diff --git a/driver/cl_options.cpp b/driver/cl_options.cpp
index 6416e89e..0a10e807 100644
--- a/driver/cl_options.cpp
+++ b/driver/cl_options.cpp
@@ -2,7 +2,11 @@
 #include "gen/cl_helpers.h"
 
 #include "llvm/Target/TargetMachine.h"
+#if LDC_LLVM_VER >= 302
+#include "llvm/DataLayout.h"
+#else
 #include "llvm/Target/TargetData.h"
+#endif
 
 #include "gen/logger.h"
 
diff --git a/driver/main.cpp b/driver/main.cpp
index a277a424..15ddb5e0 100644
--- a/driver/main.cpp
+++ b/driver/main.cpp
@@ -238,7 +238,11 @@ int main(int argc, char** argv)
 
     // Handle fixed-up arguments!
     cl::SetVersionPrinter(&printVersion);
+#if LDC_LLVM_VER >= 302
+    cl::ParseCommandLineOptions(final_args.size(), const_cast<char**>(&final_args[0]), "LLVM-based D Compiler\n");
+#else
     cl::ParseCommandLineOptions(final_args.size(), const_cast<char**>(&final_args[0]), "LLVM-based D Compiler\n", true);
+#endif
 
     // Print config file path if -v was passed
     if (global.params.verbose) {
@@ -569,11 +573,15 @@ int main(int argc, char** argv)
 
     gTargetMachine = target;
 
-    gTargetData = target->getTargetData();
+#if LDC_LLVM_VER >= 302
+    gDataLayout = target->getDataLayout();
+#else
+    gDataLayout = target->getTargetData();
+#endif
 
-    global.params.isLE = gTargetData->isLittleEndian();
+    global.params.isLE = gDataLayout->isLittleEndian();
     // Starting with LLVM 3.1 we could also use global.params.targetTriple.isArch64Bit();
-    global.params.is64bit = gTargetData->getPointerSizeInBits() == 64;
+    global.params.is64bit = gDataLayout->getPointerSizeInBits() == 64;
     global.params.cpu = static_cast<ARCH>(global.params.targetTriple.getArch());
     global.params.os = static_cast<OS>(global.params.targetTriple.getOS());
 
diff --git a/driver/toobj.cpp b/driver/toobj.cpp
index 3cb0097b..a7047651 100644
--- a/driver/toobj.cpp
+++ b/driver/toobj.cpp
@@ -121,10 +121,17 @@ void emit_file(llvm::TargetMachine &Target, llvm::Module& m, llvm::raw_fd_ostrea
     // Build up all of the passes that we want to do to the module.
     FunctionPassManager Passes(&m);
 
+#if LDC_LLVM_VER >= 302
+    if (const DataLayout *DL = Target.getDataLayout())
+        Passes.add(new DataLayout(*DL));
+    else
+        Passes.add(new DataLayout(&m));
+#else
     if (const TargetData *TD = Target.getTargetData())
         Passes.add(new TargetData(*TD));
     else
         Passes.add(new TargetData(&m));
+#endif
 
     llvm::formatted_raw_ostream fout(out);
     if (Target.addPassesToEmitFile(Passes, fout, fileType, codeGenOptLevel()))
diff --git a/gen/abi-x86-64.cpp b/gen/abi-x86-64.cpp
index 86e83efa..74201404 100644
--- a/gen/abi-x86-64.cpp
+++ b/gen/abi-x86-64.cpp
@@ -526,13 +526,21 @@ void X86_64TargetABI::rewriteFunctionType(TypeFunction* tf) {
         if (fty.arg_this)
         {
             Logger::println("Putting 'this' in register");
+#if LDC_LLVM_VER >= 302
+            fty.arg_this->attrs = llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::InReg));
+#else
             fty.arg_this->attrs = llvm::Attribute::InReg;
+#endif
             --regcount;
         }
         else if (fty.arg_nest)
         {
             Logger::println("Putting context ptr in register");
+#if LDC_LLVM_VER >= 302
+            fty.arg_nest->attrs = llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::InReg));
+#else
             fty.arg_nest->attrs = llvm::Attribute::InReg;
+#endif
             --regcount;
         }
         else if (IrFuncTyArg* sret = fty.arg_sret)
@@ -540,8 +548,13 @@ void X86_64TargetABI::rewriteFunctionType(TypeFunction* tf) {
             Logger::println("Putting sret ptr in register");
             // sret and inreg are incompatible, but the ABI requires the
             // sret parameter to be in RDI in this situation...
+#if LDC_LLVM_VER >= 302
+            sret->attrs = llvm::Attributes::get(llvm::Attributes::Builder(sret->attrs).addAttribute(llvm::Attributes::InReg)
+                                                                                      .removeAttribute(llvm::Attributes::StructRet));
+#else
             sret->attrs = (sret->attrs | llvm::Attribute::InReg)
                             & ~llvm::Attribute::StructRet;
+#endif
             --regcount;
         }
 
