diff --git a/clang/lib/CodeGen/CGAtomic.cpp b/clang/lib/CodeGen/CGAtomic.cpp
--- a/clang/lib/CodeGen/CGAtomic.cpp
+++ b/clang/lib/CodeGen/CGAtomic.cpp
@@ -201,7 +201,7 @@
       assert(LVal.isSimple());
       Address addr = getAtomicAddress();
       if (hasPadding())
-        addr = CGF.Builder.CreateStructGEP(addr, 0, CharUnits());
+        addr = CGF.Builder.CreateStructGEP(addr, 0);
 
       return LValue::MakeAddr(addr, getValueType(), CGF.getContext(),
                               LVal.getBaseInfo(), LVal.getTBAAInfo());
@@ -1356,7 +1356,7 @@
 
     // Drill into the padding structure if we have one.
     if (hasPadding())
-      addr = CGF.Builder.CreateStructGEP(addr, 0, CharUnits());
+      addr = CGF.Builder.CreateStructGEP(addr, 0);
 
     // Otherwise, just convert the temporary to an r-value using the
     // normal conversion routine.
diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -836,9 +836,8 @@
     }
 
     // GEP down to the address.
-    Address addr = CGF.Builder.CreateStructGEP(blockInfo.LocalAddress,
-                                               capture.getIndex(),
-                                               capture.getOffset());
+    Address addr =
+        CGF.Builder.CreateStructGEP(blockInfo.LocalAddress, capture.getIndex());
 
     // We can use that GEP as the dominating IP.
     if (!blockInfo.DominatingIP)
@@ -975,27 +974,24 @@
       flags |= BLOCK_IS_NOESCAPE | BLOCK_IS_GLOBAL;
   }
 
-  auto projectField =
-    [&](unsigned index, CharUnits offset, const Twine &name) -> Address {
-      return Builder.CreateStructGEP(blockAddr, index, offset, name);
-    };
-  auto storeField =
-    [&](llvm::Value *value, unsigned index, CharUnits offset,
-        const Twine &name) {
-      Builder.CreateStore(value, projectField(index, offset, name));
-    };
+  auto projectField = [&](unsigned index, const Twine &name) -> Address {
+    return Builder.CreateStructGEP(blockAddr, index, name);
+  };
+  auto storeField = [&](llvm::Value *value, unsigned index, const Twine &name) {
+    Builder.CreateStore(value, projectField(index, name));
+  };
 
   // Initialize the block header.
   {
     // We assume all the header fields are densely packed.
     unsigned index = 0;
     CharUnits offset;
-    auto addHeaderField =
-      [&](llvm::Value *value, CharUnits size, const Twine &name) {
-        storeField(value, index, offset, name);
-        offset += size;
-        index++;
-      };
+    auto addHeaderField = [&](llvm::Value *value, CharUnits size,
+                              const Twine &name) {
+      storeField(value, index, name);
+      offset += size;
+      index++;
+    };
 
     if (!IsOpenCL) {
       addHeaderField(isa, getPointerSize(), "block.isa");
@@ -1031,8 +1027,8 @@
 
   // First, 'this'.
   if (blockDecl->capturesCXXThis()) {
-    Address addr = projectField(blockInfo.CXXThisIndex, blockInfo.CXXThisOffset,
-                                "block.captured-this.addr");
+    Address addr =
+        projectField(blockInfo.CXXThisIndex, "block.captured-this.addr");
     Builder.CreateStore(LoadCXXThis(), addr);
   }
 
@@ -1048,8 +1044,7 @@
 
     // This will be a [[type]]*, except that a byref entry will just be
     // an i8**.
-    Address blockField =
-      projectField(capture.getIndex(), capture.getOffset(), "block.captured");
+    Address blockField = projectField(capture.getIndex(), "block.captured");
 
     // Compute the address of the thing we're going to move into the
     // block literal.
@@ -1068,7 +1063,6 @@
         // This is a [[type]]*, except that a byref entry will just be an i8**.
         src = Builder.CreateStructGEP(LoadBlockStruct(),
                                       enclosingCapture.getIndex(),
-                                      enclosingCapture.getOffset(),
                                       "block.capture.addr");
       } else {
         auto I = LocalDeclMap.find(variable);
@@ -1330,9 +1324,8 @@
   // Handle constant captures.
   if (capture.isConstant()) return LocalDeclMap.find(variable)->second;
 
-  Address addr =
-    Builder.CreateStructGEP(LoadBlockStruct(), capture.getIndex(),
-                            capture.getOffset(), "block.capture.addr");
+  Address addr = Builder.CreateStructGEP(LoadBlockStruct(), capture.getIndex(),
+                                         "block.capture.addr");
 
   if (variable->isEscapingByref()) {
     // addr should be a void** right now.  Load, then cast the result
@@ -1615,9 +1608,8 @@
   // If we have a C++ 'this' reference, go ahead and force it into
   // existence now.
   if (blockDecl->capturesCXXThis()) {
-    Address addr =
-      Builder.CreateStructGEP(LoadBlockStruct(), blockInfo.CXXThisIndex,
-                              blockInfo.CXXThisOffset, "block.captured-this");
+    Address addr = Builder.CreateStructGEP(
+        LoadBlockStruct(), blockInfo.CXXThisIndex, "block.captured-this");
     CXXThisValue = Builder.CreateLoad(addr, "this");
   }
 
@@ -2060,8 +2052,8 @@
     BlockFieldFlags flags = CopiedCapture.CopyFlags;
 
     unsigned index = capture.getIndex();
-    Address srcField = Builder.CreateStructGEP(src, index, capture.getOffset());
-    Address dstField = Builder.CreateStructGEP(dst, index, capture.getOffset());
+    Address srcField = Builder.CreateStructGEP(src, index);
+    Address dstField = Builder.CreateStructGEP(dst, index);
 
     switch (CopiedCapture.CopyKind) {
     case BlockCaptureEntityKind::CXXRecord:
@@ -2249,8 +2241,7 @@
     const CGBlockInfo::Capture &capture = *DestroyedCapture.Capture;
     BlockFieldFlags flags = DestroyedCapture.DisposeFlags;
 
-    Address srcField =
-      Builder.CreateStructGEP(src, capture.getIndex(), capture.getOffset());
+    Address srcField = Builder.CreateStructGEP(src, capture.getIndex());
 
     pushCaptureCleanup(DestroyedCapture.DisposeKind, srcField,
                        CI.getVariable()->getType(), flags,
@@ -2710,13 +2701,11 @@
                                                const llvm::Twine &name) {
   // Chase the forwarding address if requested.
   if (followForward) {
-    Address forwardingAddr =
-      Builder.CreateStructGEP(baseAddr, 1, getPointerSize(), "forwarding");
+    Address forwardingAddr = Builder.CreateStructGEP(baseAddr, 1, "forwarding");
     baseAddr = Address(Builder.CreateLoad(forwardingAddr), info.ByrefAlignment);
   }
 
-  return Builder.CreateStructGEP(baseAddr, info.FieldIndex,
-                                 info.FieldOffset, name);
+  return Builder.CreateStructGEP(baseAddr, info.FieldIndex, name);
 }
 
 /// BuildByrefInfo - This routine changes a __block variable declared as T x
@@ -2834,8 +2823,7 @@
   CharUnits nextHeaderOffset;
   auto storeHeaderField = [&](llvm::Value *value, CharUnits fieldSize,
                               const Twine &name) {
-    auto fieldAddr = Builder.CreateStructGEP(addr, nextHeaderIndex,
-                                             nextHeaderOffset, name);
+    auto fieldAddr = Builder.CreateStructGEP(addr, nextHeaderIndex, name);
     Builder.CreateStore(value, fieldAddr);
 
     nextHeaderIndex++;
diff --git a/clang/lib/CodeGen/CGBuilder.h b/clang/lib/CodeGen/CGBuilder.h
--- a/clang/lib/CodeGen/CGBuilder.h
+++ b/clang/lib/CodeGen/CGBuilder.h
@@ -167,33 +167,25 @@
     return Address(Ptr, Addr.getAlignment());
   }
 
+  /// Given
+  ///   %addr = {T1, T2...}* ...
+  /// produce
+  ///   %name = getelementptr inbounds %addr, i32 0, i32 index
+  ///
+  /// This API assumes that drilling into a struct like this is always an
+  /// inbounds operation.
   using CGBuilderBaseTy::CreateStructGEP;
-  Address CreateStructGEP(Address Addr, unsigned Index, CharUnits Offset,
+  Address CreateStructGEP(Address Addr, unsigned Index,
                           const llvm::Twine &Name = "") {
-#ifndef NDEBUG
     llvm::StructType *ElTy = cast<llvm::StructType>(Addr.getElementType());
     const llvm::DataLayout &DL = BB->getParent()->getParent()->getDataLayout();
-    const llvm::StructLayout *SL = DL.getStructLayout(ElTy);
-    assert(SL->getElementOffset(Index) == (uint64_t)Offset.getQuantity());
-#endif
+    const llvm::StructLayout *Layout = DL.getStructLayout(ElTy);
+    auto Offset = CharUnits::fromQuantity(Layout->getElementOffset(Index));
 
     return Address(CreateStructGEP(Addr.getElementType(),
                                    Addr.getPointer(), Index, Name),
                    Addr.getAlignment().alignmentAtOffset(Offset));
   }
-  Address CreateStructGEP(Address Addr, unsigned Index,
-                          const llvm::StructLayout *Layout,
-                          const llvm::Twine &Name = "") {
-#ifndef NDEBUG
-    llvm::StructType *ElTy = cast<llvm::StructType>(Addr.getElementType());
-    const llvm::DataLayout &DL = BB->getParent()->getParent()->getDataLayout();
-    const llvm::StructLayout *SL = DL.getStructLayout(ElTy);
-    assert(Layout == SL);
-#endif
-
-    auto Offset = CharUnits::fromQuantity(Layout->getElementOffset(Index));
-    return CreateStructGEP(Addr, Index, Offset, Name);
-  }
 
