[llvm] r372430 - [PPC] PPCLoopPreIncPrep - silence static analyzer null dereference warning.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Fri Sep 20 14:27:49 2019
New Revision: 372430

URL: http://llvm.org/viewvc/llvm-project?rev=372430&view=rev
Log:
[PPC] PPCLoopPreIncPrep - silence static analyzer null dereference warning.

Modified:
    llvm/trunk/lib/Target/PowerPC/PPCLoopPreIncPrep.cpp

Modified: llvm/trunk/lib/Target/PowerPC/PPCLoopPreIncPrep.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCLoopPreIncPrep.cpp?rev=372430&r1=372429&r2=372430&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCLoopPreIncPrep.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCLoopPreIncPrep.cpp Fri Sep 20 14:27:49 2019
@@ -481,7 +481,7 @@ bool PPCLoopPreIncPrep::runOnLoop(Loop *
         if (PtrIP && isa<Instruction>(NewBasePtr) &&
             cast<Instruction>(NewBasePtr)->getParent() == PtrIP->getParent())
           PtrIP = nullptr;
-        else if (isa<PHINode>(PtrIP))
+        else if (PtrIP && isa<PHINode>(PtrIP))
           PtrIP = &*PtrIP->getParent()->getFirstInsertionPt();
         else if (!PtrIP)
           PtrIP = I->Instr;