@@ -558,7 +571,11 @@ void X86_64TargetABI::rewriteFunctionType(TypeFunction* tf) {
             {
                if (xmmcount > 0) {
                    Logger::println("Putting float parameter in register");
+#if LDC_LLVM_VER >= 302
+                   arg.attrs = llvm::Attributes::get(llvm::Attributes::Builder(arg.attrs).addAttribute(llvm::Attributes::InReg));
+#else
                    arg.attrs |= llvm::Attribute::InReg;
+#endif
                    --xmmcount;
                }
             }
@@ -569,19 +586,31 @@ void X86_64TargetABI::rewriteFunctionType(TypeFunction* tf) {
             else if (arg.byref && !arg.isByVal())
             {
                 Logger::println("Putting byref parameter in register");
+#if LDC_LLVM_VER >= 302
+                arg.attrs = llvm::Attributes::get(llvm::Attributes::Builder(arg.attrs).addAttribute(llvm::Attributes::InReg));
+#else
                 arg.attrs |= llvm::Attribute::InReg;
+#endif
                 --regcount;
             }
             else if (ty->ty == Tpointer)
             {
                 Logger::println("Putting pointer parameter in register");
+#if LDC_LLVM_VER >= 302
+                arg.attrs = llvm::Attributes::get(llvm::Attributes::Builder(arg.attrs).addAttribute(llvm::Attributes::InReg));
+#else
                 arg.attrs |= llvm::Attribute::InReg;
+#endif
                 --regcount;
             }
             else if (ty->isintegral() && sz <= 8)
             {
                 Logger::println("Putting integral parameter in register");
+#if LDC_LLVM_VER >= 302
+                arg.attrs = llvm::Attributes::get(llvm::Attributes::Builder(arg.attrs).addAttribute(llvm::Attributes::InReg));
+#else
                 arg.attrs |= llvm::Attribute::InReg;
+#endif
                 --regcount;
             }
             else if ((ty->ty == Tstruct || ty->ty == Tsarray) &&
@@ -591,7 +620,11 @@ void X86_64TargetABI::rewriteFunctionType(TypeFunction* tf) {
                 arg.rewrite = &compositeToInt;
                 arg.ltype = compositeToInt.type(arg.type, arg.ltype);
                 arg.byref = false;
+#if LDC_LLVM_VER >= 302
+                arg.attrs = llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::InReg));
+#else
                 arg.attrs = llvm::Attribute::InReg;
+#endif
                 --regcount;
             }
         }
diff --git a/gen/abi-x86.cpp b/gen/abi-x86.cpp
index edbfd1c3..368b7875 100644
--- a/gen/abi-x86.cpp
+++ b/gen/abi-x86.cpp
@@ -115,20 +115,33 @@ struct X86TargetABI : TargetABI
             if (fty.arg_this)
             {
                 Logger::println("Putting 'this' in register");
+#if LDC_LLVM_VER >= 302
+                fty.arg_this->attrs = llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::InReg));
+#else
                 fty.arg_this->attrs = llvm::Attribute::InReg;
+#endif
             }
             else if (fty.arg_nest)
             {
                 Logger::println("Putting context ptr in register");
+#if LDC_LLVM_VER >= 302
+                fty.arg_nest->attrs = llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::InReg));
+#else
                 fty.arg_nest->attrs = llvm::Attribute::InReg;
+#endif
             }
             else if (IrFuncTyArg* sret = fty.arg_sret)
             {
                 Logger::println("Putting sret ptr in register");
                 // sret and inreg are incompatible, but the ABI requires the
                 // sret parameter to be in EAX in this situation...
+#if LDC_LLVM_VER >= 302
+                sret->attrs = llvm::Attributes::get(llvm::Attributes::Builder(sret->attrs).addAttribute(llvm::Attributes::InReg)
+                                                                                          .removeAttribute(llvm::Attributes::StructRet));
+#else
                 sret->attrs = (sret->attrs | llvm::Attribute::InReg)
                                 & ~llvm::Attribute::StructRet;
+#endif
             }
             // otherwise try to mark the last param inreg
             else if (!fty.args.empty())
@@ -145,7 +158,11 @@ struct X86TargetABI : TargetABI
                 if (last->byref && !last->isByVal())
                 {
                     Logger::println("Putting last (byref) parameter in register");
+#if LDC_LLVM_VER >= 302
+                    last->attrs = llvm::Attributes::get(llvm::Attributes::Builder(last->attrs).addAttribute(llvm::Attributes::InReg));
+#else
                     last->attrs |= llvm::Attribute::InReg;
+#endif
                 }
                 else if (!lastTy->isfloating() && (sz == 1 || sz == 2 || sz == 4)) // right?
                 {
@@ -156,9 +173,17 @@ struct X86TargetABI : TargetABI
                         last->ltype = compositeToInt.type(last->type, last->ltype);
                         last->byref = false;
                         // erase previous attributes
+#if LDC_LLVM_VER >= 302
+                        last->attrs = llvm::Attributes();
+#else
                         last->attrs = llvm::Attribute::None;
+#endif
                     }
+#if LDC_LLVM_VER >= 302
+                    last->attrs = llvm::Attributes::get(llvm::Attributes::Builder(last->attrs).addAttribute(llvm::Attributes::InReg));
+#else
                     last->attrs |= llvm::Attribute::InReg;
+#endif
                 }
             }
 
