[llvm] r188140 - Teach ValueTracking about address spaces

[Matt Arsenault]

Author: arsenm
Date: Sat Aug 10 12:34:08 2013
New Revision: 188140

URL: http://llvm.org/viewvc/llvm-project?rev=188140&view=rev
Log:
Teach ValueTracking about address spaces

Modified:
    llvm/trunk/lib/Analysis/ValueTracking.cpp

Modified: llvm/trunk/lib/Analysis/ValueTracking.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ValueTracking.cpp?rev=188140&r1=188139&r2=188140&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ValueTracking.cpp (original)
+++ llvm/trunk/lib/Analysis/ValueTracking.cpp Sat Aug 10 12:34:08 2013
@@ -39,8 +39,8 @@ const unsigned MaxDepth = 6;
 static unsigned getBitWidth(Type *Ty, const DataLayout *TD) {
   if (unsigned BitWidth = Ty->getScalarSizeInBits())
     return BitWidth;
-  assert(isa<PointerType>(Ty) && "Expected a pointer type!");
-  return TD ? TD->getPointerSizeInBits() : 0;
+
+  return TD ? TD->getPointerTypeSizeInBits(Ty) : 0;
 }
 
 static void ComputeMaskedBitsAddSub(bool Add, Value *Op0, Value *Op1, bool NSW,
@@ -1704,20 +1704,24 @@ Value *llvm::FindInsertedValue(Value *V,
 /// it can be expressed as a base pointer plus a constant offset.  Return the
 /// base and offset to the caller.
 Value *llvm::GetPointerBaseWithConstantOffset(Value *Ptr, int64_t &Offset,
-                                              const DataLayout *TD) {
+                                              const DataLayout *DL) {
   // Without DataLayout, conservatively assume 64-bit offsets, which is
   // the widest we support.
-  unsigned BitWidth = TD ? TD->getPointerSizeInBits() : 64;
+  unsigned BitWidth = DL ? DL->getPointerTypeSizeInBits(Ptr->getType()) : 64;
   APInt ByteOffset(BitWidth, 0);
   while (1) {
     if (Ptr->getType()->isVectorTy())
       break;
 
     if (GEPOperator *GEP = dyn_cast<GEPOperator>(Ptr)) {
-      APInt GEPOffset(BitWidth, 0);
-      if (TD && !GEP->accumulateConstantOffset(*TD, GEPOffset))
-        break;
-      ByteOffset += GEPOffset;
+      if (DL) {
+        APInt GEPOffset(BitWidth, 0);
+        if (!GEP->accumulateConstantOffset(*DL, GEPOffset))
+          break;
+
+        ByteOffset += GEPOffset;
+      }
+
       Ptr = GEP->getPointerOperand();
     } else if (Operator::getOpcode(Ptr) == Instruction::BitCast) {
       Ptr = cast<Operator>(Ptr)->getOperand(0);