From ea38e42e96321521cd0583f208c4bcc008bc51b9 Mon Sep 17 00:00:00 2001
From: Shreya Singh <40202207+SHREYASINGH29@users.noreply.github.com>
Date: Thu, 24 Jun 2021 17:46:26 +0530
Subject: [PATCH 1/2] Handle null pointer

---
 lib/Token/Token.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/Token/Token.cpp b/lib/Token/Token.cpp
index 48964af..b63e219 100644
--- a/lib/Token/Token.cpp
+++ b/lib/Token/Token.cpp
@@ -12,6 +12,8 @@ void Token::set(llvm::Value *Val, unsigned int Kind, std::string Index,
   this->IsGlobal = Global;
   if (!Func)
     this->IsGlobal = true;
+  if(llvm::isa<llvm::ConstantPointerNull>(Val))
+    this->name = "NULL";
 }
 
 void Token::set(llvm::Type *Ty, unsigned int Kind, std::string Index) {
@@ -161,6 +163,8 @@ std::ostream &operator<<(std::ostream &OS, const Token &A) {
 /// function etc
 llvm::StringRef Token::getName() const {
   if (this->Kind == 0) {
+    if(this->name != "")
+      return this->name;
     return this->Val->getName();
   } else if (this->Kind == 2) {
     return this->Arg->getName();
@@ -234,6 +238,11 @@ bool Token::isValPointerType() const {
  return false;
 }
 
+///  isNullPointer - Return true if token is a nullptr
+bool Token::isNullPointer() const {
+  return this->name == "NULL";
+}
+
 ///  getHash - Calculates the hash for alias to avoid multiple enteries of same
 ///  alias
 std::string Token::getHash() const {

From 754ace8f7253e2794a3fad7c3a6bb94a134541b4 Mon Sep 17 00:00:00 2001
From: Shreya Singh <40202207+SHREYASINGH29@users.noreply.github.com>
Date: Thu, 24 Jun 2021 17:50:24 +0530
Subject: [PATCH 2/2] Declare null pointer check

---
 include/Token/Token.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/Token/Token.h b/include/Token/Token.h
index 9dea750..af18552 100644
--- a/include/Token/Token.h
+++ b/include/Token/Token.h
@@ -10,6 +10,7 @@
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/IR/Constants.h"
 
 namespace spatial {
 
@@ -68,6 +69,7 @@ class Token {
   bool isValPointerType() const;
   std::string getHash() const;
   bool isPointerType() const;
+  bool isNullPointer() const;
 
   bool operator<(const Token &TheToken) const;
   bool operator==(const Token &TheToken) const;