[CodeGen] Avoid some pointer element type accesses

Author: nikic

clang/lib/CodeGen/CGCall.cpp

@@ -3513,8 +3513,7 @@ void CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI,
       --EI;
       llvm::Value *ArgStruct = &*EI;
       llvm::Value *SRet = Builder.CreateStructGEP(
-          EI->getType()->getPointerElementType(), ArgStruct,
-          RetAI.getInAllocaFieldIndex());
+          FI.getArgStruct(), ArgStruct, RetAI.getInAllocaFieldIndex());
       llvm::Type *Ty =
           cast<llvm::GetElementPtrInst>(SRet)->getResultElementType();
       RV = Builder.CreateAlignedLoad(Ty, SRet, getPointerAlign(), "sret");

clang/lib/CodeGen/CGOpenMPRuntime.cpp

@@ -9990,6 +9990,7 @@ void CGOpenMPRuntime::emitUserDefinedMapper(const OMPDeclareMapperDecl *D,
       cast<VarDecl>(cast<DeclRefExpr>(D->getMapperVarRef())->getDecl());
   SourceLocation Loc = D->getLocation();
   CharUnits ElementSize = C.getTypeSizeInChars(Ty);
+  llvm::Type *ElemTy = CGM.getTypes().ConvertTypeForMem(Ty);
 
   // Prepare mapper function arguments and attributes.
   ImplicitParamDecl HandleArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
@@ -10044,8 +10045,7 @@ void CGOpenMPRuntime::emitUserDefinedMapper(const OMPDeclareMapperDecl *D,
       Size, MapperCGF.Builder.getInt64(ElementSize.getQuantity()));
   llvm::Value *PtrBegin = MapperCGF.Builder.CreateBitCast(
       BeginIn, CGM.getTypes().ConvertTypeForMem(PtrTy));
-  llvm::Value *PtrEnd = MapperCGF.Builder.CreateGEP(
-      PtrBegin->getType()->getPointerElementType(), PtrBegin, Size);
+  llvm::Value *PtrEnd = MapperCGF.Builder.CreateGEP(ElemTy, PtrBegin, Size);
   llvm::Value *MapType = MapperCGF.EmitLoadOfScalar(
       MapperCGF.GetAddrOfLocalVar(&TypeArg), /*Volatile=*/false,
       C.getPointerType(Int64Ty), Loc);
@@ -10077,10 +10077,10 @@ void CGOpenMPRuntime::emitUserDefinedMapper(const OMPDeclareMapperDecl *D,
   llvm::PHINode *PtrPHI = MapperCGF.Builder.CreatePHI(
       PtrBegin->getType(), 2, "omp.arraymap.ptrcurrent");
   PtrPHI->addIncoming(PtrBegin, EntryBB);
-  Address PtrCurrent =
-      Address::deprecated(PtrPHI, MapperCGF.GetAddrOfLocalVar(&BeginArg)
-                                      .getAlignment()
-                                      .alignmentOfArrayElement(ElementSize));
+  Address PtrCurrent(PtrPHI, ElemTy,
+                     MapperCGF.GetAddrOfLocalVar(&BeginArg)
+                         .getAlignment()
+                         .alignmentOfArrayElement(ElementSize));
   // Privatize the declared variable of mapper to be the current array element.
   CodeGenFunction::OMPPrivateScope Scope(MapperCGF);
   Scope.addPrivate(MapperVarDecl, PtrCurrent);
@@ -10202,7 +10202,6 @@ void CGOpenMPRuntime::emitUserDefinedMapper(const OMPDeclareMapperDecl *D,
 
   // Update the pointer to point to the next element that needs to be mapped,
   // and check whether we have mapped all elements.
-  llvm::Type *ElemTy = PtrPHI->getType()->getPointerElementType();
   llvm::Value *PtrNext = MapperCGF.Builder.CreateConstGEP1_32(
       ElemTy, PtrPHI, /*Idx0=*/1, "omp.arraymap.next");
   PtrPHI->addIncoming(PtrNext, LastBB);

clang/lib/CodeGen/CodeGenFunction.cpp

@@ -1104,7 +1104,7 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
     llvm::Function::arg_iterator EI = CurFn->arg_end();
     --EI;
     llvm::Value *Addr = Builder.CreateStructGEP(
-        EI->getType()->getPointerElementType(), &*EI, Idx);
+        CurFnInfo->getArgStruct(), &*EI, Idx);
     llvm::Type *Ty =
         cast<llvm::GetElementPtrInst>(Addr)->getResultElementType();
     ReturnValuePointer = Address(Addr, Ty, getPointerAlign());