[llvm-commits] CVS: llvm/lib/Analysis/BasicAliasAnalysis.cpp

[Chris Lattner]

Changes in directory llvm/lib/Analysis:

BasicAliasAnalysis.cpp updated: 1.3 -> 1.4

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Log message:

Fix a problem with negative indexes


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Diffs of the changes:

Index: llvm/lib/Analysis/BasicAliasAnalysis.cpp
diff -u llvm/lib/Analysis/BasicAliasAnalysis.cpp:1.3 llvm/lib/Analysis/BasicAliasAnalysis.cpp:1.4
--- llvm/lib/Analysis/BasicAliasAnalysis.cpp:1.3	Wed Feb 26 15:57:23 2003
+++ llvm/lib/Analysis/BasicAliasAnalysis.cpp	Sun Mar  2 17:43:34 2003
@@ -301,11 +301,11 @@
     }
   }
   
-  unsigned Offset1 = getTargetData().getIndexedOffset(GEPPointerTy, Indices1);
-  unsigned Offset2 = getTargetData().getIndexedOffset(GEPPointerTy, Indices2);
+  int Offset1 = getTargetData().getIndexedOffset(GEPPointerTy, Indices1);
+  int Offset2 = getTargetData().getIndexedOffset(GEPPointerTy, Indices2);
   assert(Offset1 < Offset2 &&"There is at least one different constant here!");
 
-  if (Offset2-Offset1 >= SizeMax) {
+  if ((unsigned)(Offset2-Offset1) >= SizeMax) {
     //std::cerr << "Determined that these two GEP's don't alias [" 
     //          << SizeMax << " bytes]: \n" << *GEP1 << *GEP2;
     return NoAlias;