[llvm-commits] [llvm] r50878 - /llvm/trunk/lib/VMCore/Verifier.cpp

[Anton Korobeynikov]

Author: asl
Date: Thu May  8 18:11:06 2008
New Revision: 50878

URL: http://llvm.org/viewvc/llvm-project?rev=50878&view=rev
Log:
Check for validity of aliasee pointer before dereference.

Modified:
    llvm/trunk/lib/VMCore/Verifier.cpp

Modified: llvm/trunk/lib/VMCore/Verifier.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Verifier.cpp?rev=50878&r1=50877&r2=50878&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/Verifier.cpp (original)
+++ llvm/trunk/lib/VMCore/Verifier.cpp Thu May  8 18:11:06 2008
@@ -367,9 +367,11 @@
   Assert1(GA.hasExternalLinkage() || GA.hasInternalLinkage() ||
           GA.hasWeakLinkage(),
           "Alias should have external or external weak linkage!", &GA);
+  Assert1(GA.getAliasee(),
+          "Aliasee cannot be NULL!", &GA);
   Assert1(GA.getType() == GA.getAliasee()->getType(),
           "Alias and aliasee types should match!", &GA);
-  
+
   if (!isa<GlobalValue>(GA.getAliasee())) {
     const ConstantExpr *CE = dyn_cast<ConstantExpr>(GA.getAliasee());
     Assert1(CE && CE->getOpcode() == Instruction::BitCast &&