From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sun, 15 Sep 2019 16:44:35 +0000 (+0000)
Subject: [LoadStoreVectorizer] vectorizeLoadChain - ensure we find a valid Type down the load... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=81bcd7a8580b03cbbc9e06bd126d64eb3c0002a7;p=llvm

[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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371936 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp b/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
index 5f97740a9c6..f44976c723e 100644
--- a/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
+++ b/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
@@ -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();