[FIX] Do not try to hoist memory intrinsic

Since we do not necessarily treat memory intrinsics as non-affine
anymore, we have to check for them explicitly before we try to hoist an
access.

llvm-svn: 287270
diff --git a/polly/lib/Analysis/ScopInfo.cpp b/polly/lib/Analysis/ScopInfo.cpp
index 1858d4a..cb26e9c 100644
--- a/polly/lib/Analysis/ScopInfo.cpp
+++ b/polly/lib/Analysis/ScopInfo.cpp
@@ -676,7 +676,7 @@
 }
 
 void MemoryAccess::buildMemIntrinsicAccessRelation() {
-  assert(isa<MemIntrinsic>(getAccessInstruction()));
+  assert(isMemoryIntrinsic());
   assert(Subscripts.size() == 2 && Sizes.size() == 1);
 
   auto *SubscriptPWA = getPwAff(Subscripts[0]);
@@ -3487,7 +3487,8 @@
   auto &Stmt = *Access->getStatement();
   BasicBlock *BB = Stmt.getEntryBlock();
 
-  if (Access->isScalarKind() || Access->isWrite() || !Access->isAffine())
+  if (Access->isScalarKind() || Access->isWrite() || !Access->isAffine() ||
+      Access->isMemoryIntrinsic())
     return nullptr;
 
   // Skip accesses that have an invariant base pointer which is defined but