Regressed by https://github.com/llvm/llvm-project/commit/2e97d2aa1bd3

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::MatchFinder::addMatcher(clang::ast_matchers::internal::Matcher<clang::Stmt> const&, clang::ast_matchers::MatchFinder::MatchCallback*)

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::MatchFinder::MatchCallback::~MatchCallback()

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::MatchFinder::match(clang::ast_type_traits::DynTypedNode const&, clang::ASTContext&)

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::MatchFinder::MatchFinder(clang::ast_matchers::MatchFinder::MatchFinderOptions)

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::MatchFinder::~MatchFinder()

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::cxxMethodDecl

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::cxxRecordDecl

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::unaryOperator

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::cxxConstructExpr

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::cxxConstructorDecl

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::cxxOperatorCallExpr

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::expr

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::allOf

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::anyOf

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::eachOf

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::unless

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::varDecl

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::callExpr

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::castExpr

ld: error: backend/src/libgbe.so: undefined reference to clang::ast_matchers::internal::hasAnyNameFunc(llvm::ArrayRef<llvm::StringRef const*>)

ld: error: too many errors emitted, stopping now (use -error-limit=0 to see all errors)

c++: error: linker command failed with exit code 1 (use -v to see invocation)

Regressed by https://github.com/llvm/llvm-project/commit/13680223b9d8

backend/src/llvm/llvm_intrinsic_lowering.cpp:80:19: error:

      no viable conversion from 'llvm::FunctionCallee' to 'llvm::Constant *'

        Constant* FCache = M->getOrInsertFunction(NewFn,

                  ^        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

backend/src/llvm/llvm_sampler_fix.cpp:85:18: error:

      no viable conversion from 'llvm::FunctionCallee' to 'llvm::Value *'

  ...Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

            ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

backend/src/llvm/llvm_sampler_fix.cpp:127:18: error:

      no viable conversion from 'llvm::FunctionCallee' to 'llvm::Value *'

  ...Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

            ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

backend/src/llvm/llvm_profiling.cpp:166:27: error: no

      matching function for call to 'cast'

      builder->CreateCall(cast<llvm::Function>(module->getOrInsertFunction(

                          ^~~~~~~~~~~~~~~~~~~~

backend/src/llvm/llvm_device_enqueue.cpp:401:52: error:

      no matching function for call to 'cast'

              CallInst* newCI = builder.CreateCall(cast<llvm::Function>(mod->getOrInsertFunction(

                                                   ^~~~~~~~~~~~~~~~~~~~

/usr/local/llvm90/include/llvm/Support/Casting.h:256:44: note: candidate function [with X = llvm::Function, Y

      = llvm::FunctionCallee] not viable: expects an l-value for 1st argument

inline typename cast_retty<X, Y>::ret_type cast(Y &Val) {

                                           ^

/usr/local/llvm90/include/llvm/Support/Casting.h:249:1: note: candidate template ignored: requirement

      '!is_simple_type<llvm::FunctionCallee>::value' was not satisfied [with X = llvm::Function, Y =

      llvm::FunctionCallee]

cast(const Y &Val) {

^

/usr/local/llvm90/include/llvm/Support/Casting.h:263:46: note: candidate template ignored: could not match

      'Y *' against 'llvm::FunctionCallee'

inline typename cast_retty<X, Y *>::ret_type cast(Y *Val) {

                                             ^

/usr/local/llvm90/include/llvm/Support/Casting.h:271:1: note: candidate template ignored: could not match

      'unique_ptr<type-parameter-0-1, default_delete<type-parameter-0-1> >' against 'llvm::FunctionCallee'

cast(std::unique_ptr<Y> &&Val) {

^

backend/src/llvm/llvm_profiling.cpp:188:25: error: no

      matching function for call to 'cast'

    builder->CreateCall(cast<llvm::Function>(module->getOrInsertFunction(

                        ^~~~~~~~~~~~~~~~~~~~

/usr/local/llvm90/include/llvm/Support/Casting.h:256:44: note: candidate function [with X = llvm::Function, Y

      = llvm::FunctionCallee] not viable: expects an l-value for 1st argument

inline typename cast_retty<X, Y>::ret_type cast(Y &Val) {

                                           ^

/usr/local/llvm90/include/llvm/Support/Casting.h:249:1: note: candidate template ignored: requirement

      '!is_simple_type<llvm::FunctionCallee>::value' was not satisfied [with X = llvm::Function, Y =

      llvm::FunctionCallee]

cast(const Y &Val) {

^

/usr/local/llvm90/include/llvm/Support/Casting.h:263:46: note: candidate template ignored: could not match

      'Y *' against 'llvm::FunctionCallee'

inline typename cast_retty<X, Y *>::ret_type cast(Y *Val) {

                                             ^

/usr/local/llvm90/include/llvm/Support/Casting.h:271:1: note: candidate template ignored: could not match