diff --git a/gen/classes.cpp b/gen/classes.cpp
index 4db73d7f..2e268bea 100644
--- a/gen/classes.cpp
+++ b/gen/classes.cpp
@@ -558,7 +558,7 @@ static LLConstant* build_offti_entry(ClassDeclaration* cd, VarDeclaration* vd)
     //
     assert(vd->ir.irField);
     // grab the offset from llvm and the formal class type
-    size_t offset = gTargetData->getStructLayout(isaStruct(cd->type->ir.type->get()))->getElementOffset(vd->ir.irField->index);
+    size_t offset = gDataLayout->getStructLayout(isaStruct(cd->type->ir.type->get()))->getElementOffset(vd->ir.irField->index);
     // offset nested struct/union fields
     offset += vd->ir.irField->unionOffset;
 
diff --git a/gen/functions.cpp b/gen/functions.cpp
index 8b5754ce..79334f2c 100644
--- a/gen/functions.cpp
+++ b/gen/functions.cpp
@@ -25,7 +25,9 @@
 #include "gen/nested.h"
 #include "gen/pragma.h"
 
+#if LDC_LLVM_VER < 302
 using namespace llvm::Attribute;
+#endif
 
 llvm::FunctionType* DtoFunctionType(Type* type, Type* thistype, Type* nesttype, bool ismain)
 {
@@ -57,12 +59,22 @@ llvm::FunctionType* DtoFunctionType(Type* type, Type* thistype, Type* nesttype,
     else
     {
         Type* rt = f->next;
+#if LDC_LLVM_VER >= 302
+        llvm::Attributes a;
+#else
         llvm::Attributes a = None;
+#endif
 
         // sret return
         if (abi->returnInArg(f))
         {
+#if LDC_LLVM_VER >= 302
+            fty.arg_sret = new IrFuncTyArg(rt, true, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::StructRet)
+                                                                                                      .addAttribute(llvm::Attributes::NoAlias)
+                                                                                                      .addAttribute(llvm::Attributes::NoCapture)));
+#else
             fty.arg_sret = new IrFuncTyArg(rt, true, StructRet | NoAlias | NoCapture);
+#endif
             rt = Type::tvoid;
             lidx++;
         }
@@ -112,7 +124,13 @@ llvm::FunctionType* DtoFunctionType(Type* type, Type* thistype, Type* nesttype,
                 fty.arg_arguments = new IrFuncTyArg(Type::typeinfo->type->arrayOf(), false);
                 lidx++;
                 // _argptr
+#if LDC_LLVM_VER >= 302
+                fty.arg_argptr = new IrFuncTyArg(Type::tvoid->pointerTo(), false,
+                                                 llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoAlias)
+                                                                                                  .addAttribute(llvm::Attributes::NoCapture)));
+#else
                 fty.arg_argptr = new IrFuncTyArg(Type::tvoid->pointerTo(), false, NoAlias | NoCapture);
+#endif
                 lidx++;
             }
         }
@@ -146,7 +164,11 @@ llvm::FunctionType* DtoFunctionType(Type* type, Type* thistype, Type* nesttype,
 #endif
 
         Type* argtype = arg->type;
+#if LDC_LLVM_VER >= 302
+        llvm::Attributes a;
+#else
         llvm::Attributes a = None;
+#endif
 
         // handle lazy args
         if (arg->storageClass & STClazy)
@@ -159,7 +181,11 @@ llvm::FunctionType* DtoFunctionType(Type* type, Type* thistype, Type* nesttype,
         // byval
         else if (abi->passByVal(byref ? argtype->pointerTo() : argtype))
         {
+#if LDC_LLVM_VER >= 302
+            if (!byref) a = llvm::Attributes::get(llvm::Attributes::Builder(a).addAttribute(llvm::Attributes::ByVal));
+#else
             if (!byref) a |= llvm::Attribute::ByVal;
+#endif
             // set byref, because byval requires a pointed LLVM type
             byref = true;
         }
@@ -409,7 +435,11 @@ static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclarati
 