   /// Given
   ///   %addr = [n x T]* ...
@@ -203,24 +195,6 @@
   ///
   /// This API assumes that drilling into an array like this is always
   /// an inbounds operation.
-  ///
-  /// \param EltSize - the size of the type T in bytes
-  Address CreateConstArrayGEP(Address Addr, uint64_t Index, CharUnits EltSize,
-                              const llvm::Twine &Name = "") {
-#ifndef NDEBUG
-    llvm::ArrayType *ElTy = cast<llvm::ArrayType>(Addr.getElementType());
-    const llvm::DataLayout &DL = BB->getParent()->getParent()->getDataLayout();
-    assert(DL.getTypeAllocSize(ElTy->getElementType()) ==
-           (uint64_t)EltSize.getQuantity());
-#endif
-
-    return Address(CreateInBoundsGEP(Addr.getPointer(),
-                                     {getSize(CharUnits::Zero()),
-                                      getSize(Index)},
-                                     Name),
-                   Addr.getAlignment().alignmentAtOffset(Index * EltSize));
-  }
-
   Address CreateConstArrayGEP(Address Addr, uint64_t Index,
                               const llvm::Twine &Name = "") {
     llvm::ArrayType *ElTy = cast<llvm::ArrayType>(Addr.getElementType());
@@ -239,16 +213,11 @@
   /// produce
   ///   %name = getelementptr inbounds %addr, i64 index
   /// where i64 is actually the target word size.
-  ///
-  /// \param EltSize - the size of the type T in bytes
   Address CreateConstInBoundsGEP(Address Addr, uint64_t Index,
-                                 CharUnits EltSize,
                                  const llvm::Twine &Name = "") {
-#ifndef NDEBUG
     llvm::Type *ElTy = Addr.getElementType();
     const llvm::DataLayout &DL = BB->getParent()->getParent()->getDataLayout();
-    assert(DL.getTypeAllocSize(ElTy) == (uint64_t)EltSize.getQuantity());
-#endif
+    CharUnits EltSize = CharUnits::fromQuantity(DL.getTypeAllocSize(ElTy));
 
     return Address(CreateInBoundsGEP(Addr.getElementType(), Addr.getPointer(),
                                      getSize(Index), Name),
@@ -260,15 +229,12 @@
   /// produce
   ///   %name = getelementptr inbounds %addr, i64 index
   /// where i64 is actually the target word size.
-  ///
-  /// \param EltSize - the size of the type T in bytes
-  Address CreateConstGEP(Address Addr, uint64_t Index, CharUnits EltSize,
+  Address CreateConstGEP(Address Addr, uint64_t Index,
                          const llvm::Twine &Name = "") {
-#ifndef NDEBUG
     const llvm::DataLayout &DL = BB->getParent()->getParent()->getDataLayout();
-    assert(DL.getTypeAllocSize(Addr.getElementType()) ==
-           (uint64_t)EltSize.getQuantity());
-#endif
+    CharUnits EltSize =
+        CharUnits::fromQuantity(DL.getTypeAllocSize(Addr.getElementType()));
+
     return Address(CreateGEP(Addr.getElementType(), Addr.getPointer(),
                              getSize(Index), Name),
                    Addr.getAlignment().alignmentAtOffset(Index * EltSize));
@@ -289,13 +255,9 @@
   }
 
   using CGBuilderBaseTy::CreateConstInBoundsGEP2_32;
-  Address CreateConstInBoundsGEP2_32(Address Addr, unsigned Idx0,
-                                      unsigned Idx1, const llvm::DataLayout &DL,
-                                      const llvm::Twine &Name = "") {
-#ifndef NDEBUG
-    const llvm::DataLayout &DL2 = BB->getParent()->getParent()->getDataLayout();
-    assert(DL == DL2);
-#endif
+  Address CreateConstInBoundsGEP2_32(Address Addr, unsigned Idx0, unsigned Idx1,
+                                     const llvm::Twine &Name = "") {
+    const llvm::DataLayout &DL = BB->getParent()->getParent()->getDataLayout();
 
     auto *GEP = cast<llvm::GetElementPtrInst>(CreateConstInBoundsGEP2_32(
         Addr.getElementType(), Addr.getPointer(), Idx0, Idx1, Name));
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -2513,8 +2513,7 @@
     // Store the stack pointer to the setjmp buffer.
     Value *StackAddr =
         Builder.CreateCall(CGM.getIntrinsic(Intrinsic::stacksave));
-    Address StackSaveSlot =
-      Builder.CreateConstInBoundsGEP(Buf, 2, getPointerSize());
+    Address StackSaveSlot = Builder.CreateConstInBoundsGEP(Buf, 2);
     Builder.CreateStore(StackAddr, StackSaveSlot);
 
     // Call LLVM's EH setjmp, which is lightweight.
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -1151,7 +1151,7 @@
     return SrcPtr;
 
   // GEP into the first element.
-  SrcPtr = CGF.Builder.CreateStructGEP(SrcPtr, 0, CharUnits(), "coerce.dive");
+  SrcPtr = CGF.Builder.CreateStructGEP(SrcPtr, 0, "coerce.dive");
 
   // If the first element is a struct, recurse.
   llvm::Type *SrcTy = SrcPtr.getElementType();
@@ -1279,12 +1279,8 @@
   // Prefer scalar stores to first-class aggregate stores.
   if (llvm::StructType *STy =
         dyn_cast<llvm::StructType>(Val->getType())) {
-    const llvm::StructLayout *Layout =
-      CGF.CGM.getDataLayout().getStructLayout(STy);
-
     for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
-      auto EltOffset = CharUnits::fromQuantity(Layout->getElementOffset(i));
-      Address EltPtr = CGF.Builder.CreateStructGEP(Dest, i, EltOffset);
+      Address EltPtr = CGF.Builder.CreateStructGEP(Dest, i);
       llvm::Value *Elt = CGF.Builder.CreateExtractValue(Val, i);
       CGF.Builder.CreateStore(Elt, EltPtr, DestIsVolatile);
     }
@@ -2271,9 +2267,7 @@
   // If we're using inalloca, all the memory arguments are GEPs off of the last
   // parameter, which is a pointer to the complete memory area.
   Address ArgStruct = Address::invalid();
-  const llvm::StructLayout *ArgStructLayout = nullptr;
   if (IRFunctionArgs.hasInallocaArg()) {
-    ArgStructLayout = CGM.getDataLayout().getStructLayout(FI.getArgStruct());
     ArgStruct = Address(FnArgs[IRFunctionArgs.getInallocaArgNo()],
                         FI.getArgStructAlignment());
 
@@ -2322,10 +2316,8 @@
     case ABIArgInfo::InAlloca: {
       assert(NumIRArgs == 0);
       auto FieldIndex = ArgI.getInAllocaFieldIndex();
-      CharUnits FieldOffset =
-        CharUnits::fromQuantity(ArgStructLayout->getElementOffset(FieldIndex));
-      Address V = Builder.CreateStructGEP(ArgStruct, FieldIndex, FieldOffset,
-                                          Arg->getName());
+      Address V =
+          Builder.CreateStructGEP(ArgStruct, FieldIndex, Arg->getName());
       ArgVals.push_back(ParamValue::forIndirect(V));
       break;
     }
@@ -2485,7 +2477,6 @@
       llvm::StructType *STy = dyn_cast<llvm::StructType>(ArgI.getCoerceToType());
       if (ArgI.isDirect() && ArgI.getCanBeFlattened() && STy &&
           STy->getNumElements() > 1) {
-        auto SrcLayout = CGM.getDataLayout().getStructLayout(STy);
         uint64_t SrcSize = CGM.getDataLayout().getTypeAllocSize(STy);
         llvm::Type *DstTy = Ptr.getElementType();
         uint64_t DstSize = CGM.getDataLayout().getTypeAllocSize(DstTy);
@@ -2502,9 +2493,7 @@
         for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
           auto AI = FnArgs[FirstIRArg + i];
           AI->setName(Arg->getName() + ".coerce" + Twine(i));
-          auto Offset = CharUnits::fromQuantity(SrcLayout->getElementOffset(i));
-          Address EltPtr =
-            Builder.CreateStructGEP(AddrToStoreInto, i, Offset);
+          Address EltPtr = Builder.CreateStructGEP(AddrToStoreInto, i);
           Builder.CreateStore(AI, EltPtr);
         }
 
