[llvm-commits] [llvm] r76280 - /llvm/trunk/lib/VMCore/Constants.cpp

[Dan Gohman]

Author: djg
Date: Fri Jul 17 20:49:22 2009
New Revision: 76280

URL: http://llvm.org/viewvc/llvm-project?rev=76280&view=rev
Log:
Make GetElementPtr ConstantExprs default to having no pointer overflow.

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

Modified: llvm/trunk/lib/VMCore/Constants.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Constants.cpp?rev=76280&r1=76279&r2=76280&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/Constants.cpp (original)
+++ llvm/trunk/lib/VMCore/Constants.cpp Fri Jul 17 20:49:22 2009
@@ -18,6 +18,7 @@
 #include "llvm/Instructions.h"
 #include "llvm/MDNode.h"
 #include "llvm/Module.h"
+#include "llvm/Operator.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringMap.h"
@@ -474,8 +475,11 @@
   static GetElementPtrConstantExpr *Create(Constant *C,
                                            const std::vector<Constant*>&IdxList,
                                            const Type *DestTy) {
-    return new(IdxList.size() + 1)
+    GetElementPtrConstantExpr *Result = new(IdxList.size() + 1)
       GetElementPtrConstantExpr(C, IdxList, DestTy);
+    // Getelementptr defaults to having no pointer overflow.
+    cast<GEPOperator>(Result)->setHasNoPointerOverflow(true);
+    return Result;
   }
   /// Transparently provide more efficient getOperand methods.
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);