Use nullptr instead of NULL for variadic sentinels

Windows defines NULL to 0, which when used as an argument to a variadic
function, is not a null pointer constant. As a result, Clang's
-Wsentinel fires on this code. Using '0' would be wrong on most 64-bit
platforms, but both MSVC and Clang make it work on Windows. Sidestep the
issue with nullptr.

llvm-svn: 221940

3 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/ShadowStackGC.cpp b/llvm/lib/CodeGen/ShadowStackGC.cpp
index f7c64dac612..0be00f0e7ce 100644
--- a/llvm/lib/CodeGen/ShadowStackGC.cpp
+++ b/llvm/lib/CodeGen/ShadowStackGC.cpp
@@ -144,7 +144,7 @@ namespace {
         LLVMContext &C = F.getContext();
         BasicBlock *CleanupBB = BasicBlock::Create(C, CleanupBBName, &F);
         Type *ExnTy = StructType::get(Type::getInt8PtrTy(C),
-                                      Type::getInt32Ty(C), NULL);
+                                      Type::getInt32Ty(C), nullptr);
         Constant *PersFn =
           F.getParent()->
           getOrInsertFunction("__gcc_personality_v0",
diff --git a/llvm/lib/CodeGen/SjLjEHPrepare.cpp b/llvm/lib/CodeGen/SjLjEHPrepare.cpp
index 396fa5239da..df6ba0b723a 100644
--- a/llvm/lib/CodeGen/SjLjEHPrepare.cpp
+++ b/llvm/lib/CodeGen/SjLjEHPrepare.cpp
@@ -99,7 +99,7 @@ bool SjLjEHPrepare::doInitialization(Module &M) {
                                       VoidPtrTy, // __personality
                                       VoidPtrTy, // __lsda
                                       ArrayType::get(VoidPtrTy, 5), // __jbuf
-                                      NULL);
+                                      nullptr);
   RegisterFn = M.getOrInsertFunction(
       "_Unwind_SjLj_Register", Type::getVoidTy(M.getContext()),
       PointerType::getUnqual(FunctionContextTy), (Type *)nullptr);
diff --git a/llvm/lib/CodeGen/StackProtector.cpp b/llvm/lib/CodeGen/StackProtector.cpp
index e478f31d545..91cc7b70e7f 100644
--- a/llvm/lib/CodeGen/StackProtector.cpp
+++ b/llvm/lib/CodeGen/StackProtector.cpp
@@ -480,12 +480,12 @@ BasicBlock *StackProtector::CreateFailBB() {
   if (Trip.getOS() == llvm::Triple::OpenBSD) {
     Constant *StackChkFail = M->getOrInsertFunction(
         "__stack_smash_handler", Type::getVoidTy(Context),
-        Type::getInt8PtrTy(Context), NULL);
+        Type::getInt8PtrTy(Context), nullptr);
 
     B.CreateCall(StackChkFail, B.CreateGlobalStringPtr(F->getName(), "SSH"));
   } else {
     Constant *StackChkFail = M->getOrInsertFunction(
-        "__stack_chk_fail", Type::getVoidTy(Context), NULL);
+        "__stack_chk_fail", Type::getVoidTy(Context), nullptr);
     B.CreateCall(StackChkFail);
   }
   B.CreateUnreachable();