[LLVMdev] null pointer check missing in LoopInfo

[Sameer D. Sahasrabuddhe]

In LLVM 1.5, the function isLoopHeader fails to check for a null
pointer after calling getLoopFor. Dunno if this is fixed in CVS, but
attaching a patch anyway ...

Sameer.
-- 
Research Scholar, KReSIT, IIT Bombay
http://www.it.iitb.ac.in/~sameerds/
-------------- next part --------------
--- LoopInfo.h	2005-06-29 17:42:43.000000000 +0530
+++ llvm/include/llvm/Analysis/LoopInfo.h	2005-06-29 17:59:35.000000000 +0530
@@ -250,7 +250,8 @@
 
   // isLoopHeader - True if the block is a loop header node
   bool isLoopHeader(BasicBlock *BB) const {
-    return getLoopFor(BB)->getHeader() == BB;
+    const Loop *L = getLoopFor(BB);
+    return L ? L->getHeader() == BB : false;
   }
 
   /// runOnFunction - Calculate the natural loop information.