Permit the IntPtrTy argument to isEliminableCastPair to be null,

to help support use when TargetData is not available.

llvm-svn: 76675

diff --git a/llvm/include/llvm/InstrTypes.h b/llvm/include/llvm/InstrTypes.h
index 1ee2a4b..c3c48af 100644 (file)
--- a/llvm/include/llvm/InstrTypes.h
+++ b/llvm/include/llvm/InstrTypes.h
@@ -479,7 +479,7 @@ public:
     const Type *SrcTy, ///< SrcTy of 1st cast
     const Type *MidTy, ///< DstTy of 1st cast & SrcTy of 2nd cast
     const Type *DstTy, ///< DstTy of 2nd cast
-    const Type *IntPtrTy ///< Integer type corresponding to Ptr types
+    const Type *IntPtrTy ///< Integer type corresponding to Ptr types, or null
   );
 
   /// @brief Return the opcode of this CastInst

diff --git a/llvm/lib/VMCore/Instructions.cpp b/llvm/lib/VMCore/Instructions.cpp
index e04d54c..5e5ce64 100644 (file)
--- a/llvm/lib/VMCore/Instructions.cpp
+++ b/llvm/lib/VMCore/Instructions.cpp
@@ -1890,6 +1890,8 @@ unsigned CastInst::isEliminableCastPair(
       return 0;
     case 7: { 
       // ptrtoint, inttoptr -> bitcast (ptr -> ptr) if int size is >= ptr size
+      if (!IntPtrTy)
+        return 0;
       unsigned PtrSize = IntPtrTy->getScalarSizeInBits();
       unsigned MidSize = MidTy->getScalarSizeInBits();
       if (MidSize >= PtrSize)
@@ -1929,6 +1931,8 @@ unsigned CastInst::isEliminableCastPair(
       return 0;
     case 13: {
       // inttoptr, ptrtoint -> bitcast if SrcSize<=PtrSize and SrcSize==DstSize
+      if (!IntPtrTy)
+        return 0;
       unsigned PtrSize = IntPtrTy->getScalarSizeInBits();
       unsigned SrcSize = SrcTy->getScalarSizeInBits();
       unsigned DstSize = DstTy->getScalarSizeInBits();