diff --git a/dmd2/module.c b/dmd2/module.c
index a0b5db62..5525e679 100644
--- a/dmd2/module.c
+++ b/dmd2/module.c
@@ -47,9 +47,15 @@
 #endif
 
 #if IN_LLVM
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Type.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/DerivedTypes.h"
+#else
 #include "llvm/Type.h"
 #include "llvm/LLVMContext.h"
 #include "llvm/DerivedTypes.h"
+#endif
 #include "llvm/Support/CommandLine.h"
 #include <map>
 
diff --git a/driver/cl_options.cpp b/driver/cl_options.cpp
index bd3bd5c1..e1307680 100644
--- a/driver/cl_options.cpp
+++ b/driver/cl_options.cpp
@@ -11,7 +11,9 @@
 #include "gen/cl_helpers.h"
 
 #include "llvm/Target/TargetMachine.h"
-#if LDC_LLVM_VER >= 302
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DataLayout.h"
+#elif LDC_LLVM_VER == 302
 #include "llvm/DataLayout.h"
 #else
 #include "llvm/Target/TargetData.h"
diff --git a/driver/main.cpp b/driver/main.cpp
index e2618598..84a91b2d 100644
--- a/driver/main.cpp
+++ b/driver/main.cpp
@@ -9,9 +9,14 @@
 
 #include "gen/llvmcompat.h"
 #include "gen/llvm.h"
-#include "llvm/LinkAllVMCore.h"
 #include "llvm/Linker.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/LinkAllIR.h"
+#include "llvm/IR/LLVMContext.h"
+#else
+#include "llvm/LinkAllVMCore.h"
 #include "llvm/LLVMContext.h"
+#endif
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/Support/TargetSelect.h"
diff --git a/gen/asmstmt.cpp b/gen/asmstmt.cpp
index 7c117ca0..0bf99941 100644
--- a/gen/asmstmt.cpp
+++ b/gen/asmstmt.cpp
@@ -8,7 +8,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "gen/llvm.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/InlineAsm.h"
+#else
 #include "llvm/InlineAsm.h"
+#endif
 
 //#include "d-gcc-includes.h"
 //#include "total.h"
diff --git a/gen/functions.cpp b/gen/functions.cpp
index cbabfba2..f3bf2571 100644
--- a/gen/functions.cpp
+++ b/gen/functions.cpp
@@ -9,7 +9,11 @@
 
 #include "gen/llvm.h"
 #include "llvm/Support/CFG.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Intrinsics.h"
+#else
 #include "llvm/Intrinsics.h"
+#endif
 
 #include "mtype.h"
 #include "aggregate.h"
@@ -345,7 +349,11 @@ LLFunction* DtoInlineIRFunction(FuncDeclaration* fdecl)
     if(errstr != "")
         error(tinst->loc,
             "can't parse inline LLVM IR:\n%s\n%s\n%s\nThe input string was: \n%s",
+#if LDC_LLVM_VER >= 303
+            err.getLineContents().str().c_str(),
+#else
             err.getLineContents().c_str(),
+#endif
             (std::string(err.getColumnNo(), ' ') + '^').c_str(),
             errstr.c_str(), stream.str().c_str());
 
diff --git a/gen/llvm.h b/gen/llvm.h
index 7fda1d71..f0b207f8 100644
--- a/gen/llvm.h
+++ b/gen/llvm.h
@@ -29,6 +29,9 @@
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Value.h"
 #include "llvm/IR/Attributes.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/DebugInfo.h"
 #else
 #include "llvm/Type.h"
 #include "llvm/DerivedTypes.h"
@@ -40,17 +43,17 @@
 #include "llvm/Module.h"
 #include "llvm/Value.h"
 #include "llvm/Attributes.h"
-#endif
-
-#if LDC_LLVM_VER >= 302
+#if LDC_LLVM_VER == 302
 #include "llvm/DataLayout.h"
-#include "llvm/DebugInfo.h"
 #include "llvm/IRBuilder.h"
+#include "llvm/DebugInfo.h"
 #else
 #include "llvm/Target/TargetData.h"
 #include "llvm/Analysis/DebugInfo.h"
 #include "llvm/Support/IRBuilder.h"
 #endif
+#endif
+
 
