At the beginning of doFinalization set the MachineFunction to

nullptr so that users get an earlier dereferencing error and
so that we can use it to conditionalize access to MachineFunction
specific data.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232820 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 7de5e4f10f1cc5f29fc537832f23ede0b9ce8e8e..098e7989e9448df4a3f9ad729144afeb8e2cae17 100644 (file)
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1004,6 +1004,11 @@ void AsmPrinter::emitGlobalGOTEquivs() {
 }
 
 bool AsmPrinter::doFinalization(Module &M) {
+  // Set the MachineFunction to nullptr so that we can catch attempted
+  // accesses to MF specific features at the module level and so that
+  // we can conditionalize accesses based on whether or not it is nullptr.
+  MF = nullptr;
+
   // Gather all GOT equivalent globals in the module. We really need two
   // passes over the globals: one to compute and another to avoid its emission
   // in EmitGlobalVariable, otherwise we would not be able to handle cases