@@ -2540,7 +2529,6 @@
 
       auto coercionType = ArgI.getCoerceAndExpandType();
       alloca = Builder.CreateElementBitCast(alloca, coercionType);
-      auto layout = CGM.getDataLayout().getStructLayout(coercionType);
 
       unsigned argIndex = FirstIRArg;
       for (unsigned i = 0, e = coercionType->getNumElements(); i != e; ++i) {
@@ -2548,7 +2536,7 @@
         if (ABIArgInfo::isPaddingForCoerceAndExpand(eltType))
           continue;
 
-        auto eltAddr = Builder.CreateStructGEP(alloca, i, layout);
+        auto eltAddr = Builder.CreateStructGEP(alloca, i);
         auto elt = FnArgs[argIndex++];
         Builder.CreateStore(elt, eltAddr);
       }
@@ -2953,7 +2941,6 @@
 
   case ABIArgInfo::CoerceAndExpand: {
     auto coercionType = RetAI.getCoerceAndExpandType();
-    auto layout = CGM.getDataLayout().getStructLayout(coercionType);
 
     // Load all of the coerced elements out into results.
     llvm::SmallVector<llvm::Value*, 4> results;
@@ -2963,7 +2950,7 @@
       if (ABIArgInfo::isPaddingForCoerceAndExpand(coercedEltType))
         continue;
 
-      auto eltAddr = Builder.CreateStructGEP(addr, i, layout);
+      auto eltAddr = Builder.CreateStructGEP(addr, i);
       auto elt = Builder.CreateLoad(eltAddr);
       results.push_back(elt);
     }
@@ -3847,10 +3834,8 @@
   // If we're using inalloca, insert the allocation after the stack save.
   // FIXME: Do this earlier rather than hacking it in here!
   Address ArgMemory = Address::invalid();
-  const llvm::StructLayout *ArgMemoryLayout = nullptr;
   if (llvm::StructType *ArgStruct = CallInfo.getArgStruct()) {
     const llvm::DataLayout &DL = CGM.getDataLayout();
-    ArgMemoryLayout = DL.getStructLayout(ArgStruct);
     llvm::Instruction *IP = CallArgs.getStackBase();
     llvm::AllocaInst *AI;
     if (IP) {
@@ -3867,13 +3852,6 @@
     ArgMemory = Address(AI, Align);
   }
 
-  // Helper function to drill into the inalloca allocation.
-  auto createInAllocaStructGEP = [&](unsigned FieldIndex) -> Address {
-    auto FieldOffset =
-      CharUnits::fromQuantity(ArgMemoryLayout->getElementOffset(FieldIndex));
-    return Builder.CreateStructGEP(ArgMemory, FieldIndex, FieldOffset);
-  };
-
   ClangToLLVMArgMapping IRFunctionArgs(CGM.getContext(), CallInfo);
   SmallVector<llvm::Value *, 16> IRCallArgs(IRFunctionArgs.totalIRArgs());
 
@@ -3896,7 +3874,8 @@
     if (IRFunctionArgs.hasSRetArg()) {
       IRCallArgs[IRFunctionArgs.getSRetArgNo()] = SRetPtr.getPointer();
     } else if (RetAI.isInAlloca()) {
-      Address Addr = createInAllocaStructGEP(RetAI.getInAllocaFieldIndex());
+      Address Addr =
+          Builder.CreateStructGEP(ArgMemory, RetAI.getInAllocaFieldIndex());
       Builder.CreateStore(SRetPtr.getPointer(), Addr);
     }
   }
@@ -3934,12 +3913,14 @@
             cast<llvm::Instruction>(Addr.getPointer());
         CGBuilderTy::InsertPoint IP = Builder.saveIP();
         Builder.SetInsertPoint(Placeholder);
-        Addr = createInAllocaStructGEP(ArgInfo.getInAllocaFieldIndex());
+        Addr =
+            Builder.CreateStructGEP(ArgMemory, ArgInfo.getInAllocaFieldIndex());
         Builder.restoreIP(IP);
         deferPlaceholderReplacement(Placeholder, Addr.getPointer());
       } else {
         // Store the RValue into the argument struct.
-        Address Addr = createInAllocaStructGEP(ArgInfo.getInAllocaFieldIndex());
+        Address Addr =
+            Builder.CreateStructGEP(ArgMemory, ArgInfo.getInAllocaFieldIndex());
         unsigned AS = Addr.getType()->getPointerAddressSpace();
         llvm::Type *MemType = ConvertTypeForMem(I->Ty)->getPointerTo(AS);
         // There are some cases where a trivial bitcast is not avoidable.  The
@@ -4120,11 +4101,9 @@
                                       STy->getPointerTo(Src.getAddressSpace()));
         }
 
-        auto SrcLayout = CGM.getDataLayout().getStructLayout(STy);
         assert(NumIRArgs == STy->getNumElements());
         for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
-          auto Offset = CharUnits::fromQuantity(SrcLayout->getElementOffset(i));
-          Address EltPtr = Builder.CreateStructGEP(Src, i, Offset);
+          Address EltPtr = Builder.CreateStructGEP(Src, i);
           llvm::Value *LI = Builder.CreateLoad(EltPtr);
           IRCallArgs[FirstIRArg + i] = LI;
         }
@@ -4174,7 +4153,7 @@
       for (unsigned i = 0, e = coercionType->getNumElements(); i != e; ++i) {
         llvm::Type *eltType = coercionType->getElementType(i);
         if (ABIArgInfo::isPaddingForCoerceAndExpand(eltType)) continue;
-        Address eltAddr = Builder.CreateStructGEP(addr, i, layout);
+        Address eltAddr = Builder.CreateStructGEP(addr, i);
         llvm::Value *elt = Builder.CreateLoad(eltAddr);
         IRCallArgs[IRArgPos++] = elt;
       }
@@ -4471,7 +4450,6 @@
     switch (RetAI.getKind()) {
     case ABIArgInfo::CoerceAndExpand: {
       auto coercionType = RetAI.getCoerceAndExpandType();
-      auto layout = CGM.getDataLayout().getStructLayout(coercionType);
 
       Address addr = SRetPtr;
       addr = Builder.CreateElementBitCast(addr, coercionType);
@@ -4483,7 +4461,7 @@
       for (unsigned i = 0, e = coercionType->getNumElements(); i != e; ++i) {
         llvm::Type *eltType = coercionType->getElementType(i);
         if (ABIArgInfo::isPaddingForCoerceAndExpand(eltType)) continue;
-        Address eltAddr = Builder.CreateStructGEP(addr, i, layout);
+        Address eltAddr = Builder.CreateStructGEP(addr, i);
         llvm::Value *elt = CI;
         if (requiresExtract)
           elt = Builder.CreateExtractValue(elt, unpaddedIndex++);
diff --git a/clang/lib/CodeGen/CGCleanup.cpp b/clang/lib/CodeGen/CGCleanup.cpp
--- a/clang/lib/CodeGen/CGCleanup.cpp
+++ b/clang/lib/CodeGen/CGCleanup.cpp
@@ -52,12 +52,8 @@
     llvm::Type *ComplexTy =
         llvm::StructType::get(V.first->getType(), V.second->getType());
     Address addr = CGF.CreateDefaultAlignTempAlloca(ComplexTy, "saved-complex");
-    CGF.Builder.CreateStore(V.first,
-                            CGF.Builder.CreateStructGEP(addr, 0, CharUnits()));
-    CharUnits offset = CharUnits::fromQuantity(
-               CGF.CGM.getDataLayout().getTypeAllocSize(V.first->getType()));
-    CGF.Builder.CreateStore(V.second,
-                            CGF.Builder.CreateStructGEP(addr, 1, offset));
+    CGF.Builder.CreateStore(V.first, CGF.Builder.CreateStructGEP(addr, 0));
+    CGF.Builder.CreateStore(V.second, CGF.Builder.CreateStructGEP(addr, 1));
     return saved_type(addr.getPointer(), ComplexAddress);
   }
 
@@ -95,12 +91,10 @@
   }
   case ComplexAddress: {
     Address address = getSavingAddress(Value);
-    llvm::Value *real = CGF.Builder.CreateLoad(
-                 CGF.Builder.CreateStructGEP(address, 0, CharUnits()));
-    CharUnits offset = CharUnits::fromQuantity(
-                 CGF.CGM.getDataLayout().getTypeAllocSize(real->getType()));
-    llvm::Value *imag = CGF.Builder.CreateLoad(
-                 CGF.Builder.CreateStructGEP(address, 1, offset));
+    llvm::Value *real =
+        CGF.Builder.CreateLoad(CGF.Builder.CreateStructGEP(address, 0));
+    llvm::Value *imag =
+        CGF.Builder.CreateLoad(CGF.Builder.CreateStructGEP(address, 1));
     return RValue::getComplex(real, imag);
   }
   }
diff --git a/clang/lib/CodeGen/CGDecl.cpp b/clang/lib/CodeGen/CGDecl.cpp
--- a/clang/lib/CodeGen/CGDecl.cpp
+++ b/clang/lib/CodeGen/CGDecl.cpp
@@ -917,9 +917,8 @@
       // If necessary, get a pointer to the element and emit it.
       if (!Elt->isNullValue() && !isa<llvm::UndefValue>(Elt))
         emitStoresForInitAfterBZero(
-            CGM, Elt,
-            Builder.CreateConstInBoundsGEP2_32(Loc, 0, i, CGM.getDataLayout()),
-            isVolatile, Builder);
+            CGM, Elt, Builder.CreateConstInBoundsGEP2_32(Loc, 0, i), isVolatile,
+            Builder);
     }
     return;
   }
@@ -932,10 +931,9 @@
 
