Import LLVM 6.0.1 release including clang, lld and lldb.

"where is the kaboom?" deraadt@

1 files changed, 3 insertions, 4 deletions

diff --git a/gnu/llvm/lib/Analysis/Loads.cpp b/gnu/llvm/lib/Analysis/Loads.cpp
index 591b0fc481d..834727c9224 100644
--- a/gnu/llvm/lib/Analysis/Loads.cpp
+++ b/gnu/llvm/lib/Analysis/Loads.cpp
@@ -72,7 +72,7 @@ static bool isDereferenceableAndAlignedPointer(
                         V->getPointerDereferenceableBytes(DL, CheckForNonNull));
   if (KnownDerefBytes.getBoolValue()) {
     if (KnownDerefBytes.uge(Size))
-      if (!CheckForNonNull || isKnownNonNullAt(V, CtxI, DT))
+      if (!CheckForNonNull || isKnownNonZero(V, DL, 0, nullptr, CtxI, DT))
         return isAligned(V, Align, DL);
   }
 
@@ -414,7 +414,7 @@ Value *llvm::FindAvailablePtrLoadStore(Value *Ptr, Type *AccessTy,
 
       // If we have alias analysis and it says the store won't modify the loaded
       // value, ignore the store.
-      if (AA && (AA->getModRefInfo(SI, StrippedPtr, AccessSize) & MRI_Mod) == 0)
+      if (AA && !isModSet(AA->getModRefInfo(SI, StrippedPtr, AccessSize)))
         continue;
 
       // Otherwise the store that may or may not alias the pointer, bail out.
@@ -426,8 +426,7 @@ Value *llvm::FindAvailablePtrLoadStore(Value *Ptr, Type *AccessTy,
     if (Inst->mayWriteToMemory()) {
       // If alias analysis claims that it really won't modify the load,
       // ignore it.
-      if (AA &&
-          (AA->getModRefInfo(Inst, StrippedPtr, AccessSize) & MRI_Mod) == 0)
+      if (AA && !isModSet(AA->getModRefInfo(Inst, StrippedPtr, AccessSize)))
         continue;
 
       // May modify the pointer, bail out.