diff --git a/backend/src/backend/gen_program.cpp b/backend/src/backend/gen_program.cpp
index 099116c..9526227 100644
--- a/backend/src/backend/gen_program.cpp
+++ b/backend/src/backend/gen_program.cpp
@@ -61,6 +61,8 @@
 #include <clang/CodeGen/CodeGenAction.h>
 #endif
 
+#include <llvm/Linker/Linker.h>
+
 #include <cstring>
 #include <sstream>
 #include <memory>
@@ -305,7 +307,11 @@ namespace gbe {
     //the first byte stands for binary_type.
     binary_content.assign(binary+1, size-1);
     llvm::StringRef llvm_bin_str(binary_content);
+#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 9
+    llvm::LLVMContext c;
+#else
     llvm::LLVMContext& c = llvm::getGlobalContext();
+#endif
     llvm::SMDiagnostic Err;
 #if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 6
     std::unique_ptr<llvm::MemoryBuffer> memory_buffer = llvm::MemoryBuffer::getMemBuffer(llvm_bin_str, "llvm_bin_str");
@@ -460,7 +466,9 @@ namespace gbe {
       llvm::Module* src = (llvm::Module*)((GenProgram*)src_program)->module;
       llvm::Module* dst = (llvm::Module*)((GenProgram*)dst_program)->module;
 
-#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 7
+#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 9
+      if (llvm::Linker::linkModules(*dst, std::unique_ptr<llvm::Module>(src), 0)) {
+#elif LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 7
       if (LLVMLinkModules(wrap(dst), wrap(src), LLVMLinkerPreserveSource_Removed, &errMsg)) {
 #else
       if (LLVMLinkModules(wrap(dst), wrap(src), LLVMLinkerPreserveSource, &errMsg)) {
diff --git a/backend/src/backend/program.cpp b/backend/src/backend/program.cpp
index 60a7dcf..0ba5e72 100644
--- a/backend/src/backend/program.cpp
+++ b/backend/src/backend/program.cpp
@@ -982,7 +982,12 @@ namespace gbe {
     //FIXME: if use new allocated context to link two modules there would be context mismatch
     //for some functions, so we use global context now, need switch to new context later.
     llvm::Module * out_module;
+#if (LLVM_VERSION_MAJOR == 3) && (LLVM_VERSION_MINOR > 8)
+    llvm::LLVMContext llvm_context;
+    llvm::LLVMContext* llvm_ctx = &llvm_context;
+#else
     llvm::LLVMContext* llvm_ctx = &llvm::getGlobalContext();
+#endif
 
     if (buildModuleFromSource(source, &out_module, llvm_ctx, dumpLLVMFileName, dumpSPIRBinaryName, clOpt,
                               stringSize, err, errSize)) {
diff --git a/backend/src/llvm/llvm_bitcode_link.cpp b/backend/src/llvm/llvm_bitcode_link.cpp
index 5f087f8..13ff8b2 100644
--- a/backend/src/llvm/llvm_bitcode_link.cpp
+++ b/backend/src/llvm/llvm_bitcode_link.cpp
@@ -27,6 +27,9 @@
 #include "llvm_includes.hpp"
 #include "llvm/llvm_gen_backend.hpp"
 
+#include <llvm/Linker/Linker.h>
+#include <llvm/Transforms/IPO.h>
+
 using namespace llvm;
 
 SVAR(OCL_BITCODE_LIB_PATH, OCL_BITCODE_BIN);
@@ -262,12 +265,17 @@ namespace gbe
     if(clonedLib->getDataLayout() != mod->getDataLayout())
       mod->setDataLayout(clonedLib->getDataLayout());
 
+#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 9
+    if(Linker::linkModules(*clonedLib, std::unique_ptr<Module>(mod), 0)) {
+#else
     /* We use beignet's bitcode as dst because it will have a lot of
        lazy functions which will not be loaded. */
     char* errorMsg;
     if(LLVMLinkModules(wrap(clonedLib), wrap(mod), LLVMLinkerDestroySource, &errorMsg)) {
-      delete clonedLib;
       printf("Fatal Error: link the bitcode error:\n%s\n", errorMsg);
+#endif
+
+      delete clonedLib;
       return NULL;
     }
 #if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >=7
@@ -276,7 +284,11 @@ namespace gbe
     llvm::PassManager passes;
 #endif
 
+#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 9
+    passes.add(createInternalizePass([](const GlobalValue &){ return true; }));
+#else
     passes.add(createInternalizePass(kernels));
+#endif
     passes.add(createGlobalDCEPass());
 
     passes.run(*clonedLib);
diff --git a/backend/src/llvm/llvm_to_gen.cpp b/backend/src/llvm/llvm_to_gen.cpp
index 653fc09..25884ae 100644
--- a/backend/src/llvm/llvm_to_gen.cpp
+++ b/backend/src/llvm/llvm_to_gen.cpp
@@ -37,6 +37,9 @@
 #include <fcntl.h>
 #include <memory>
 
+#include <llvm/Transforms/Scalar/GVN.h>
+#include <llvm/Transforms/IPO/FunctionAttrs.h>
+
 namespace gbe
 {
   BVAR(OCL_OUTPUT_CFG, false);
@@ -140,7 +143,9 @@ namespace gbe
     MPM.add(createBarrierNodupPass(false));   // remove noduplicate fnAttr before inlining.
     MPM.add(createFunctionInliningPass(20000));
     MPM.add(createBarrierNodupPass(true));    // restore noduplicate fnAttr after inlining.
-#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 8
+#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 9
+    MPM.add(createPostOrderFunctionAttrsLegacyPass());       // Set readonly/readnone attrs
+#elif LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 8
     MPM.add(createPostOrderFunctionAttrsPass());       // Set readonly/readnone attrs
 #else
     MPM.add(createFunctionAttrsPass());       // Set readonly/readnone attrs
@@ -262,7 +267,13 @@ namespace gbe
     if (module) {
       cl_mod = reinterpret_cast<Module*>(const_cast<void*>(module));
     } else if (fileName){
+
+#if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >=9
+      llvm::LLVMContext c;
+#else
       llvm::LLVMContext& c = llvm::getGlobalContext();
+#endif
+
 #if LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 6
       cl_mod = parseIRFile(fileName, Err, c).release();
 #else