Index: llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -1918,25 +1918,6 @@
     VAHelper->visitVACopyInst(I);
   }
 
-  enum IntrinsicKind {
-    IK_DoesNotAccessMemory,
-    IK_OnlyReadsMemory,
-    IK_WritesMemory
-  };
-
-  static IntrinsicKind getIntrinsicKind(Intrinsic::ID iid) {
-    const int FMRB_DoesNotAccessMemory = IK_DoesNotAccessMemory;
-    const int FMRB_OnlyReadsArgumentPointees = IK_OnlyReadsMemory;
-    const int FMRB_OnlyReadsMemory = IK_OnlyReadsMemory;
-    const int FMRB_OnlyAccessesArgumentPointees = IK_WritesMemory;
-    const int FMRB_UnknownModRefBehavior = IK_WritesMemory;
-#define GET_INTRINSIC_MODREF_BEHAVIOR
-#define FunctionModRefBehavior IntrinsicKind
-#include "llvm/IR/Intrinsics.gen"
-#undef FunctionModRefBehavior
-#undef GET_INTRINSIC_MODREF_BEHAVIOR
-  }
-
   /// \brief Handle vector store-like intrinsics.
   ///
   /// Instrument intrinsics that look like a simple SIMD store: writes memory,
@@ -2036,17 +2017,11 @@
     if (NumArgOperands == 0)
       return false;
 
-    Intrinsic::ID iid = I.getIntrinsicID();
-    IntrinsicKind IK = getIntrinsicKind(iid);
-    bool OnlyReadsMemory = IK == IK_OnlyReadsMemory;
-    bool WritesMemory = IK == IK_WritesMemory;
-    assert(!(OnlyReadsMemory && WritesMemory));
-
     if (NumArgOperands == 2 &&
         I.getArgOperand(0)->getType()->isPointerTy() &&
         I.getArgOperand(1)->getType()->isVectorTy() &&
         I.getType()->isVoidTy() &&
-        WritesMemory) {
+        !I.onlyReadsMemory()) {
       // This looks like a vector store.
       return handleVectorStoreIntrinsic(I);
     }
@@ -2054,12 +2029,12 @@
     if (NumArgOperands == 1 &&
         I.getArgOperand(0)->getType()->isPointerTy() &&
         I.getType()->isVectorTy() &&
-        OnlyReadsMemory) {
+        I.onlyReadsMemory()) {
       // This looks like a vector load.
       return handleVectorLoadIntrinsic(I);
     }
 
-    if (!OnlyReadsMemory && !WritesMemory)
+    if (I.doesNotAccessMemory())
       if (maybeHandleSimpleNomemIntrinsic(I))
         return true;