     // set attrs on the rest of the arguments
     size_t n = Parameter::dim(f->parameters);
+#if LDC_LLVM_VER >= 302
+    LLSmallVector<llvm::Attributes, 8> attrptr(n, llvm::Attributes());
+#else
     LLSmallVector<llvm::Attributes, 8> attrptr(n, None);
+#endif
 
     for (size_t k = 0; k < n; ++k)
     {
@@ -513,7 +543,11 @@ void DtoDeclareFunction(FuncDeclaration* fdecl)
     if (!fdecl->isIntrinsic()) {
         set_param_attrs(f, func, fdecl);
         if (global.params.disableRedZone) {
+#if LDC_LLVM_VER >= 302
+            func->addFnAttr(llvm::Attributes::NoRedZone);
+#else
             func->addFnAttr(NoRedZone);
+#endif
         }
     }
 
diff --git a/gen/irstate.cpp b/gen/irstate.cpp
index 73837b1f..ffd22751 100644
--- a/gen/irstate.cpp
+++ b/gen/irstate.cpp
@@ -17,7 +17,11 @@
 
 IRState* gIR = 0;
 llvm::TargetMachine* gTargetMachine = 0;
-const llvm::TargetData* gTargetData = 0;
+#if LDC_LLVM_VER >= 302
+const llvm::DataLayout* gDataLayout = 0;
+#else
+const llvm::TargetData* gDataLayout = 0;
+#endif
 TargetABI* gABI = 0;
 
 //////////////////////////////////////////////////////////////////////////////////////////
diff --git a/gen/irstate.h b/gen/irstate.h
index e4aa387c..2a19aaac 100644
--- a/gen/irstate.h
+++ b/gen/irstate.h
@@ -31,7 +31,11 @@ struct TargetABI;
 
 extern IRState* gIR;
 extern llvm::TargetMachine* gTargetMachine;
-extern const llvm::TargetData* gTargetData;
+#if LDC_LLVM_VER >= 302
+extern const llvm::DataLayout* gDataLayout;
+#else
+extern const llvm::TargetData* gDataLayout;
+#endif
 extern TargetABI* gABI;
 
 struct TypeFunction;
diff --git a/gen/llvm.h b/gen/llvm.h
index da9b652a..da582fe1 100644
--- a/gen/llvm.h
+++ b/gen/llvm.h
@@ -12,12 +12,12 @@
 #include "llvm/Value.h"
 #include "llvm/Attributes.h"
 
-#include "llvm/Target/TargetData.h"
-
 #if LDC_LLVM_VER >= 302
+#include "llvm/DataLayout.h"
 #include "llvm/DebugInfo.h"
 #include "llvm/IRBuilder.h"
 #else
+#include "llvm/Target/TargetData.h"
 #include "llvm/Analysis/DebugInfo.h"
 #include "llvm/Support/IRBuilder.h"
 #endif
diff --git a/gen/llvmhelpers.cpp b/gen/llvmhelpers.cpp
index a06dae59..114e2fd8 100644
--- a/gen/llvmhelpers.cpp
+++ b/gen/llvmhelpers.cpp
@@ -1114,7 +1114,7 @@ void DtoVarDeclaration(VarDeclaration* vd)
         LLType* lltype = DtoType(type);
 
         llvm::Value* allocainst;
-        if(gTargetData->getTypeSizeInBits(lltype) == 0)
+        if(gDataLayout->getTypeSizeInBits(lltype) == 0)
             allocainst = llvm::ConstantPointerNull::get(getPtrToType(lltype));
         else
             allocainst = DtoAlloca(type, vd->toChars());
@@ -1595,7 +1595,7 @@ void DtoOverloadedIntrinsicName(TemplateInstance* ti, TemplateDeclaration* td, s
     }
 
     char tmp[21]; // probably excessive, but covers a uint64_t
-    sprintf(tmp, "%lu", static_cast<unsigned long>(gTargetData->getTypeSizeInBits(DtoType(T))));
+    sprintf(tmp, "%lu", static_cast<unsigned long>(gDataLayout->getTypeSizeInBits(DtoType(T))));
 
     // replace # in name with bitsize
     name = td->intrinsicName;
@@ -1770,7 +1770,7 @@ size_t realignOffset(size_t offset, Type* type)
     }
 
     // then we check against the llvm alignment
-    size_t alignsize2 = gTargetData->getABITypeAlignment(T);
+    size_t alignsize2 = gDataLayout->getABITypeAlignment(T);
 
     // if it differs we need to insert manual padding as well
     if (alignsize != alignsize2)
diff --git a/gen/module.cpp b/gen/module.cpp
index e8b9c189..da6e1a50 100644
--- a/gen/module.cpp
+++ b/gen/module.cpp
@@ -2,7 +2,11 @@
 #include "llvm/Analysis/Verifier.h"
 #include "llvm/Module.h"
 #include "llvm/LinkAllPasses.h"
+#if LDC_LLVM_VER >= 302
+#include "llvm/DataLayout.h"
+#else
 #include "llvm/Target/TargetData.h"
+#endif
 
