Revert r82404, it is causing a bootstrap miscompile. This is very very
scary, as it indicates a lurking bug. yay.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82411 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/MemoryDependenceAnalysis.cpp b/lib/Analysis/MemoryDependenceAnalysis.cpp
index d5db2ed..97b791c 100644
--- a/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -521,13 +521,6 @@
const Type *EltTy = cast<PointerType>(Pointer->getType())->getElementType();
uint64_t PointeeSize = AA->getTypeStoreSize(EltTy);
- // If Pointer is a bitcast instruction, chomp through to the pointee since
- // they are must alias. This increases the effectiveness of caching by
- // finding more equivalences, avoids having to phi translate the bitcast, and
- // avoids conflicts where we are looking for two "different" values in the
- // same block when they are really just must aliases.
- Pointer = Pointer->stripPointerCasts();
-
// This is the set of blocks we've inspected, and the pointer we consider in
// each block. Because of critical edges, we currently bail out if querying
// a block with multiple different pointers. This can happen during PHI
@@ -667,6 +660,7 @@
SmallVectorImpl<NonLocalDepEntry> &Result,
DenseMap<BasicBlock*, Value*> &Visited,
bool SkipFirstBlock) {
+
// Look up the cached info for Pointer.
ValueIsLoadPair CacheKey(Pointer, isLoad);
@@ -799,13 +793,6 @@
BasicBlock *Pred = *PI;
Value *PredPtr = PtrPHI->getIncomingValueForBlock(Pred);
- // If Pointer is a bitcast instruction, chomp through to the pointee since
- // they are must alias. This increases the effectiveness of caching by
- // finding more equivalences, avoids having to phi translate the bitcast, and
- // avoids conflicts where we are looking for two "different" values in the
- // same block when they are really just must aliases.
- PredPtr = PredPtr->stripPointerCasts();
-
// Check to see if we have already visited this pred block with another
// pointer. If so, we can't do this lookup. This failure can occur
// with PHI translation when a critical edge exists and the PHI node in