PNaCl: Add ReplacePtrsWithInts pass for stripping out pointer types

lib/IR/Constants.cpp

 //===-- Constants.cpp - Implement Constant nodes --------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the Constant* classes.
@@ skipping 1353 matching lines @@
   destroyConstantImpl();
 }
 
 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
   // This could be replacing either the Basic Block or the Function.  In either
   // case, we have to remove the map entry.
   Function *NewF = getFunction();
   BasicBlock *NewBB = getBasicBlock();
 
   if (U == &Op<0>())
-    NewF = cast<Function>(To);
+    NewF = cast<Function>(To->stripPointerCasts());

[Derek Schuff, 2013/05/17 23:16:05]

LOCALMOD with comment?

[Mark Seaborn, 2013/05/20 15:08:12]

Done: LOCALMOD comment added.

   else
     NewBB = cast<BasicBlock>(To);
 
   // See if the 'new' entry already exists, if not, just update this in place
   // and return early.
   BlockAddress *&NewBA =
     getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
   if (NewBA == 0) {
     getBasicBlock()->AdjustBlockAddressRefCount(-1);
 
@@ skipping 1388 matching lines @@
       BO->setHasNoUnsignedWrap(SubclassOptionalData &
                                OverflowingBinaryOperator::NoUnsignedWrap);
       BO->setHasNoSignedWrap(SubclassOptionalData &
                              OverflowingBinaryOperator::NoSignedWrap);
     }
     if (isa<PossiblyExactOperator>(BO))
       BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);
     return BO;
   }
 }