wnull-conversion, a subcategory of -Wconversion
-// which is on by default.
-
 void test3() {
   int a = NULL; // expected-warning {{implicit conversion of NULL constant to integer}}
   int b;
   b = NULL; // expected-warning {{implicit conversion of NULL constant to integer}}
-  long l = NULL; // FIXME: this should also warn, but currently does not if sizeof(NULL)==sizeof(inttype)
   int c = ((((NULL)))); // expected-warning {{implicit conversion of NULL constant to integer}}
   int d;
   d = ((((NULL)))); // expected-warning {{implicit conversion of NULL constant to integer}}