[llvm] r369094 - [SLPVectorizer] Silence null dereference warning. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Fri Aug 16 03:28:23 2019
New Revision: 369094

URL: http://llvm.org/viewvc/llvm-project?rev=369094&view=rev
Log:
[SLPVectorizer] Silence null dereference warning. NFCI.

cppcheck + MSVC analyzer both over zealously warn that we might dereference a null Bundle pointer - add an assertion to check for null to silence the warning, plus its a good idea to check that we succeeded in finding a schedule bundle anyway....

Modified:
    llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp

Modified: llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp?rev=369094&r1=369093&r2=369094&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp Fri Aug 16 03:28:23 2019
@@ -4308,6 +4308,7 @@ bool BoUpSLP::BlockScheduling::trySchedu
     resetSchedule();
     initialFillReadyList(ReadyInsts);
   }
+  assert(Bundle && "Failed to find schedule bundle");
 
   LLVM_DEBUG(dbgs() << "SLP: try schedule bundle " << *Bundle << " in block "
                     << BB->getName() << "\n");