     // If necessary, get a pointer to the element and emit it.
     if (!Elt->isNullValue() && !isa<llvm::UndefValue>(Elt))
-      emitStoresForInitAfterBZero(
-          CGM, Elt,
-          Builder.CreateConstInBoundsGEP2_32(Loc, 0, i, CGM.getDataLayout()),
-          isVolatile, Builder);
+      emitStoresForInitAfterBZero(CGM, Elt,
+                                  Builder.CreateConstInBoundsGEP2_32(Loc, 0, i),
+                                  isVolatile, Builder);
   }
 }
 
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1884,7 +1884,6 @@
 
   Address VectorBasePtrPlusIx =
     Builder.CreateConstInBoundsGEP(CastToPointerElement, ix,
-                                   getContext().getTypeSizeInChars(EQT),
                                    "vector.elt");
 
   return VectorBasePtrPlusIx;
@@ -3824,20 +3823,7 @@
   unsigned idx =
     CGF.CGM.getTypes().getCGRecordLayout(rec).getLLVMFieldNo(field);
 
-  CharUnits offset;
-  // Adjust the alignment down to the given offset.
-  // As a special case, if the LLVM field index is 0, we know that this
-  // is zero.
-  assert((idx != 0 || CGF.getContext().getASTRecordLayout(rec)
-                         .getFieldOffset(field->getFieldIndex()) == 0) &&
-         "LLVM field at index zero had non-zero offset?");
-  if (idx != 0) {
-    auto &recLayout = CGF.getContext().getASTRecordLayout(rec);
-    auto offsetInBits = recLayout.getFieldOffset(field->getFieldIndex());
-    offset = CGF.getContext().toCharUnitsFromBits(offsetInBits);
-  }
-
-  return CGF.Builder.CreateStructGEP(base, idx, offset, field->getName());
+  return CGF.Builder.CreateStructGEP(base, idx, field->getName());
 }
 
 static bool hasAnyVptr(const QualType Type, const ASTContext &Context) {
@@ -3871,8 +3857,7 @@
     unsigned Idx = RL.getLLVMFieldNo(field);
     if (Idx != 0)
       // For structs, we GEP to the field that the record layout suggests.
-      Addr = Builder.CreateStructGEP(Addr, Idx, Info.StorageOffset,
-                                     field->getName());
+      Addr = Builder.CreateStructGEP(Addr, Idx, field->getName());
     // Get the access type.
     llvm::Type *FieldIntTy =
       llvm::Type::getIntNTy(getLLVMContext(), Info.StorageSize);
diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp
--- a/clang/lib/CodeGen/CGExprAgg.cpp
+++ b/clang/lib/CodeGen/CGExprAgg.cpp
@@ -759,8 +759,7 @@
 
         // Build a GEP to refer to the subobject.
         Address valueAddr =
-            CGF.Builder.CreateStructGEP(valueDest.getAddress(), 0,
-                                        CharUnits());
+            CGF.Builder.CreateStructGEP(valueDest.getAddress(), 0);
         valueDest = AggValueSlot::forAddr(valueAddr,
                                           valueDest.getQualifiers(),
                                           valueDest.isExternallyDestructed(),
@@ -780,8 +779,7 @@
       CGF.CreateAggTemp(atomicType, "atomic-to-nonatomic.temp");
     CGF.EmitAggExpr(E->getSubExpr(), atomicSlot);
 
-    Address valueAddr =
-      Builder.CreateStructGEP(atomicSlot.getAddress(), 0, CharUnits());
+    Address valueAddr = Builder.CreateStructGEP(atomicSlot.getAddress(), 0);
     RValue rvalue = RValue::getAggregate(valueAddr, atomicSlot.isVolatile());
     return EmitFinalDestCopy(valueType, rvalue);
   }
diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp
--- a/clang/lib/CodeGen/CGExprComplex.cpp
+++ b/clang/lib/CodeGen/CGExprComplex.cpp
@@ -327,15 +327,12 @@
 
 Address CodeGenFunction::emitAddrOfRealComponent(Address addr,
                                                  QualType complexType) {
-  CharUnits offset = CharUnits::Zero();
-  return Builder.CreateStructGEP(addr, 0, offset, addr.getName() + ".realp");
+  return Builder.CreateStructGEP(addr, 0, addr.getName() + ".realp");
 }
 
 Address CodeGenFunction::emitAddrOfImagComponent(Address addr,
                                                  QualType complexType) {
-  QualType eltType = complexType->castAs<ComplexType>()->getElementType();
-  CharUnits offset = getContext().getTypeSizeInChars(eltType);
-  return Builder.CreateStructGEP(addr, 1, offset, addr.getName() + ".imagp");
+  return Builder.CreateStructGEP(addr, 1, addr.getName() + ".imagp");
 }
 
 /// EmitLoadOfLValue - Given an RValue reference for a complex, emit code to
diff --git a/clang/lib/CodeGen/CGNonTrivialStruct.cpp b/clang/lib/CodeGen/CGNonTrivialStruct.cpp
--- a/clang/lib/CodeGen/CGNonTrivialStruct.cpp
+++ b/clang/lib/CodeGen/CGNonTrivialStruct.cpp
@@ -413,8 +413,7 @@
     if (Offset.getQuantity() == 0)
       return Addr;
     Addr = CGF->Builder.CreateBitCast(Addr, CGF->CGM.Int8PtrTy);
-    Addr = CGF->Builder.CreateConstInBoundsGEP(Addr, Offset.getQuantity(),
-                                               CharUnits::One());
+    Addr = CGF->Builder.CreateConstInBoundsGEP(Addr, Offset.getQuantity());
     return CGF->Builder.CreateBitCast(Addr, CGF->CGM.Int8PtrPtrTy);
   }
 
diff --git a/clang/lib/CodeGen/CGObjC.cpp b/clang/lib/CodeGen/CGObjC.cpp
--- a/clang/lib/CodeGen/CGObjC.cpp
+++ b/clang/lib/CodeGen/CGObjC.cpp
@@ -158,9 +158,8 @@
     if (ALE) {
       // Emit the element and store it to the appropriate array slot.
       const Expr *Rhs = ALE->getElement(i);
-      LValue LV = MakeAddrLValue(
-          Builder.CreateConstArrayGEP(Objects, i, getPointerSize()),
-          ElementType, AlignmentSource::Decl);
+      LValue LV = MakeAddrLValue(Builder.CreateConstArrayGEP(Objects, i),
+                                 ElementType, AlignmentSource::Decl);
 
       llvm::Value *value = EmitScalarExpr(Rhs);
       EmitStoreThroughLValue(RValue::get(value), LV, true);
@@ -170,17 +169,15 @@
     } else {
       // Emit the key and store it to the appropriate array slot.
       const Expr *Key = DLE->getKeyValueElement(i).Key;
-      LValue KeyLV = MakeAddrLValue(
-          Builder.CreateConstArrayGEP(Keys, i, getPointerSize()),
-          ElementType, AlignmentSource::Decl);
+      LValue KeyLV = MakeAddrLValue(Builder.CreateConstArrayGEP(Keys, i),
+                                    ElementType, AlignmentSource::Decl);
       llvm::Value *keyValue = EmitScalarExpr(Key);
       EmitStoreThroughLValue(RValue::get(keyValue), KeyLV, /*isInit=*/true);
 
       // Emit the value and store it to the appropriate array slot.
       const Expr *Value = DLE->getKeyValueElement(i).Value;
-      LValue ValueLV = MakeAddrLValue(
-          Builder.CreateConstArrayGEP(Objects, i, getPointerSize()),
-          ElementType, AlignmentSource::Decl);
+      LValue ValueLV = MakeAddrLValue(Builder.CreateConstArrayGEP(Objects, i),
+                                      ElementType, AlignmentSource::Decl);
       llvm::Value *valueValue = EmitScalarExpr(Value);
       EmitStoreThroughLValue(RValue::get(valueValue), ValueLV, /*isInit=*/true);
       if (TrackNeededObjects) {
@@ -1666,8 +1663,8 @@
   // Save the initial mutations value.  This is the value at an
   // address that was written into the state object by
   // countByEnumeratingWithState:objects:count:.
-  Address StateMutationsPtrPtr = Builder.CreateStructGEP(
-      StatePtr, 2, 2 * getPointerSize(), "mutationsptr.ptr");
+  Address StateMutationsPtrPtr =
+      Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr");
   llvm::Value *StateMutationsPtr
     = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr");
 
