[llvm] bd1dc6a - Fix "use of uninitialized variable" static analyzer warnings. NFCI.

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2020-01-07T10:55:37Z
New Revision: bd1dc6a3eb801b0b6eadb569557a8bba6f7a4b9c

URL: https://github.com/llvm/llvm-project/commit/bd1dc6a3eb801b0b6eadb569557a8bba6f7a4b9c
DIFF: https://github.com/llvm/llvm-project/commit/bd1dc6a3eb801b0b6eadb569557a8bba6f7a4b9c.diff

LOG: Fix "use of uninitialized variable" static analyzer warnings. NFCI.

Added: 
    

Modified: 
    llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 645bcad9ee69..e5f7968d9326 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -1780,7 +1780,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     IRBuilder<> IRB(I.getNextNode());
     Type *ShadowTy = getShadowTy(&I);
     Value *Addr = I.getPointerOperand();
-    Value *ShadowPtr, *OriginPtr;
+    Value *ShadowPtr = nullptr, *OriginPtr = nullptr;
     const Align Alignment = assumeAligned(I.getAlignment());
     if (PropagateShadow) {
       std::tie(ShadowPtr, OriginPtr) =
@@ -2476,7 +2476,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     Value *Addr = I.getArgOperand(0);
 
     Type *ShadowTy = getShadowTy(&I);
-    Value *ShadowPtr, *OriginPtr;
+    Value *ShadowPtr = nullptr, *OriginPtr = nullptr;
     if (PropagateShadow) {
       // We don't know the pointer alignment (could be unaligned SSE load!).
       // Have to assume to worst case.