print <nullptr>

Author: ro-i

llvm/lib/Transforms/Utils/BasicBlockUtils.cpp

@@ -1778,7 +1778,10 @@ bool llvm::hasOnlySimpleTerminator(const Function &F) {
 
 Printable llvm::printBasicBlock(const BasicBlock *BB) {
   return Printable([BB](raw_ostream &OS) {
-    if (BB)
-      return BB->printAsOperand(OS);
+    if (!BB) {
+      OS << "<nullptr>";
+      return;
+    }
+    BB->printAsOperand(OS);
   });
 }

llvm/unittests/Transforms/Utils/BasicBlockUtilsTest.cpp

@@ -743,5 +743,5 @@ define void @foo() {
     SCheck.clear();
   }
   OS << printBasicBlock(nullptr);
-  EXPECT_EQ(OS.str(), "");
+  EXPECT_EQ(OS.str(), "<nullptr>");
 }