@@ -1748,8 +1745,8 @@
   // Fetch the buffer out of the enumeration state.
   // TODO: this pointer should actually be invariant between
   // refreshes, which would help us do certain loop optimizations.
-  Address StateItemsPtr = Builder.CreateStructGEP(
-      StatePtr, 1, getPointerSize(), "stateitems.ptr");
+  Address StateItemsPtr =
+      Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr");
   llvm::Value *EnumStateItems =
     Builder.CreateLoad(StateItemsPtr, "stateitems");
 
diff --git a/clang/lib/CodeGen/CGObjCGNU.cpp b/clang/lib/CodeGen/CGObjCGNU.cpp
--- a/clang/lib/CodeGen/CGObjCGNU.cpp
+++ b/clang/lib/CodeGen/CGObjCGNU.cpp
@@ -2473,10 +2473,8 @@
   Address ObjCSuper = CGF.CreateTempAlloca(ObjCSuperTy,
                               CGF.getPointerAlign());
 
-  Builder.CreateStore(Receiver,
-                   Builder.CreateStructGEP(ObjCSuper, 0, CharUnits::Zero()));
-  Builder.CreateStore(ReceiverClass,
-                   Builder.CreateStructGEP(ObjCSuper, 1, CGF.getPointerSize()));
+  Builder.CreateStore(Receiver, Builder.CreateStructGEP(ObjCSuper, 0));
+  Builder.CreateStore(ReceiverClass, Builder.CreateStructGEP(ObjCSuper, 1));
 
   ObjCSuper = EnforceType(Builder, ObjCSuper, PtrToObjCSuperTy);
 
diff --git a/clang/lib/CodeGen/CGObjCMac.cpp b/clang/lib/CodeGen/CGObjCMac.cpp
--- a/clang/lib/CodeGen/CGObjCMac.cpp
+++ b/clang/lib/CodeGen/CGObjCMac.cpp
@@ -2008,9 +2008,8 @@
                          "objc_super");
   llvm::Value *ReceiverAsObject =
     CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
-  CGF.Builder.CreateStore(
-      ReceiverAsObject,
-      CGF.Builder.CreateStructGEP(ObjCSuper, 0, CharUnits::Zero()));
+  CGF.Builder.CreateStore(ReceiverAsObject,
+                          CGF.Builder.CreateStructGEP(ObjCSuper, 0));
 
   // If this is a class message the metaclass is passed as the target.
   llvm::Value *Target;
@@ -2045,8 +2044,7 @@
   llvm::Type *ClassTy =
     CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
   Target = CGF.Builder.CreateBitCast(Target, ClassTy);
-  CGF.Builder.CreateStore(Target,
-          CGF.Builder.CreateStructGEP(ObjCSuper, 1, CGF.getPointerSize()));
+  CGF.Builder.CreateStore(Target, CGF.Builder.CreateStructGEP(ObjCSuper, 1));
   return EmitMessageSend(CGF, Return, ResultType,
                          EmitSelector(CGF, Sel),
                          ObjCSuper.getPointer(), ObjCTypes.SuperPtrCTy,
@@ -7156,8 +7154,7 @@
   args[1].setRValue(RValue::get(mref.getPointer()));
 
   // Load the function to call from the message ref table.
-  Address calleeAddr =
-      CGF.Builder.CreateStructGEP(mref, 0, CharUnits::Zero());
+  Address calleeAddr = CGF.Builder.CreateStructGEP(mref, 0);
   llvm::Value *calleePtr = CGF.Builder.CreateLoad(calleeAddr, "msgSend_fn");
 
   calleePtr = CGF.Builder.CreateBitCast(calleePtr, MSI.MessengerType);
@@ -7354,9 +7351,8 @@
 
   llvm::Value *ReceiverAsObject =
     CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
-  CGF.Builder.CreateStore(
-      ReceiverAsObject,
-      CGF.Builder.CreateStructGEP(ObjCSuper, 0, CharUnits::Zero()));
+  CGF.Builder.CreateStore(ReceiverAsObject,
+                          CGF.Builder.CreateStructGEP(ObjCSuper, 0));
 
   // If this is a class message the metaclass is passed as the target.
   llvm::Value *Target;
@@ -7370,8 +7366,7 @@
   llvm::Type *ClassTy =
     CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
   Target = CGF.Builder.CreateBitCast(Target, ClassTy);
-  CGF.Builder.CreateStore(
-      Target, CGF.Builder.CreateStructGEP(ObjCSuper, 1, CGF.getPointerSize()));
+  CGF.Builder.CreateStore(Target, CGF.Builder.CreateStructGEP(ObjCSuper, 1));
 
   return (isVTableDispatchedSelector(Sel))
     ? EmitVTableMessageSend(CGF, Return, ResultType, Sel,
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -3090,8 +3090,7 @@
 static Address emitAddrOfVarFromArray(CodeGenFunction &CGF, Address Array,
                                       unsigned Index, const VarDecl *Var) {
   // Pull out the pointer to the variable.
-  Address PtrAddr =
-      CGF.Builder.CreateConstArrayGEP(Array, Index, CGF.getPointerSize());
+  Address PtrAddr = CGF.Builder.CreateConstArrayGEP(Array, Index);
   llvm::Value *Ptr = CGF.Builder.CreateLoad(PtrAddr);
 
   Address Addr = Address(Ptr, CGF.getContext().getDeclAlign(Var));
@@ -3207,8 +3206,7 @@
     Address CopyprivateList =
         CGF.CreateMemTemp(CopyprivateArrayTy, ".omp.copyprivate.cpr_list");
     for (unsigned I = 0, E = CopyprivateVars.size(); I < E; ++I) {
-      Address Elem = CGF.Builder.CreateConstArrayGEP(
-          CopyprivateList, I, CGF.getPointerSize());
+      Address Elem = CGF.Builder.CreateConstArrayGEP(CopyprivateList, I);
       CGF.Builder.CreateStore(
           CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
               CGF.EmitLValue(CopyprivateVars[I]).getPointer(), CGF.VoidPtrTy),
@@ -5105,7 +5103,6 @@
     } else {
       KmpDependInfoRD = cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());
     }
-    CharUnits DependencySize = C.getTypeSizeInChars(KmpDependInfoTy);
     // Define type kmp_depend_info[<Dependences.size()>];
     QualType KmpDependInfoArrayTy = C.getConstantArrayType(
         KmpDependInfoTy, llvm::APInt(/*numBits=*/64, NumDependencies),
@@ -5132,7 +5129,7 @@
         Size = CGF.getTypeSize(Ty);
       }
       LValue Base = CGF.MakeAddrLValue(
-          CGF.Builder.CreateConstArrayGEP(DependenciesArray, I, DependencySize),
+          CGF.Builder.CreateConstArrayGEP(DependenciesArray, I),
           KmpDependInfoTy);
       // deps[i].base_addr = &<Dependences[i].second>;
       LValue BaseAddrLVal = CGF.EmitLValueForField(
@@ -5499,8 +5496,7 @@
     if (PrivTy->isVariablyModifiedType()) {
       // Get array size and emit VLA type.
       ++Idx;
-      Address Elem =
-          CGF.Builder.CreateConstArrayGEP(LHS, Idx, CGF.getPointerSize());
+      Address Elem = CGF.Builder.CreateConstArrayGEP(LHS, Idx);
       llvm::Value *Ptr = CGF.Builder.CreateLoad(Elem);
       const VariableArrayType *VLA =
           CGF.getContext().getAsVariableArrayType(PrivTy);
@@ -5638,8 +5634,7 @@
   auto IPriv = Privates.begin();
   unsigned Idx = 0;
   for (unsigned I = 0, E = RHSExprs.size(); I < E; ++I, ++IPriv, ++Idx) {
-    Address Elem =
-      CGF.Builder.CreateConstArrayGEP(ReductionList, Idx, CGF.getPointerSize());
+    Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx);
     CGF.Builder.CreateStore(
         CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
             CGF.EmitLValue(RHSExprs[I]).getPointer(), CGF.VoidPtrTy),
@@ -5647,8 +5642,7 @@
     if ((*IPriv)->getType()->isVariablyModifiedType()) {
       // Store array size.
       ++Idx;
-      Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx,
-                                             CGF.getPointerSize());
+      Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx);
       llvm::Value *Size = CGF.Builder.CreateIntCast(
           CGF.getVLASize(
                  CGF.getContext().getAsVariableArrayType((*IPriv)->getType()))
@@ -7168,7 +7162,7 @@
           Address HB = CGF.Builder.CreateConstGEP(
               CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(LB,
                                                               CGF.VoidPtrTy),
-              TypeSize.getQuantity() - 1, CharUnits::One());
+              TypeSize.getQuantity() - 1);
           PartialStruct.HighestElem = {
               std::numeric_limits<decltype(
                   PartialStruct.HighestElem.first)>::max(),
@@ -7202,15 +7196,13 @@
             Pointers.push_back(LB.getPointer());
             Sizes.push_back(Size);
             Types.push_back(Flags);
-            LB = CGF.Builder.CreateConstGEP(ComponentLB, 1,
-                                            CGF.getPointerSize());
+            LB = CGF.Builder.CreateConstGEP(ComponentLB, 1);
           }
           BasePointers.push_back(BP.getPointer());
           Pointers.push_back(LB.getPointer());
           Size = CGF.Builder.CreatePtrDiff(
               CGF.EmitCastToVoidPtr(
-                  CGF.Builder.CreateConstGEP(HB, 1, CharUnits::One())
-                      .getPointer()),
+                  CGF.Builder.CreateConstGEP(HB, 1).getPointer()),
               CGF.EmitCastToVoidPtr(LB.getPointer()));
           Sizes.push_back(Size);
           Types.push_back(Flags);
@@ -9491,10 +9483,8 @@
   enum { LowerFD = 0, UpperFD, StrideFD };
   // Fill dims with data.
   for (unsigned I = 0, E = NumIterations.size(); I < E; ++I) {
-    LValue DimsLVal =
-        CGF.MakeAddrLValue(CGF.Builder.CreateConstArrayGEP(
-                               DimsAddr, I, C.getTypeSizeInChars(KmpDimTy)),
-                           KmpDimTy);
+    LValue DimsLVal = CGF.MakeAddrLValue(
+        CGF.Builder.CreateConstArrayGEP(DimsAddr, I), KmpDimTy);
     // dims.upper = num_iterations;
     LValue UpperLVal = CGF.EmitLValueForField(
         DimsLVal, *std::next(RD->field_begin(), UpperFD));
@@ -9517,9 +9507,7 @@
       getThreadID(CGF, D.getBeginLoc()),
       llvm::ConstantInt::getSigned(CGM.Int32Ty, NumIterations.size()),
       CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
-          CGF.Builder
-              .CreateConstArrayGEP(DimsAddr, 0, C.getTypeSizeInChars(KmpDimTy))
-              .getPointer(),
+          CGF.Builder.CreateConstArrayGEP(DimsAddr, 0).getPointer(),
           CGM.VoidPtrTy)};
 