 #include "gen/llvmcompat.h"
 
diff --git a/gen/llvmcompat.cpp b/gen/llvmcompat.cpp
index 96bd86f6..5ad3561c 100644
--- a/gen/llvmcompat.cpp
+++ b/gen/llvmcompat.cpp
@@ -10,14 +10,21 @@
 #include "gen/llvmcompat.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/ADT/Triple.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/IRBuilder.h"
+#else
 #include "llvm/DerivedTypes.h"
 #include "llvm/Function.h"
 #include "llvm/Module.h"
-#if LDC_LLVM_VER >= 302
+#if LDC_LLVM_VER == 302
 #include "llvm/IRBuilder.h"
 #else
 #include "llvm/Support/IRBuilder.h"
 #endif
+#endif
 #include <string>
 
 #if LDC_LLVM_VER == 300
diff --git a/gen/llvmhelpers.cpp b/gen/llvmhelpers.cpp
index 1a2a7725..3e1be0c9 100644
--- a/gen/llvmhelpers.cpp
+++ b/gen/llvmhelpers.cpp
@@ -1645,7 +1645,7 @@ bool mustDefineSymbol(Dsymbol* s)
     {
         // we can't (and probably shouldn't?) define functions
         // that weren't semantic3'ed
-        if (fd->semanticRun < 4)
+        if (fd->semanticRun < PASSsemantic3)
             return false;
 
         if (fd->isArrayOp == 1)
@@ -1669,7 +1669,7 @@ bool mustDefineSymbol(Dsymbol* s)
             if (   !fd->isStaticCtorDeclaration()
                 && !fd->isStaticDtorDeclaration()
                 && !fd->isUnitTestDeclaration()
-                && fd->canInline(true))
+                && fd->canInline(true, false, false))
             {
                 return true;
             }
diff --git a/gen/logger.cpp b/gen/logger.cpp
index 6f737c46..a16e94cf 100644
--- a/gen/logger.cpp
+++ b/gen/logger.cpp
@@ -19,7 +19,11 @@
 
 #include "llvm/Support/CommandLine.h"
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/GlobalValue.h"
+#else
 #include "llvm/GlobalValue.h"
+#endif
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/raw_os_ostream.h"
 #include "llvm/Assembly/Writer.h"
diff --git a/gen/metadata.h b/gen/metadata.h
index 1239946a..d2523907 100644
--- a/gen/metadata.h
+++ b/gen/metadata.h
@@ -17,7 +17,11 @@
 #define LDC_GEN_METADATA_H
 
 // MDNode was moved into its own header, and contains Value*s
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Metadata.h"
+#else
 #include "llvm/Metadata.h"
+#endif
 typedef llvm::Value MDNodeField;
 
 #define METADATA_LINKAGE_TYPE  llvm::GlobalValue::WeakODRLinkage
diff --git a/gen/module.cpp b/gen/module.cpp
index 70031fcf..f09157d8 100644
--- a/gen/module.cpp
+++ b/gen/module.cpp
@@ -9,13 +9,18 @@
 
 #include "gen/llvm.h"
 #include "llvm/Analysis/Verifier.h"
-#include "llvm/Module.h"
 #include "llvm/LinkAllPasses.h"
-#if LDC_LLVM_VER >= 302
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Module.h"
+#include "llvm/IR/DataLayout.h"
+#else
+#include "llvm/Module.h"
+#if LDC_LLVM_VER == 302
 #include "llvm/DataLayout.h"
 #else
 #include "llvm/Target/TargetData.h"
 #endif
+#endif
 