 #include "mars.h"
 #include "module.h"
@@ -245,7 +249,7 @@ llvm::Module* Module::genLLVMModule(llvm::LLVMContext& context, Ir* sir)
     ir.module->setTargetTriple(global.params.targetTriple.str());
 
     // set final data layout
-    ir.module->setDataLayout(gTargetData->getStringRepresentation());
+    ir.module->setDataLayout(gDataLayout->getStringRepresentation());
     if (Logger::enabled())
         Logger::cout() << "Final data layout: " << ir.module->getDataLayout() << '\n';
 
diff --git a/gen/optimizer.cpp b/gen/optimizer.cpp
index 331a92af..c5ae4a54 100644
--- a/gen/optimizer.cpp
+++ b/gen/optimizer.cpp
@@ -8,7 +8,11 @@
 #include "llvm/LinkAllPasses.h"
 #include "llvm/Analysis/LoopPass.h"
 #include "llvm/Analysis/Verifier.h"
+#if LDC_LLVM_VER >= 302
+#include "llvm/DataLayout.h"
+#else
 #include "llvm/Target/TargetData.h"
+#endif
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/PassNameParser.h"
 #include "llvm/Transforms/IPO.h"
@@ -274,7 +278,11 @@ bool ldc_optimize_module(llvm::Module* m)
 
     if (verifyEach) pm.add(createVerifierPass());
 
+#if LDC_LLVM_VER >= 302
+    addPass(pm, new DataLayout(m));
+#else
     addPass(pm, new TargetData(m));
+#endif
 
     bool optimize = optimizeLevel != 0 || doInline();
 
diff --git a/gen/passes/SimplifyDRuntimeCalls.cpp b/gen/passes/SimplifyDRuntimeCalls.cpp
index c2441ba5..98d7978a 100644
--- a/gen/passes/SimplifyDRuntimeCalls.cpp
+++ b/gen/passes/SimplifyDRuntimeCalls.cpp
@@ -28,7 +28,11 @@
 #endif
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/ValueTracking.h"
+#if LDC_LLVM_VER >= 302
+#include "llvm/DataLayout.h"
+#else
 #include "llvm/Target/TargetData.h"
+#endif
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/Compiler.h"
@@ -52,7 +56,11 @@ namespace {
     protected:
         Function *Caller;
         bool* Changed;
+#if LDC_LLVM_VER >= 302
+        const DataLayout *TD;
+#else
         const TargetData *TD;
+#endif
         AliasAnalysis *AA;
         LLVMContext *Context;
 
@@ -74,8 +82,13 @@ namespace {
         /// delete CI.
         virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B)=0;
 
+#if LDC_LLVM_VER >= 302
+        Value *OptimizeCall(CallInst *CI, bool& Changed, const DataLayout &TD,
+                AliasAnalysis& AA, IRBuilder<> &B) {
+#else
         Value *OptimizeCall(CallInst *CI, bool& Changed, const TargetData &TD,
                 AliasAnalysis& AA, IRBuilder<> &B) {
+#endif
             Caller = CI->getParent()->getParent();
             this->Changed = &Changed;
             this->TD = &TD;
@@ -101,7 +114,7 @@ Value *LibCallOptimization::EmitMemCpy(Value *Dst, Value *Src, Value *Len,
   Type *VoidPtrTy = PointerType::getUnqual(B.getInt8Ty());
   Type *Tys[3] ={VoidPtrTy, VoidPtrTy, intTy};
   Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, llvm::makeArrayRef(Tys, 3));
-  
+
   return B.CreateCall5(MemCpy, CastToCStr(Dst, B), CastToCStr(Src, B), Len,
                        ConstantInt::get(B.getInt32Ty(), Align), B.getFalse());
 }
@@ -296,10 +309,18 @@ namespace {
         void InitOptimizations();
         bool runOnFunction(Function &F);
 
+#if LDC_LLVM_VER >= 302
+        bool runOnce(Function &F, const DataLayout& DL, AliasAnalysis& AA);
+#else
         bool runOnce(Function &F, const TargetData& TD, AliasAnalysis& AA);
+#endif
 
         virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+#if LDC_LLVM_VER >= 302
+          AU.addRequired<DataLayout>();
+#else
           AU.addRequired<TargetData>();
+#endif
           AU.addRequired<AliasAnalysis>();
         }
     };
@@ -349,7 +370,11 @@ bool SimplifyDRuntimeCalls::runOnFunction(Function &F) {
     if (Optimizations.empty())
         InitOptimizations();
 