   llvm::FunctionCallee RTLFn =
@@ -9547,19 +9535,13 @@
     llvm::Value *CntVal = CGF.EmitScalarConversion(
         CGF.EmitScalarExpr(CounterVal), CounterVal->getType(), Int64Ty,
         CounterVal->getExprLoc());
-    CGF.EmitStoreOfScalar(
-        CntVal,
-        CGF.Builder.CreateConstArrayGEP(
-            CntAddr, I, CGM.getContext().getTypeSizeInChars(Int64Ty)),
-        /*Volatile=*/false, Int64Ty);
+    CGF.EmitStoreOfScalar(CntVal, CGF.Builder.CreateConstArrayGEP(CntAddr, I),
+                          /*Volatile=*/false, Int64Ty);
   }
   llvm::Value *Args[] = {
       emitUpdateLocation(CGF, C->getBeginLoc()),
       getThreadID(CGF, C->getBeginLoc()),
-      CGF.Builder
-          .CreateConstArrayGEP(CntAddr, 0,
-                               CGM.getContext().getTypeSizeInChars(Int64Ty))
-          .getPointer()};
+      CGF.Builder.CreateConstArrayGEP(CntAddr, 0).getPointer()};
   llvm::FunctionCallee RTLFn;
   if (C->getDependencyKind() == OMPC_DEPEND_source) {
     RTLFn = createRuntimeFunction(OMPRTL__kmpc_doacross_post);
diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
@@ -2240,8 +2240,7 @@
               .getPointerType(CGM.getContext().VoidPtrTy)
               .castAs<PointerType>());
       llvm::Value *GlobalRecValue =
-          Bld.CreateConstInBoundsGEP(FrameAddr, Offset, CharUnits::One())
-              .getPointer();
+          Bld.CreateConstInBoundsGEP(FrameAddr, Offset).getPointer();
       I->getSecond().GlobalRecordAddr = GlobalRecValue;
       I->getSecond().IsInSPMDModeFlag = nullptr;
       GlobalRecCastAddr = Bld.CreatePointerBitCastOrAddrSpaceCast(
@@ -2541,8 +2540,7 @@
           SharedArgs, Ctx.getPointerType(Ctx.getPointerType(Ctx.VoidPtrTy))
                           .castAs<PointerType>());
       for (llvm::Value *V : CapturedVars) {
-        Address Dst = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx,
-                                                 CGF.getPointerSize());
+        Address Dst = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx);
         llvm::Value *PtrV;
         if (V->getType()->isIntegerTy())
           PtrV = Bld.CreateIntToPtr(V, CGF.VoidPtrTy);
@@ -2851,7 +2849,7 @@
   Address ElemPtr = DestAddr;
   Address Ptr = SrcAddr;
   Address PtrEnd = Bld.CreatePointerBitCastOrAddrSpaceCast(
-      Bld.CreateConstGEP(SrcAddr, 1, Size), CGF.VoidPtrTy);
+      Bld.CreateConstGEP(SrcAddr, 1), CGF.VoidPtrTy);
   for (int IntSize = 8; IntSize >= 1; IntSize /= 2) {
     if (Size < CharUnits::fromQuantity(IntSize))
       continue;
@@ -2886,10 +2884,8 @@
           CGF, CGF.EmitLoadOfScalar(Ptr, /*Volatile=*/false, IntType, Loc),
           IntType, Offset, Loc);
       CGF.EmitStoreOfScalar(Res, ElemPtr, /*Volatile=*/false, IntType);
-      Address LocalPtr =
-          Bld.CreateConstGEP(Ptr, 1, CharUnits::fromQuantity(IntSize));
-      Address LocalElemPtr =
-          Bld.CreateConstGEP(ElemPtr, 1, CharUnits::fromQuantity(IntSize));
+      Address LocalPtr = Bld.CreateConstGEP(Ptr, 1);
+      Address LocalElemPtr = Bld.CreateConstGEP(ElemPtr, 1);
       PhiSrc->addIncoming(LocalPtr.getPointer(), ThenBB);
       PhiDest->addIncoming(LocalElemPtr.getPointer(), ThenBB);
       CGF.EmitBranch(PreCondBB);
@@ -2899,9 +2895,8 @@
           CGF, CGF.EmitLoadOfScalar(Ptr, /*Volatile=*/false, IntType, Loc),
           IntType, Offset, Loc);
       CGF.EmitStoreOfScalar(Res, ElemPtr, /*Volatile=*/false, IntType);
-      Ptr = Bld.CreateConstGEP(Ptr, 1, CharUnits::fromQuantity(IntSize));
-      ElemPtr =
-          Bld.CreateConstGEP(ElemPtr, 1, CharUnits::fromQuantity(IntSize));
+      Ptr = Bld.CreateConstGEP(Ptr, 1);
+      ElemPtr = Bld.CreateConstGEP(ElemPtr, 1);
     }
     Size = Size % IntSize;
   }
@@ -2964,16 +2959,14 @@
     switch (Action) {
     case RemoteLaneToThread: {
       // Step 1.1: Get the address for the src element in the Reduce list.
-      Address SrcElementPtrAddr =
-          Bld.CreateConstArrayGEP(SrcBase, Idx, CGF.getPointerSize());
+      Address SrcElementPtrAddr = Bld.CreateConstArrayGEP(SrcBase, Idx);
       SrcElementAddr = CGF.EmitLoadOfPointer(
           SrcElementPtrAddr,
           C.getPointerType(Private->getType())->castAs<PointerType>());
 
       // Step 1.2: Create a temporary to store the element in the destination
       // Reduce list.
-      DestElementPtrAddr =
-          Bld.CreateConstArrayGEP(DestBase, Idx, CGF.getPointerSize());
+      DestElementPtrAddr = Bld.CreateConstArrayGEP(DestBase, Idx);
       DestElementAddr =
           CGF.CreateMemTemp(Private->getType(), ".omp.reduction.element");
       ShuffleInElement = true;
@@ -2982,16 +2975,14 @@
     }
     case ThreadCopy: {
       // Step 1.1: Get the address for the src element in the Reduce list.
-      Address SrcElementPtrAddr =
-          Bld.CreateConstArrayGEP(SrcBase, Idx, CGF.getPointerSize());
+      Address SrcElementPtrAddr = Bld.CreateConstArrayGEP(SrcBase, Idx);
       SrcElementAddr = CGF.EmitLoadOfPointer(
           SrcElementPtrAddr,
           C.getPointerType(Private->getType())->castAs<PointerType>());
 
       // Step 1.2: Get the address for dest element.  The destination
       // element has already been created on the thread's stack.
-      DestElementPtrAddr =
-          Bld.CreateConstArrayGEP(DestBase, Idx, CGF.getPointerSize());
+      DestElementPtrAddr = Bld.CreateConstArrayGEP(DestBase, Idx);
       DestElementAddr = CGF.EmitLoadOfPointer(
           DestElementPtrAddr,
           C.getPointerType(Private->getType())->castAs<PointerType>());
@@ -2999,8 +2990,7 @@
     }
     case ThreadToScratchpad: {
       // Step 1.1: Get the address for the src element in the Reduce list.
-      Address SrcElementPtrAddr =
-          Bld.CreateConstArrayGEP(SrcBase, Idx, CGF.getPointerSize());
+      Address SrcElementPtrAddr = Bld.CreateConstArrayGEP(SrcBase, Idx);
       SrcElementAddr = CGF.EmitLoadOfPointer(
           SrcElementPtrAddr,
           C.getPointerType(Private->getType())->castAs<PointerType>());
@@ -3035,8 +3025,7 @@
 
