[PATCH] D38793: [CodeGen] EmitLoadOfReference() to generate TBAA info along with LValue base info

[Ivan A. Kosarev via Phabricator via cfe-commits]

kosarev created this revision.
kosarev added a project: clang.

Repository:
  rL LLVM

https://reviews.llvm.org/D38793

Files:
  CodeGen/CGExpr.cpp
  CodeGen/CodeGenFunction.h


Index: CodeGen/CodeGenFunction.h
===================================================================
--- CodeGen/CodeGenFunction.h
+++ CodeGen/CodeGenFunction.h
@@ -1944,7 +1944,8 @@
                                            LValueBaseInfo *BaseInfo = nullptr);
 
   Address EmitLoadOfReference(Address Ref, const ReferenceType *RefTy,
-                              LValueBaseInfo *BaseInfo = nullptr);
+                              LValueBaseInfo *BaseInfo = nullptr,
+                              TBAAAccessInfo *TBAAInfo = nullptr);
   LValue EmitLoadOfReferenceLValue(Address Ref, const ReferenceType *RefTy);
 
   Address EmitLoadOfPointer(Address Ptr, const PointerType *PtrTy,
Index: CodeGen/CGExpr.cpp
===================================================================
--- CodeGen/CGExpr.cpp
+++ CodeGen/CGExpr.cpp
@@ -2149,18 +2149,22 @@
 
 Address CodeGenFunction::EmitLoadOfReference(Address Addr,
                                              const ReferenceType *RefTy,
-                                             LValueBaseInfo *BaseInfo) {
+                                             LValueBaseInfo *BaseInfo,
+                                             TBAAAccessInfo *TBAAInfo) {
+  if (TBAAInfo)
+    *TBAAInfo = CGM.getTBAAAccessInfo(RefTy->getPointeeType());
+
   llvm::Value *Ptr = Builder.CreateLoad(Addr);
   return Address(Ptr, getNaturalTypeAlignment(RefTy->getPointeeType(),
                                               BaseInfo, /*forPointee*/ true));
 }
 
 LValue CodeGenFunction::EmitLoadOfReferenceLValue(Address RefAddr,
                                                   const ReferenceType *RefTy) {
   LValueBaseInfo BaseInfo;
-  Address Addr = EmitLoadOfReference(RefAddr, RefTy, &BaseInfo);
-  return MakeAddrLValue(Addr, RefTy->getPointeeType(), BaseInfo,
-                        CGM.getTBAAAccessInfo(RefTy->getPointeeType()));
+  TBAAAccessInfo TBAAInfo;
+  Address Addr = EmitLoadOfReference(RefAddr, RefTy, &BaseInfo, &TBAAInfo);
+  return MakeAddrLValue(Addr, RefTy->getPointeeType(), BaseInfo, TBAAInfo);
 }
 
 Address CodeGenFunction::EmitLoadOfPointer(Address Ptr,



Index: CodeGen/CodeGenFunction.h
===================================================================
--- CodeGen/CodeGenFunction.h
+++ CodeGen/CodeGenFunction.h
@@ -1944,7 +1944,8 @@
                                            LValueBaseInfo *BaseInfo = nullptr);
 
   Address EmitLoadOfReference(Address Ref, const ReferenceType *RefTy,
-                              LValueBaseInfo *BaseInfo = nullptr);
+                              LValueBaseInfo *BaseInfo = nullptr,
+                              TBAAAccessInfo *TBAAInfo = nullptr);
   LValue EmitLoadOfReferenceLValue(Address Ref, const ReferenceType *RefTy);
 
   Address EmitLoadOfPointer(Address Ptr, const PointerType *PtrTy,
Index: CodeGen/CGExpr.cpp
===================================================================
--- CodeGen/CGExpr.cpp
+++ CodeGen/CGExpr.cpp
@@ -2149,18 +2149,22 @@
 
 Address CodeGenFunction::EmitLoadOfReference(Address Addr,
                                              const ReferenceType *RefTy,
-                                             LValueBaseInfo *BaseInfo) {
+                                             LValueBaseInfo *BaseInfo,
+                                             TBAAAccessInfo *TBAAInfo) {
+  if (TBAAInfo)
+    *TBAAInfo = CGM.getTBAAAccessInfo(RefTy->getPointeeType());
+
   llvm::Value *Ptr = Builder.CreateLoad(Addr);
   return Address(Ptr, getNaturalTypeAlignment(RefTy->getPointeeType(),
                                               BaseInfo, /*forPointee*/ true));
 }
 
 LValue CodeGenFunction::EmitLoadOfReferenceLValue(Address RefAddr,
                                                   const ReferenceType *RefTy) {
   LValueBaseInfo BaseInfo;
-  Address Addr = EmitLoadOfReference(RefAddr, RefTy, &BaseInfo);
-  return MakeAddrLValue(Addr, RefTy->getPointeeType(), BaseInfo,
-                        CGM.getTBAAAccessInfo(RefTy->getPointeeType()));
+  TBAAAccessInfo TBAAInfo;
+  Address Addr = EmitLoadOfReference(RefAddr, RefTy, &BaseInfo, &TBAAInfo);
+  return MakeAddrLValue(Addr, RefTy->getPointeeType(), BaseInfo, TBAAInfo);
 }
 
 Address CodeGenFunction::EmitLoadOfPointer(Address Ptr,

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