 #include "mars.h"
 #include "module.h"
diff --git a/gen/naked.cpp b/gen/naked.cpp
index fbe201ff..24fac77b 100644
--- a/gen/naked.cpp
+++ b/gen/naked.cpp
@@ -8,7 +8,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "gen/llvm.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/InlineAsm.h"
+#else
 #include "llvm/InlineAsm.h"
+#endif
 
 #include "expression.h"
 #include "statement.h"
diff --git a/gen/optimizer.cpp b/gen/optimizer.cpp
index 8dbc2d04..4f5ac5f4 100644
--- a/gen/optimizer.cpp
+++ b/gen/optimizer.cpp
@@ -17,16 +17,17 @@
 #include "llvm/LinkAllPasses.h"
 #if LDC_LLVM_VER >= 303
 #include "llvm/IR/Module.h"
+#include "llvm/IR/DataLayout.h"
 #else
 #include "llvm/Module.h"
-#endif
-#include "llvm/ADT/Triple.h"
-#include "llvm/Analysis/Verifier.h"
-#if LDC_LLVM_VER >= 302
+#if LDC_LLVM_VER == 302
 #include "llvm/DataLayout.h"
 #else
 #include "llvm/Target/TargetData.h"
 #endif
+#endif
+#include "llvm/ADT/Triple.h"
+#include "llvm/Analysis/Verifier.h"
 #include "llvm/Target/TargetLibraryInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/CommandLine.h"
diff --git a/gen/passes/GarbageCollect2Stack.cpp b/gen/passes/GarbageCollect2Stack.cpp
index d32c8c9b..65f3bd3c 100644
--- a/gen/passes/GarbageCollect2Stack.cpp
+++ b/gen/passes/GarbageCollect2Stack.cpp
@@ -27,14 +27,17 @@
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/DataLayout.h"
 #else
 #include "llvm/Module.h"
 #include "llvm/Constants.h"
 #include "llvm/Intrinsics.h"
 #if LDC_LLVM_VER == 302
 #include "llvm/IRBuilder.h"
+#include "llvm/DataLayout.h"
 #else
 #include "llvm/Support/IRBuilder.h"
+#include "llvm/Target/TargetData.h"
 #endif
 #endif
 #include "llvm/Support/CallSite.h"
@@ -42,11 +45,6 @@
 #include "llvm/Analysis/CallGraph.h"
 #include "llvm/Analysis/Dominators.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/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
diff --git a/gen/passes/SimplifyDRuntimeCalls.cpp b/gen/passes/SimplifyDRuntimeCalls.cpp
index 2d5e0293..eeacab26 100644
--- a/gen/passes/SimplifyDRuntimeCalls.cpp
+++ b/gen/passes/SimplifyDRuntimeCalls.cpp
@@ -23,22 +23,20 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/DataLayout.h"
 #else
 #include "llvm/Function.h"
 #include "llvm/Intrinsics.h"
 #if LDC_LLVM_VER == 302
 #include "llvm/IRBuilder.h"
+#include "llvm/DataLayout.h"
 #else
 #include "llvm/Support/IRBuilder.h"
+#include "llvm/Target/TargetData.h"
 #endif
 #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"
diff --git a/gen/passes/StripExternals.cpp b/gen/passes/StripExternals.cpp
index fdd0dd85..adcb9a1d 100644
--- a/gen/passes/StripExternals.cpp
+++ b/gen/passes/StripExternals.cpp
@@ -19,7 +19,11 @@
 
 #include "Passes.h"
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Module.h"
+#else
 #include "llvm/Module.h"
+#endif
 #include "llvm/Pass.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/Compiler.h"
diff --git a/gen/rttibuilder.h b/gen/rttibuilder.h
index 8bb47b29..5d7eeeb1 100644
--- a/gen/rttibuilder.h
+++ b/gen/rttibuilder.h
@@ -15,7 +15,11 @@
 #ifndef __LDC_GEN_RTTIBUILDER_H__
 #define __LDC_GEN_RTTIBUILDER_H__
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Constant.h"
+#else
 #include "llvm/Constant.h"
+#endif
 #include "llvm/ADT/SmallVector.h"
 
 struct ClassDeclaration;
diff --git a/gen/runtime.cpp b/gen/runtime.cpp
index c3bd93ec..41df1e95 100644
--- a/gen/runtime.cpp
+++ b/gen/runtime.cpp
@@ -8,8 +8,13 @@
 //===----------------------------------------------------------------------===//
 