+#if LDC_LLVM_VER >= 302
+    const DataLayout &TD = getAnalysis<DataLayout>();
+#else
     const TargetData &TD = getAnalysis<TargetData>();
+#endif
     AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
 
     // Iterate to catch opportunities opened up by other optimizations,
@@ -367,7 +392,11 @@ bool SimplifyDRuntimeCalls::runOnFunction(Function &F) {
     return EverChanged;
 }
 
+#if LDC_LLVM_VER >= 302
+bool SimplifyDRuntimeCalls::runOnce(Function &F, const DataLayout& TD, AliasAnalysis& AA) {
+#else
 bool SimplifyDRuntimeCalls::runOnce(Function &F, const TargetData& TD, AliasAnalysis& AA) {
+#endif
     IRBuilder<> Builder(F.getContext());
 
     bool Changed = false;
diff --git a/gen/runtime.cpp b/gen/runtime.cpp
index 5763cf1e..589603c4 100644
--- a/gen/runtime.cpp
+++ b/gen/runtime.cpp
@@ -19,7 +19,9 @@
 #include "gen/irstate.h"
 #include "ir/irtype.h"
 
+#if LDC_LLVM_VER < 302
 using namespace llvm::Attribute;
+#endif
 
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
@@ -217,6 +219,40 @@ static void LLVM_D_BuildRuntimeModule()
     /////////////////////////////////////////////////////////////////////////////////////
 
     // Construct some attribute lists used below (possibly multiple times)
+#if LDC_LLVM_VER >= 302
+    llvm::AttrListPtr
+        NoAttrs,
+        Attr_NoAlias
+        = NoAttrs.addAttr(0, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoAlias))),
+        Attr_NoUnwind
+            = NoAttrs.addAttr(~0U, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoUnwind))),
+        Attr_ReadOnly
+            = NoAttrs.addAttr(~0U, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::ReadOnly))),
+        Attr_ReadOnly_NoUnwind
+            = Attr_ReadOnly.addAttr(~0U, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoUnwind))),
+        Attr_ReadOnly_1_NoCapture
+            = Attr_ReadOnly.addAttr(1, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_ReadOnly_1_3_NoCapture
+            = Attr_ReadOnly_1_NoCapture.addAttr(3, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_ReadOnly_1_4_NoCapture
+            = Attr_ReadOnly_1_NoCapture.addAttr(4, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_ReadOnly_NoUnwind_1_NoCapture
+            = Attr_ReadOnly_1_NoCapture.addAttr(~0U, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoUnwind))),
+        Attr_ReadNone
+            = NoAttrs.addAttr(~0U, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::ReadNone))),
+        Attr_1_NoCapture
+            = NoAttrs.addAttr(1, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_NoAlias_1_NoCapture
+            = Attr_1_NoCapture.addAttr(0, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoAlias))),
+        Attr_NoAlias_3_NoCapture
+            = Attr_NoAlias.addAttr(3, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_1_2_NoCapture
+            = Attr_1_NoCapture.addAttr(2, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_1_3_NoCapture
+            = Attr_1_NoCapture.addAttr(3, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture))),
+        Attr_1_4_NoCapture
+            = Attr_1_NoCapture.addAttr(4, llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::NoCapture)));
+#else
     llvm::AttrListPtr
         NoAttrs,
         Attr_NoAlias
@@ -249,6 +285,7 @@ static void LLVM_D_BuildRuntimeModule()
             = Attr_1_NoCapture.addAttr(3, NoCapture),
         Attr_1_4_NoCapture
             = Attr_1_NoCapture.addAttr(4, NoCapture);
+#endif
 
     /////////////////////////////////////////////////////////////////////////////////////
     /////////////////////////////////////////////////////////////////////////////////////
diff --git a/gen/structs.cpp b/gen/structs.cpp
index 93e9f103..96380838 100644
--- a/gen/structs.cpp
+++ b/gen/structs.cpp
@@ -275,7 +275,7 @@ std::vector<llvm::Value*> DtoStructLiteralValues(const StructDeclaration* sd,
         // sometimes size of the initializer is less than size of the variable,
         // so make sure that lastsize is correct
         if (inits[i]->getType()->isSized())
-            lastsize = ceil(gTargetData->getTypeSizeInBits(inits[i]->getType()) / 8.0);
+            lastsize = ceil(gDataLayout->getTypeSizeInBits(inits[i]->getType()) / 8.0);
         else
 #endif
         lastsize = sz;
diff --git a/gen/tocall.cpp b/gen/tocall.cpp
index 6d6ff765..23cd54d7 100644
--- a/gen/tocall.cpp
+++ b/gen/tocall.cpp
@@ -397,8 +397,13 @@ DValue* DtoCallFunction(Loc& loc, Type* resulttype, DValue* fnval, Expressions*
         // add attrs for hidden ptr
         Attr.Index = 1;
         Attr.Attrs = tf->fty.arg_sret->attrs;
+#if LDC_LLVM_VER >= 302
+        assert((Attr.Attrs.hasAttribute(llvm::Attributes::StructRet) || Attr.Attrs.hasAttribute(llvm::Attributes::InReg))
+            && "Sret arg not sret or inreg?");
+#else
         assert((Attr.Attrs & (llvm::Attribute::StructRet | llvm::Attribute::InReg))
             && "Sret arg not sret or inreg?");
+#endif
         attrs.push_back(Attr);
     }
 
