[msan] Handle vector manipulation instructions.

Handle insertelement, extractelement, shufflevector.

llvm-svn: 168889

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

@@ -743,6 +743,31 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
       IRB.CreateAlignedStore(getOrigin(Val), getOriginPtr(Addr, IRB), I.getAlignment());
   }
 
+  // Vector manipulation.
+  void visitExtractElementInst(ExtractElementInst &I) {
+    insertCheck(I.getOperand(1), &I);
+    IRBuilder<> IRB(&I);
+    setShadow(&I, IRB.CreateExtractElement(getShadow(&I, 0), I.getOperand(1),
+              "_msprop"));
+    setOrigin(&I, getOrigin(&I, 0));
+  }
+
+  void visitInsertElementInst(InsertElementInst &I) {
+    insertCheck(I.getOperand(2), &I);
+    IRBuilder<> IRB(&I);
+    setShadow(&I, IRB.CreateInsertElement(getShadow(&I, 0), getShadow(&I, 1),
+              I.getOperand(2), "_msprop"));
+    setOriginForNaryOp(I);
+  }
+
+  void visitShuffleVectorInst(ShuffleVectorInst &I) {
+    insertCheck(I.getOperand(2), &I);
+    IRBuilder<> IRB(&I);
+    setShadow(&I, IRB.CreateShuffleVector(getShadow(&I, 0), getShadow(&I, 1),
+              I.getOperand(2), "_msprop"));
+    setOriginForNaryOp(I);
+  }
+
   // Casts.
   void visitSExtInst(SExtInst &I) {
     IRBuilder<> IRB(&I);