[llvm] r371936 - [LoadStoreVectorizer] vectorizeLoadChain - ensure we find a valid Type down the load chain. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Sun Sep 15 09:44:35 2019
New Revision: 371936

URL: http://llvm.org/viewvc/llvm-project?rev=371936&view=rev
Log:
[LoadStoreVectorizer] vectorizeLoadChain - ensure we find a valid Type down the load chain. NFCI.

Silence static analyzer uninitialized variable warning by setting the LoadTy to null and then asserting we find a real value.

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

Modified: llvm/trunk/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp?rev=371936&r1=371935&r2=371936&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp Sun Sep 15 09:44:35 2019
@@ -1092,7 +1092,7 @@ bool Vectorizer::vectorizeLoadChain(
   LoadInst *L0 = cast<LoadInst>(Chain[0]);
 
   // If the vector has an int element, default to int for the whole load.
-  Type *LoadTy;
+  Type *LoadTy = nullptr;
   for (const auto &V : Chain) {
     LoadTy = cast<LoadInst>(V)->getType();
     if (LoadTy->isIntOrIntVectorTy())
@@ -1104,6 +1104,7 @@ bool Vectorizer::vectorizeLoadChain(
       break;
     }
   }
+  assert(LoadTy && "Can't determine LoadInst type from chain");
 
   unsigned Sz = DL.getTypeSizeInBits(LoadTy);
   unsigned AS = L0->getPointerAddressSpace();