       // Step 1.2: Create a temporary to store the element in the destination
       // Reduce list.
-      DestElementPtrAddr =
-          Bld.CreateConstArrayGEP(DestBase, Idx, CGF.getPointerSize());
+      DestElementPtrAddr = Bld.CreateConstArrayGEP(DestBase, Idx);
       DestElementAddr =
           CGF.CreateMemTemp(Private->getType(), ".omp.reduction.element");
       UpdateDestListPtr = true;
@@ -3251,8 +3240,7 @@
       CGF.EmitBlock(ThenBB);
 
       // Reduce element = LocalReduceList[i]
-      Address ElemPtrPtrAddr =
-          Bld.CreateConstArrayGEP(LocalReduceList, Idx, CGF.getPointerSize());
+      Address ElemPtrPtrAddr = Bld.CreateConstArrayGEP(LocalReduceList, Idx);
       llvm::Value *ElemPtrPtr = CGF.EmitLoadOfScalar(
           ElemPtrPtrAddr, /*Volatile=*/false, C.VoidPtrTy, SourceLocation());
       // elemptr = ((CopyType*)(elemptrptr)) + I
@@ -3318,8 +3306,7 @@
       SrcMediumPtr = Bld.CreateElementBitCast(SrcMediumPtr, CopyType);
 
       // TargetElemPtr = (CopyType*)(SrcDataAddr[i]) + I
-      Address TargetElemPtrPtr =
-          Bld.CreateConstArrayGEP(LocalReduceList, Idx, CGF.getPointerSize());
+      Address TargetElemPtrPtr = Bld.CreateConstArrayGEP(LocalReduceList, Idx);
       llvm::Value *TargetElemPtrVal = CGF.EmitLoadOfScalar(
           TargetElemPtrPtr, /*Volatile=*/false, C.VoidPtrTy, Loc);
       Address TargetElemPtr = Address(TargetElemPtrVal, Align);
@@ -3865,8 +3852,7 @@
     auto IPriv = Privates.begin();
     unsigned Idx = 0;
     for (unsigned I = 0, E = RHSExprs.size(); I < E; ++I, ++IPriv, ++Idx) {
-      Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx,
-                                                     CGF.getPointerSize());
+      Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx);
       CGF.Builder.CreateStore(
           CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
               CGF.EmitLValue(RHSExprs[I]).getPointer(), CGF.VoidPtrTy),
@@ -3874,8 +3860,7 @@
       if ((*IPriv)->getType()->isVariablyModifiedType()) {
         // Store array size.
         ++Idx;
-        Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx,
-                                               CGF.getPointerSize());
+        Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx);
         llvm::Value *Size = CGF.Builder.CreateIntCast(
             CGF.getVLASize(
                    CGF.getContext().getAsVariableArrayType((*IPriv)->getType()))
@@ -4141,8 +4126,7 @@
   }
   unsigned Idx = 0;
   if (isOpenMPLoopBoundSharingDirective(D.getDirectiveKind())) {
-    Address Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx,
-                                             CGF.getPointerSize());
+    Address Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx);
     Address TypedAddress = Bld.CreatePointerBitCastOrAddrSpaceCast(
         Src, CGF.SizeTy->getPointerTo());
     llvm::Value *LB = CGF.EmitLoadOfScalar(
@@ -4152,8 +4136,7 @@
         cast<OMPLoopDirective>(D).getLowerBoundVariable()->getExprLoc());
     Args.emplace_back(LB);
     ++Idx;
-    Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx,
-                                     CGF.getPointerSize());
+    Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx);
     TypedAddress = Bld.CreatePointerBitCastOrAddrSpaceCast(
         Src, CGF.SizeTy->getPointerTo());
     llvm::Value *UB = CGF.EmitLoadOfScalar(
@@ -4168,8 +4151,7 @@
     ASTContext &CGFContext = CGF.getContext();
     for (unsigned I = 0, E = CS.capture_size(); I < E; ++I, ++CI, ++CurField) {
       QualType ElemTy = CurField->getType();
-      Address Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, I + Idx,
-                                               CGF.getPointerSize());
+      Address Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, I + Idx);
       Address TypedAddress = Bld.CreatePointerBitCastOrAddrSpaceCast(
           Src, CGF.ConvertTypeForMem(CGFContext.getPointerType(ElemTy)));
       llvm::Value *Arg = CGF.EmitLoadOfScalar(TypedAddress,
diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -3158,11 +3158,11 @@
     (void)Scope.Privatize();
     if (InputInfo.NumberOfTargetItems > 0) {
       InputInfo.BasePointersArray = CGF.Builder.CreateConstArrayGEP(
-          CGF.GetAddrOfLocalVar(BPVD), /*Index=*/0, CGF.getPointerSize());
+          CGF.GetAddrOfLocalVar(BPVD), /*Index=*/0);
       InputInfo.PointersArray = CGF.Builder.CreateConstArrayGEP(
-          CGF.GetAddrOfLocalVar(PVD), /*Index=*/0, CGF.getPointerSize());
+          CGF.GetAddrOfLocalVar(PVD), /*Index=*/0);
       InputInfo.SizesArray = CGF.Builder.CreateConstArrayGEP(
-          CGF.GetAddrOfLocalVar(SVD), /*Index=*/0, CGF.getSizeSize());
+          CGF.GetAddrOfLocalVar(SVD), /*Index=*/0);
     }
 
     Action.Enter(CGF);
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -2022,7 +2022,7 @@
   CGF.Builder.CreateStore(elementSize, cookie);
 
   // The second element is the element count.
-  cookie = CGF.Builder.CreateConstInBoundsGEP(cookie, 1, CGF.getSizeSize());
+  cookie = CGF.Builder.CreateConstInBoundsGEP(cookie, 1);
   CGF.Builder.CreateStore(numElements, cookie);
 
   // Finally, compute a pointer to the actual data buffer by skipping
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -3642,8 +3642,8 @@
 
 static Address EmitX86_64VAArgFromMemory(CodeGenFunction &CGF,
                                          Address VAListAddr, QualType Ty) {
-  Address overflow_arg_area_p = CGF.Builder.CreateStructGEP(
-      VAListAddr, 2, CharUnits::fromQuantity(8), "overflow_arg_area_p");
+  Address overflow_arg_area_p =
+      CGF.Builder.CreateStructGEP(VAListAddr, 2, "overflow_arg_area_p");
   llvm::Value *overflow_arg_area =
     CGF.Builder.CreateLoad(overflow_arg_area_p, "overflow_arg_area");
 
@@ -3714,18 +3714,14 @@
   Address gp_offset_p = Address::invalid(), fp_offset_p = Address::invalid();
   llvm::Value *gp_offset = nullptr, *fp_offset = nullptr;
   if (neededInt) {
-    gp_offset_p =
-        CGF.Builder.CreateStructGEP(VAListAddr, 0, CharUnits::Zero(),
-                                    "gp_offset_p");
+    gp_offset_p = CGF.Builder.CreateStructGEP(VAListAddr, 0, "gp_offset_p");
     gp_offset = CGF.Builder.CreateLoad(gp_offset_p, "gp_offset");
     InRegs = llvm::ConstantInt::get(CGF.Int32Ty, 48 - neededInt * 8);
     InRegs = CGF.Builder.CreateICmpULE(gp_offset, InRegs, "fits_in_gp");
   }
 
   if (neededSSE) {
-    fp_offset_p =
-        CGF.Builder.CreateStructGEP(VAListAddr, 1, CharUnits::fromQuantity(4),
-                                    "fp_offset_p");
+    fp_offset_p = CGF.Builder.CreateStructGEP(VAListAddr, 1, "fp_offset_p");
     fp_offset = CGF.Builder.CreateLoad(fp_offset_p, "fp_offset");
     llvm::Value *FitsInFP =
       llvm::ConstantInt::get(CGF.Int32Ty, 176 - neededSSE * 16);
@@ -3754,9 +3750,7 @@
   // loads than necessary. Can we clean this up?
   llvm::Type *LTy = CGF.ConvertTypeForMem(Ty);
   llvm::Value *RegSaveArea = CGF.Builder.CreateLoad(
-      CGF.Builder.CreateStructGEP(
-          VAListAddr, 3, CharUnits::fromQuantity(8) + CGF.getPointerSize()),
-      "reg_save_area");
+      CGF.Builder.CreateStructGEP(VAListAddr, 3), "reg_save_area");
 
   Address RegAddr = Address::invalid();
   if (neededInt && neededSSE) {
@@ -3782,16 +3776,13 @@
     llvm::Value *V = CGF.Builder.CreateAlignedLoad(
         TyLo, CGF.Builder.CreateBitCast(RegLoAddr, PTyLo),
         CharUnits::fromQuantity(getDataLayout().getABITypeAlignment(TyLo)));
-    CGF.Builder.CreateStore(V,
-                    CGF.Builder.CreateStructGEP(Tmp, 0, CharUnits::Zero()));
+    CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 0));
 