@@ -510,7 +515,11 @@ DValue* DtoCallFunction(Loc& loc, Type* resulttype, DValue* fnval, Expressions*
         }
 
         size_t n = Parameter::dim(tf->parameters);
+#if LDC_LLVM_VER >= 302
+        LLSmallVector<llvm::Attributes, 10> attrptr(n, llvm::Attributes());
+#else
         LLSmallVector<llvm::Attributes, 10> attrptr(n, llvm::Attribute::None);
+#endif
         std::vector<DValue*> argvals;
         if (dfnval && dfnval->func->isArrayOp) {
             // slightly different approach for array operators
diff --git a/gen/todebug.h b/gen/todebug.h
index 77b9071e..ec69bc2f 100644
--- a/gen/todebug.h
+++ b/gen/todebug.h
@@ -60,7 +60,7 @@ void dwarfOpOffset(T &addr, LLStructType *type, int index)
     if (!global.params.symdebug)
         return;
 
-    uint64_t offset = gTargetData->getStructLayout(type)->getElementOffset(index);
+    uint64_t offset = gDataLayout->getStructLayout(type)->getElementOffset(index);
     LLType *int64Ty = LLType::getInt64Ty(gIR->context());
     addr.push_back(LLConstantInt::get(int64Ty, llvm::DIBuilder::OpPlus));
     addr.push_back(LLConstantInt::get(int64Ty, offset));
diff --git a/gen/tollvm.cpp b/gen/tollvm.cpp
index 01342cec..b26dd5a9 100644
--- a/gen/tollvm.cpp
+++ b/gen/tollvm.cpp
@@ -43,14 +43,26 @@ llvm::Attributes DtoShouldExtend(Type* type)
         {
         case Tint8:
         case Tint16:
+#if LDC_LLVM_VER >= 302
+            return llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::SExt));
+#else
             return llvm::Attribute::SExt;
+#endif
 
         case Tuns8:
         case Tuns16:
+#if LDC_LLVM_VER >= 302
+            return llvm::Attributes::get(llvm::Attributes::Builder().addAttribute(llvm::Attributes::ZExt));
+#else
             return llvm::Attribute::ZExt;
+#endif
         }
     }
+#if LDC_LLVM_VER >= 302
+    return llvm::Attributes();
+#else
     return llvm::Attribute::None;
+#endif
 }
 
 LLType* DtoType(Type* t)
@@ -864,34 +876,34 @@ LLConstant* getNullValue(LLType* t)
 
 size_t getTypeBitSize(LLType* t)
 {
-    return gTargetData->getTypeSizeInBits(t);
+    return gDataLayout->getTypeSizeInBits(t);
 }
 
 size_t getTypeStoreSize(LLType* t)
 {
-    return gTargetData->getTypeStoreSize(t);
+    return gDataLayout->getTypeStoreSize(t);
 }
 
 size_t getTypePaddedSize(LLType* t)
 {
-    size_t sz = gTargetData->getTypeAllocSize(t);
+    size_t sz = gDataLayout->getTypeAllocSize(t);
     //Logger::cout() << "abi type size of: " << *t << " == " << sz << '\n';
     return sz;
 }
 
 size_t getTypeAllocSize(LLType* t)
 {
-    return gTargetData->getTypeAllocSize(t);
+    return gDataLayout->getTypeAllocSize(t);
 }
 
 unsigned char getABITypeAlign(LLType* t)
 {
-    return gTargetData->getABITypeAlignment(t);
+    return gDataLayout->getABITypeAlignment(t);
 }
 
 unsigned char getPrefTypeAlign(LLType* t)
 {
-    return gTargetData->getPrefTypeAlignment(t);
+    return gDataLayout->getPrefTypeAlignment(t);
 }
 
 LLType* getBiggestType(LLType** begin, size_t n)
diff --git a/ir/ir.cpp b/ir/ir.cpp
index 16589223..7c4d3f90 100644
--- a/ir/ir.cpp
+++ b/ir/ir.cpp
@@ -1,4 +1,8 @@
+#if LDC_LLVM_VER >= 302
+#include "llvm/DataLayout.h"
+#else
 #include "llvm/Target/TargetData.h"
+#endif
 
