[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206142 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 5 deletions

diff --git a/lib/CodeGen/ShadowStackGC.cpp b/lib/CodeGen/ShadowStackGC.cpp
index adb3ef9163..628856e399 100644
--- a/lib/CodeGen/ShadowStackGC.cpp
+++ b/lib/CodeGen/ShadowStackGC.cpp
@@ -101,7 +101,7 @@ namespace {
     IRBuilder<> *Next() {
       switch (State) {
       default:
-        return 0;
+        return nullptr;
 
       case 0:
         StateBB = F.begin();
@@ -137,7 +137,7 @@ namespace {
                 Calls.push_back(CI);
 
         if (Calls.empty())
-          return 0;
+          return nullptr;
 
         // Create a cleanup block.
         LLVMContext &C = F.getContext();
@@ -194,7 +194,7 @@ namespace {
 
 void llvm::linkShadowStackGC() { }
 
-ShadowStackGC::ShadowStackGC() : Head(0), StackEntryTy(0) {
+ShadowStackGC::ShadowStackGC() : Head(nullptr), StackEntryTy(nullptr) {
   InitRoots = true;
   CustomRoots = true;
 }
@@ -390,8 +390,8 @@ bool ShadowStackGC::performCustomLowering(Function &F) {
   BasicBlock::iterator IP = F.getEntryBlock().begin();
   IRBuilder<> AtEntry(IP->getParent(), IP);
 
-  Instruction *StackEntry   = AtEntry.CreateAlloca(ConcreteStackEntryTy, 0,
-                                                   "gc_frame");
+  Instruction *StackEntry = AtEntry.CreateAlloca(ConcreteStackEntryTy, nullptr,
+                                                 "gc_frame");
 
   while (isa<AllocaInst>(IP)) ++IP;
   AtEntry.SetInsertPoint(IP->getParent(), IP);