     // Copy the second element.
     V = CGF.Builder.CreateAlignedLoad(
         TyHi, CGF.Builder.CreateBitCast(RegHiAddr, PTyHi),
         CharUnits::fromQuantity(getDataLayout().getABITypeAlignment(TyHi)));
-    CharUnits Offset = CharUnits::fromQuantity(
-                   getDataLayout().getStructLayout(ST)->getElementOffset(1));
-    CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1, Offset));
+    CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1));
 
     RegAddr = CGF.Builder.CreateElementBitCast(Tmp, LTy);
   } else if (neededInt) {
@@ -3838,12 +3829,10 @@
     Tmp = CGF.Builder.CreateElementBitCast(Tmp, ST);
     V = CGF.Builder.CreateLoad(CGF.Builder.CreateElementBitCast(
         RegAddrLo, ST->getStructElementType(0)));
-    CGF.Builder.CreateStore(V,
-                   CGF.Builder.CreateStructGEP(Tmp, 0, CharUnits::Zero()));
+    CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 0));
     V = CGF.Builder.CreateLoad(CGF.Builder.CreateElementBitCast(
         RegAddrHi, ST->getStructElementType(1)));
-    CGF.Builder.CreateStore(V,
-          CGF.Builder.CreateStructGEP(Tmp, 1, CharUnits::fromQuantity(8)));
+    CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1));
 
     RegAddr = CGF.Builder.CreateElementBitCast(Tmp, LTy);
   }
@@ -4185,9 +4174,9 @@
   // The calling convention either uses 1-2 GPRs or 1 FPR.
   Address NumRegsAddr = Address::invalid();
   if (isInt || IsSoftFloatABI) {
-    NumRegsAddr = Builder.CreateStructGEP(VAList, 0, CharUnits::Zero(), "gpr");
+    NumRegsAddr = Builder.CreateStructGEP(VAList, 0, "gpr");
   } else {
-    NumRegsAddr = Builder.CreateStructGEP(VAList, 1, CharUnits::One(), "fpr");
+    NumRegsAddr = Builder.CreateStructGEP(VAList, 1, "fpr");
   }
 
   llvm::Value *NumRegs = Builder.CreateLoad(NumRegsAddr, "numUsedRegs");
@@ -4215,8 +4204,7 @@
   {
     CGF.EmitBlock(UsingRegs);
 
-    Address RegSaveAreaPtr =
-      Builder.CreateStructGEP(VAList, 4, CharUnits::fromQuantity(8));
+    Address RegSaveAreaPtr = Builder.CreateStructGEP(VAList, 4);
     RegAddr = Address(Builder.CreateLoad(RegSaveAreaPtr),
                       CharUnits::fromQuantity(8));
     assert(RegAddr.getElementType() == CGF.Int8Ty);
@@ -4264,8 +4252,7 @@
       Size = CGF.getPointerSize();
     }
 
-    Address OverflowAreaAddr =
-      Builder.CreateStructGEP(VAList, 3, CharUnits::fromQuantity(4));
+    Address OverflowAreaAddr = Builder.CreateStructGEP(VAList, 3);
     Address OverflowArea(Builder.CreateLoad(OverflowAreaAddr, "argp.cur"),
                          OverflowAreaAlign);
     // Round up address of argument to alignment
@@ -5305,25 +5292,18 @@
   Address reg_offs_p = Address::invalid();
   llvm::Value *reg_offs = nullptr;
   int reg_top_index;
-  CharUnits reg_top_offset;
   int RegSize = IsIndirect ? 8 : TyInfo.first.getQuantity();
   if (!IsFPR) {
     // 3 is the field number of __gr_offs
-    reg_offs_p =
-        CGF.Builder.CreateStructGEP(VAListAddr, 3, CharUnits::fromQuantity(24),
-                                    "gr_offs_p");
+    reg_offs_p = CGF.Builder.CreateStructGEP(VAListAddr, 3, "gr_offs_p");
     reg_offs = CGF.Builder.CreateLoad(reg_offs_p, "gr_offs");
     reg_top_index = 1; // field number for __gr_top
-    reg_top_offset = CharUnits::fromQuantity(8);
     RegSize = llvm::alignTo(RegSize, 8);
   } else {
     // 4 is the field number of __vr_offs.
-    reg_offs_p =
-        CGF.Builder.CreateStructGEP(VAListAddr, 4, CharUnits::fromQuantity(28),
-                                    "vr_offs_p");
+    reg_offs_p = CGF.Builder.CreateStructGEP(VAListAddr, 4, "vr_offs_p");
     reg_offs = CGF.Builder.CreateLoad(reg_offs_p, "vr_offs");
     reg_top_index = 2; // field number for __vr_top
-    reg_top_offset = CharUnits::fromQuantity(16);
     RegSize = 16 * NumRegs;
   }
 
@@ -5385,8 +5365,8 @@
   CGF.EmitBlock(InRegBlock);
 
   llvm::Value *reg_top = nullptr;
-  Address reg_top_p = CGF.Builder.CreateStructGEP(VAListAddr, reg_top_index,
-                                                  reg_top_offset, "reg_top_p");
+  Address reg_top_p =
+      CGF.Builder.CreateStructGEP(VAListAddr, reg_top_index, "reg_top_p");
   reg_top = CGF.Builder.CreateLoad(reg_top_p, "reg_top");
   Address BaseAddr(CGF.Builder.CreateInBoundsGEP(reg_top, reg_offs),
                    CharUnits::fromQuantity(IsFPR ? 16 : 8));
@@ -5426,8 +5406,7 @@
         CGF.Builder.CreateConstInBoundsByteGEP(BaseAddr, BaseOffset);
       LoadAddr = CGF.Builder.CreateElementBitCast(LoadAddr, BaseTy);
 
-      Address StoreAddr =
-        CGF.Builder.CreateConstArrayGEP(Tmp, i, BaseTyInfo.first);
+      Address StoreAddr = CGF.Builder.CreateConstArrayGEP(Tmp, i);
 
       llvm::Value *Elem = CGF.Builder.CreateLoad(LoadAddr);
       CGF.Builder.CreateStore(Elem, StoreAddr);
@@ -5456,8 +5435,7 @@
   //=======================================
   CGF.EmitBlock(OnStackBlock);
 
-  Address stack_p = CGF.Builder.CreateStructGEP(VAListAddr, 0,
-                                                CharUnits::Zero(), "stack_p");
+  Address stack_p = CGF.Builder.CreateStructGEP(VAListAddr, 0, "stack_p");
   llvm::Value *OnStackPtr = CGF.Builder.CreateLoad(stack_p, "stack");
 
   // Again, stack arguments may need realignment. In this case both integer and
@@ -6600,8 +6578,7 @@
     // Vector arguments are always passed in the high bits of a
     // single (8 byte) or double (16 byte) stack slot.
     Address OverflowArgAreaPtr =
-      CGF.Builder.CreateStructGEP(VAListAddr, 2, CharUnits::fromQuantity(16),
-                                  "overflow_arg_area_ptr");
+        CGF.Builder.CreateStructGEP(VAListAddr, 2, "overflow_arg_area_ptr");
     Address OverflowArgArea =
       Address(CGF.Builder.CreateLoad(OverflowArgAreaPtr, "overflow_arg_area"),
               TyInfo.second);
@@ -6633,9 +6610,8 @@
     RegPadding = Padding; // values are passed in the low bits of a GPR
   }
 
-  Address RegCountPtr = CGF.Builder.CreateStructGEP(
-      VAListAddr, RegCountField, RegCountField * CharUnits::fromQuantity(8),
-      "reg_count_ptr");
+  Address RegCountPtr =
+      CGF.Builder.CreateStructGEP(VAListAddr, RegCountField, "reg_count_ptr");
   llvm::Value *RegCount = CGF.Builder.CreateLoad(RegCountPtr, "reg_count");
   llvm::Value *MaxRegsV = llvm::ConstantInt::get(IndexTy, MaxRegs);
   llvm::Value *InRegs = CGF.Builder.CreateICmpULT(RegCount, MaxRegsV,
@@ -6658,8 +6634,7 @@
   llvm::Value *RegOffset =
     CGF.Builder.CreateAdd(ScaledRegCount, RegBase, "reg_offset");
   Address RegSaveAreaPtr =
-      CGF.Builder.CreateStructGEP(VAListAddr, 3, CharUnits::fromQuantity(24),
-                                  "reg_save_area_ptr");
+      CGF.Builder.CreateStructGEP(VAListAddr, 3, "reg_save_area_ptr");
   llvm::Value *RegSaveArea =
     CGF.Builder.CreateLoad(RegSaveAreaPtr, "reg_save_area");
   Address RawRegAddr(CGF.Builder.CreateGEP(RegSaveArea, RegOffset,
@@ -6679,8 +6654,8 @@
   CGF.EmitBlock(InMemBlock);
 
   // Work out the address of a stack argument.
-  Address OverflowArgAreaPtr = CGF.Builder.CreateStructGEP(
-      VAListAddr, 2, CharUnits::fromQuantity(16), "overflow_arg_area_ptr");
+  Address OverflowArgAreaPtr =
+      CGF.Builder.CreateStructGEP(VAListAddr, 2, "overflow_arg_area_ptr");
   Address OverflowArgArea =
     Address(CGF.Builder.CreateLoad(OverflowArgAreaPtr, "overflow_arg_area"),
             PaddedSize);