 #include "gen/irstate.h"
 #include "gen/tollvm.h"
@@ -10,22 +14,22 @@
 
 unsigned GetTypeAlignment(Ir* ir, Type* t)
 {
-    return gTargetData->getABITypeAlignment(DtoType(t));
+    return gDataLayout->getABITypeAlignment(DtoType(t));
 }
 
 unsigned GetPointerSize(Ir* ir)
 {
-    return gTargetData->getPointerSize();
+    return gDataLayout->getPointerSize();
 }
 
 unsigned GetTypeStoreSize(Ir* ir, Type* t)
 {
-    return gTargetData->getTypeStoreSize(DtoType(t));
+    return gDataLayout->getTypeStoreSize(DtoType(t));
 }
 
 unsigned GetTypeAllocSize(Ir* ir, Type* t)
 {
-    return gTargetData->getTypeAllocSize(DtoType(t));
+    return gDataLayout->getTypeAllocSize(DtoType(t));
 }
 
 Ir::Ir()
diff --git a/ir/irforw.h b/ir/irforw.h
index 747714a1..720d2790 100644
--- a/ir/irforw.h
+++ b/ir/irforw.h
@@ -33,7 +33,11 @@ namespace llvm
     class Constant;
     class ConstantStruct;
     class ConstantArray;
+#if LDC_LLVM_VER >= 302
+    class DataLayout;
+#else
     class TargetData;
+#endif
     class Type;
     class StructType;
     class ArrayType;
diff --git a/ir/irfunction.cpp b/ir/irfunction.cpp
index 6b56c86b..99a59f69 100644
--- a/ir/irfunction.cpp
+++ b/ir/irfunction.cpp
@@ -21,9 +21,15 @@ IrFuncTyArg::IrFuncTyArg(Type* t, bool bref, llvm::Attributes a) : type(t)
     rewrite = NULL;
 }
 
+#if LDC_LLVM_VER >= 302
+bool IrFuncTyArg::isInReg() const { return attrs.hasAttribute(llvm::Attributes::InReg); }
+bool IrFuncTyArg::isSRet() const  { return attrs.hasAttribute(llvm::Attributes::StructRet); }
+bool IrFuncTyArg::isByVal() const { return attrs.hasAttribute(llvm::Attributes::ByVal); }
+#else
 bool IrFuncTyArg::isInReg() const { return (attrs & llvm::Attribute::InReg) != 0; }
 bool IrFuncTyArg::isSRet() const  { return (attrs & llvm::Attribute::StructRet) != 0; }
 bool IrFuncTyArg::isByVal() const { return (attrs & llvm::Attribute::ByVal) != 0; }
+#endif
 
 //////////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////////////////////////////////////////
@@ -152,19 +158,21 @@ IrFunction::IrFunction(FuncDeclaration* fd)
 void IrFunction::setNeverInline()
 {
 #if LDC_LLVM_VER >= 302
-    assert(!func->getFnAttributes().hasAlwaysInlineAttr() && "function can't be never- and always-inline at the same time");
+    assert(!func->getFnAttributes().hasAttribute(llvm::Attributes::AlwaysInline) && "function can't be never- and always-inline at the same time");
+    func->addFnAttr(llvm::Attributes::NoInline);
 #else
     assert(!func->hasFnAttr(llvm::Attribute::AlwaysInline) && "function can't be never- and always-inline at the same time");
-#endif
     func->addFnAttr(llvm::Attribute::NoInline);
+#endif
 }
 
 void IrFunction::setAlwaysInline()
 {
 #if LDC_LLVM_VER >= 302
-    assert(!func->getFnAttributes().hasNoInlineAttr() && "function can't be never- and always-inline at the same time");
+    assert(!func->getFnAttributes().hasAttribute(llvm::Attributes::NoInline) && "function can't be never- and always-inline at the same time");
+    func->addFnAttr(llvm::Attributes::AlwaysInline);
 #else
     assert(!func->hasFnAttr(llvm::Attribute::NoInline) && "function can't be never- and always-inline at the same time");
-#endif
     func->addFnAttr(llvm::Attribute::AlwaysInline);
+#endif
 }
diff --git a/ir/irfuncty.h b/ir/irfuncty.h
index 10fb1eec..22fbdf2e 100644
--- a/ir/irfuncty.h
+++ b/ir/irfuncty.h
@@ -51,7 +51,11 @@ struct IrFuncTyArg : IrBase
      *  @param byref Initial value for the 'byref' field. If true the initial
      *               LLVM Type will be of DtoType(type->pointerTo()), instead
      *               of just DtoType(type) */
+#if LDC_LLVM_VER >= 302
+    IrFuncTyArg(Type* t, bool byref, llvm::Attributes a = llvm::Attributes());
+#else
     IrFuncTyArg(Type* t, bool byref, llvm::Attributes a = llvm::Attribute::None);
+#endif
 };
 
 // represents a function type