OpaquePtr: add Type parameter to Loads analysis API.

This makes the functions in Loads.h require a type to be specified
independently of the pointer Value so that when pointers have no structure
other than address-space, it can still do its job.

Most callers had an obvious memory operation handy to provide this type, but a
SROA and ArgumentPromotion were doing more complicated analysis. They get
updated to merge the properties of the various instructions they were
considering.

llvm-svn: 365468

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index cf5e903..adcb0b3 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4004,7 +4004,8 @@ void SelectionDAGBuilder::visitLoad(const LoadInst &I) {
   bool isVolatile = I.isVolatile();
   bool isNonTemporal = I.getMetadata(LLVMContext::MD_nontemporal) != nullptr;
   bool isInvariant = I.getMetadata(LLVMContext::MD_invariant_load) != nullptr;
-  bool isDereferenceable = isDereferenceablePointer(SV, DAG.getDataLayout());
+  bool isDereferenceable =
+      isDereferenceablePointer(SV, I.getType(), DAG.getDataLayout());
   unsigned Alignment = I.getAlignment();
 
   AAMDNodes AAInfo;
@@ -4629,7 +4630,8 @@ void SelectionDAGBuilder::visitAtomicLoad(const LoadInst &I) {
     Flags |= MachineMemOperand::MOVolatile;
   if (I.getMetadata(LLVMContext::MD_invariant_load) != nullptr)
     Flags |= MachineMemOperand::MOInvariant;
-  if (isDereferenceablePointer(I.getPointerOperand(), DAG.getDataLayout()))
+  if (isDereferenceablePointer(I.getPointerOperand(), I.getType(),
+                               DAG.getDataLayout()))
     Flags |= MachineMemOperand::MODereferenceable;
 
   Flags |= TLI.getMMOFlags(I);