      'unique_ptr<type-parameter-0-1, default_delete<type-parameter-0-1> >' against 'llvm::FunctionCallee'

cast(std::unique_ptr<Y> &&Val) {

^

--- CMake/FindLLVM.cmake.orig	2017-09-22 08:05:22 UTC

+++ CMake/FindLLVM.cmake

@@ -116,6 +116,9 @@ macro(add_one_lib name)

 endmacro()

 #Assume clang lib path same as llvm lib path

+if (LLVM_VERSION_NODOT VERSION_GREATER 80)

+add_one_lib("clang-cpp")

+endif (LLVM_VERSION_NODOT VERSION_GREATER 80)

 add_one_lib("clangCodeGen")

 add_one_lib("clangFrontend")

 add_one_lib("clangSerialization")

--- backend/src/llvm/llvm_intrinsic_lowering.cpp.orig	2017-10-24 06:04:48 UTC

+++ backend/src/llvm/llvm_intrinsic_lowering.cpp

@@ -77,7 +77,11 @@ namespace gbe {

         std::vector<Type *> ParamTys;

         for (Value** I = ArgBegin; I != ArgEnd; ++I)

           ParamTys.push_back((*I)->getType());

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+        FunctionCallee FCache = M->getOrInsertFunction(NewFn,

+#else

         Constant* FCache = M->getOrInsertFunction(NewFn,

+#endif

                                         FunctionType::get(RetTy, ParamTys, false));

         IRBuilder<> Builder(CI->getParent(), BasicBlock::iterator(CI));

--- backend/src/llvm/llvm_sampler_fix.cpp.orig	2017-10-24 06:04:48 UTC

+++ backend/src/llvm/llvm_sampler_fix.cpp

@@ -82,7 +82,11 @@ namespace gbe {

 #if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 40

           Module *M = I->getParent()->getParent()->getParent();

 #if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 50

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+          FunctionCallee samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

+#else

           Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

+#endif

 #else

           Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType(), nullptr);

 #endif

@@ -124,7 +128,11 @@ namespace gbe {

 #if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 40

           Module *M = I->getParent()->getParent()->getParent();

 #if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 50

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+          FunctionCallee samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

+#else

           Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

+#endif

 #else

           Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType(), nullptr);

 #endif

--- backend/src/llvm/llvm_profiling.cpp.orig	2017-10-24 06:04:48 UTC

+++ backend/src/llvm/llvm_profiling.cpp

@@ -163,10 +163,18 @@ namespace gbe

       // __gen_ocl_store_timestamp(int nth, int type);

       Value *Args[2] = {ConstantInt::get(intTy, pointNum++), ConstantInt::get(intTy, profilingType)};

 #if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 50

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+      builder->CreateCall(module->getOrInsertFunction(

+#else

       builder->CreateCall(cast<llvm::Function>(module->getOrInsertFunction(

+#endif

               "__gen_ocl_calc_timestamp", Type::getVoidTy(module->getContext()),

               IntegerType::getInt32Ty(module->getContext()),

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+              IntegerType::getInt32Ty(module->getContext())),

+#else

               IntegerType::getInt32Ty(module->getContext()))),

+#endif

               ArrayRef<Value*>(Args));

 #else

       builder->CreateCall(cast<llvm::Function>(module->getOrInsertFunction(

@@ -185,10 +193,18 @@ namespace gbe

     Value *Args2[2] = {profilingBuf, ConstantInt::get(intTy, profilingType)};

 #if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 50

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+    builder->CreateCall(module->getOrInsertFunction(

+#else

     builder->CreateCall(cast<llvm::Function>(module->getOrInsertFunction(

+#endif

             "__gen_ocl_store_profiling", Type::getVoidTy(module->getContext()),

             ptrTy,

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+            IntegerType::getInt32Ty(module->getContext())),

+#else

             IntegerType::getInt32Ty(module->getContext()))),

+#endif

             ArrayRef<Value*>(Args2));

 #else

     builder->CreateCall(cast<llvm::Function>(module->getOrInsertFunction(

--- backend/src/llvm/llvm_device_enqueue.cpp.orig	2017-10-24 06:04:48 UTC

+++ backend/src/llvm/llvm_device_enqueue.cpp

@@ -398,8 +398,13 @@ namespace gbe {

               std::vector<Type *> ParamTys;

               for (Value** iter = args.begin(); iter != args.end(); ++iter)

                 ParamTys.push_back((*iter)->getType());

+#if LLVM_VERSION_MAJOR * 10 + LLVM_VERSION_MINOR >= 90

+              CallInst* newCI = builder.CreateCall(mod->getOrInsertFunction(

+                              "__gen_enqueue_kernel_slm", FunctionType::get(intTy, ParamTys, false)), args);

+#else

               CallInst* newCI = builder.CreateCall(cast<llvm::Function>(mod->getOrInsertFunction(

                               "__gen_enqueue_kernel_slm", FunctionType::get(intTy, ParamTys, false))), args);

+#endif

               CI->replaceAllUsesWith(newCI);

               deadInsnSet.insert(CI);

             }