[llvm] r365299 - [ARM] Fix null pointer dereference in CodeGen/ARM/Windows/stack-protector-msvc.ll.test after D64292/r365283

[Fangrui Song via llvm-commits]

Author: maskray
Date: Mon Jul  8 01:43:31 2019
New Revision: 365299

URL: http://llvm.org/viewvc/llvm-project?rev=365299&view=rev
Log:
[ARM] Fix null pointer dereference in CodeGen/ARM/Windows/stack-protector-msvc.ll.test after D64292/r365283

CLI.CS may not be set.

Modified:
    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=365299&r1=365298&r2=365299&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Mon Jul  8 01:43:31 2019
@@ -1981,12 +1981,14 @@ ARMTargetLowering::LowerCall(TargetLower
     // more times in this block, we can improve codesize by calling indirectly
     // as BLXr has a 16-bit encoding.
     auto *GV = cast<GlobalAddressSDNode>(Callee)->getGlobal();
-    auto *BB = CLI.CS.getParent();
-    PreferIndirect =
-        Subtarget->isThumb() && Subtarget->hasMinSize() &&
-        count_if(GV->users(), [&BB](const User *U) {
-          return isa<Instruction>(U) && cast<Instruction>(U)->getParent() == BB;
-        }) > 2;
+    if (CLI.CS) {
+      auto *BB = CLI.CS.getParent();
+      PreferIndirect = Subtarget->isThumb() && Subtarget->hasMinSize() &&
+                       count_if(GV->users(), [&BB](const User *U) {
+                         return isa<Instruction>(U) &&
+                                cast<Instruction>(U)->getParent() == BB;
+                       }) > 2;
+    }
   }
   if (isTailCall) {
     // Check if it's really possible to do a tail call.