 #include "gen/llvm.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Attributes.h"
+#else
 #include "llvm/Module.h"
 #include "llvm/Attributes.h"
+#endif
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/CommandLine.h"
diff --git a/gen/statements.cpp b/gen/statements.cpp
index a96c09d3..8c6fbeee 100644
--- a/gen/statements.cpp
+++ b/gen/statements.cpp
@@ -13,7 +13,11 @@
 #include <fstream>
 
 #include "gen/llvm.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/InlineAsm.h"
+#else
 #include "llvm/InlineAsm.h"
+#endif
 #include "llvm/Support/CFG.h"
 
 #include "mars.h"
diff --git a/gen/tollvm.cpp b/gen/tollvm.cpp
index d8d3e86d..12f1937e 100644
--- a/gen/tollvm.cpp
+++ b/gen/tollvm.cpp
@@ -688,24 +688,13 @@ LLConstant* DtoConstFP(Type* t, longdouble value)
 
 //////////////////////////////////////////////////////////////////////////////////////////
 
-#if LDC_LLVM_VER >= 301
-static inline LLConstant* toConstString(llvm::LLVMContext& ctx, const llvm::StringRef& str)
-{
-    LLSmallVector<uint8_t, 64> vals;
-    vals.append(str.begin(), str.end());
-    vals.push_back(0);
-    return llvm::ConstantDataArray::get(ctx, vals);
-}
-#endif
-
 LLConstant* DtoConstString(const char* str)
 {
+    llvm::StringRef s(str ? str : "");
 #if LDC_LLVM_VER == 300
-    llvm::StringRef s(str?str:"");
     LLConstant* init = LLConstantArray::get(gIR->context(), s, true);
 #else
-    llvm::StringRef s(str ? str : "");
-    LLConstant* init = toConstString(gIR->context(), s);
+    LLConstant* init = llvm::ConstantDataArray::getString(gIR->context(), s, true);
 #endif
     llvm::GlobalVariable* gvar = new llvm::GlobalVariable(
         *gIR->module, init->getType(), true, llvm::GlobalValue::InternalLinkage, init, ".str");
@@ -716,14 +705,14 @@ LLConstant* DtoConstString(const char* str)
         Type::tchar->arrayOf()
     );
 }
+
 LLConstant* DtoConstStringPtr(const char* str, const char* section)
 {
+   llvm::StringRef s(str);
 #if LDC_LLVM_VER == 300
-    llvm::StringRef s(str);
     LLConstant* init = LLConstantArray::get(gIR->context(), s, true);
 #else
-    llvm::StringRef s(str);
-    LLConstant* init = toConstString(gIR->context(), s);
+   LLConstant* init = llvm::ConstantDataArray::getString(gIR->context(), s, true);
 #endif
     llvm::GlobalVariable* gvar = new llvm::GlobalVariable(
         *gIR->module, init->getType(), true, llvm::GlobalValue::InternalLinkage, init, ".str");
diff --git a/ir/ir.cpp b/ir/ir.cpp
index 6dc953c0..e50246da 100644
--- a/ir/ir.cpp
+++ b/ir/ir.cpp
@@ -7,7 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if LDC_LLVM_VER >= 302
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DataLayout.h"
+#elif LDC_LLVM_VER == 302
 #include "llvm/DataLayout.h"
 #else
 #include "llvm/Target/TargetData.h"
diff --git a/ir/irclass.cpp b/ir/irclass.cpp
index 1e03ab03..219f92f5 100644
--- a/ir/irclass.cpp
+++ b/ir/irclass.cpp
@@ -7,8 +7,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+#else
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
+#endif
 #include "llvm/ADT/SmallString.h"
 
