From: Bill Wendling <isanbard@gmail.com>
Date: Wed, 17 Oct 2012 23:54:19 +0000 (+0000)
Subject: Check that the operand of the GEP is not the GEP itself. This occurred during an... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=73f75cf2007c3271b2d551c399a78689030c95eb;p=oota-llvm.git

Check that the operand of the GEP is not the GEP itself. This occurred during an LTO build of LLVM.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166157 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index fd629b485aa..88ad5b11cbe 100644
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -1371,9 +1371,11 @@ void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
   Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
 
   Assert1(isa<PointerType>(TargetTy),
-    "GEP base pointer is not a vector or a vector of pointers", &GEP);
+          "GEP base pointer is not a vector or a vector of pointers", &GEP);
   Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
           "GEP into unsized type!", &GEP);
+  Assert1(GEP.getPointerOperand() != &GEP,
+          "GEP is using the result as the pointer operand!", &GEP);
 
   SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
   Type *ElTy =