 #include "aggregate.h"
diff --git a/ir/irtype.cpp b/ir/irtype.cpp
index 324cbb2b..0fa6df0c 100644
--- a/ir/irtype.cpp
+++ b/ir/irtype.cpp
@@ -7,8 +7,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/LLVMContext.h"
+#else
 #include "llvm/DerivedTypes.h"
 #include "llvm/LLVMContext.h"
+#endif
 #include "mars.h"
 #include "mtype.h"
 #include "gen/irstate.h"
diff --git a/ir/irtype.h b/ir/irtype.h
index a85a760b..14e5c6a7 100644
--- a/ir/irtype.h
+++ b/ir/irtype.h
@@ -16,7 +16,11 @@
 #ifndef __LDC_IR_IRTYPE_H__
 #define __LDC_IR_IRTYPE_H__
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Type.h"
+#else
 #include "llvm/Type.h"
+#endif
 
 //////////////////////////////////////////////////////////////////////////////
 
diff --git a/ir/irtypeclass.cpp b/ir/irtypeclass.cpp
index 90eca230..49635811 100644
--- a/ir/irtypeclass.cpp
+++ b/ir/irtypeclass.cpp
@@ -7,7 +7,11 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DerivedTypes.h"
+#else
 #include "llvm/DerivedTypes.h"
+#endif
 
 #include "aggregate.h"
 #include "declaration.h"
diff --git a/ir/irtypeclass.h b/ir/irtypeclass.h
index 346e3068..11b1371a 100644
--- a/ir/irtypeclass.h
+++ b/ir/irtypeclass.h
@@ -15,7 +15,11 @@
 #define __LDC_IR_IRTYPECLASS_H__
 
 #include "ir/irtypestruct.h"
+#if LDC_LLVM_VER >= 303
+#include <llvm/IR/DerivedTypes.h>
+#else
 #include <llvm/DerivedTypes.h>
+#endif
 
 ///
 class IrTypeClass : public IrTypeAggr
diff --git a/ir/irtypefunction.cpp b/ir/irtypefunction.cpp
index 1479814b..66fda0c2 100644
--- a/ir/irtypefunction.cpp
+++ b/ir/irtypefunction.cpp
@@ -7,7 +7,11 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DerivedTypes.h"
+#else
 #include "llvm/DerivedTypes.h"
+#endif
 #include "mtype.h"
 
 #include "gen/irstate.h"
diff --git a/ir/irtypestruct.cpp b/ir/irtypestruct.cpp
index 4b5edbe6..e46cdc9d 100644
--- a/ir/irtypestruct.cpp
+++ b/ir/irtypestruct.cpp
@@ -7,7 +7,11 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/DerivedTypes.h"
+#else
 #include "llvm/DerivedTypes.h"
+#endif
 
 #include "aggregate.h"
 #include "declaration.h"
diff --git a/ir/irvar.h b/ir/irvar.h
index dbd29dd2..8b12e8b3 100644
--- a/ir/irvar.h
+++ b/ir/irvar.h
@@ -16,7 +16,11 @@
 #define LDC_IR_IRVAR_H
 
 #include "ir/ir.h"
+#if LDC_LLVM_VER >= 303
+#include "llvm/IR/Type.h"
+#else
 #include "llvm/Type.h"
+#endif
 
 struct IrFuncTyArg;
 
diff --git a/runtime/druntime b/runtime/druntime
index e2d17024..e415c4d0 160000
--- a/runtime/druntime
+++ b/runtime/druntime
@@ -1 +1 @@
-Subproject commit e2d17024e257830c02af1efbd3c384aea2b641c9
+Subproject commit e415c4d0af3220043355f6805d3d5674a47d994e