#include <llvm/Config/llvm-config.h>
#include <llvm/IR/IRBuilder.h>
#include <llvm/Target/TargetMachine.h>
#include <llvm-c/TargetMachine.h>

using namespace llvm;

#define LLVM_VERSION_GE(major, minor) \
  (LLVM_VERSION_MAJOR > (major) || LLVM_VERSION_MAJOR == (major) && LLVM_VERSION_MINOR >= (minor))

#if !LLVM_VERSION_GE(9, 0)
#include <llvm/IR/DIBuilder.h>
#endif

#if LLVM_VERSION_GE(16, 0)
#define makeArrayRef ArrayRef
#endif

#if !LLVM_VERSION_GE(18, 0)
typedef struct LLVMOpaqueOperandBundle *LLVMOperandBundleRef;
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(OperandBundleDef, LLVMOperandBundleRef)
#endif

extern "C" {

#if !LLVM_VERSION_GE(9, 0)
LLVMMetadataRef LLVMExtDIBuilderCreateEnumerator(LLVMDIBuilderRef Builder,
                                                 const char *Name, size_t NameLen,
                                                 int64_t Value,
                                                 LLVMBool IsUnsigned) {
  return wrap(unwrap(Builder)->createEnumerator({Name, NameLen}, Value,
                                                IsUnsigned != 0));
}

void LLVMExtClearCurrentDebugLocation(LLVMBuilderRef B) {
  unwrap(B)->SetCurrentDebugLocation(DebugLoc::get(0, 0, nullptr));
}
#endif

#if !LLVM_VERSION_GE(18, 0)
LLVMOperandBundleRef LLVMExtCreateOperandBundle(const char *Tag, size_t TagLen,
                                                LLVMValueRef *Args,
                                                unsigned NumArgs) {
  return wrap(new OperandBundleDef(std::string(Tag, TagLen),
                                   makeArrayRef(unwrap(Args), NumArgs)));
}

void LLVMExtDisposeOperandBundle(LLVMOperandBundleRef Bundle) {
  delete unwrap(Bundle);
}

LLVMValueRef
LLVMExtBuildCallWithOperandBundles(LLVMBuilderRef B, LLVMTypeRef Ty,
                                   LLVMValueRef Fn, LLVMValueRef *Args,
                                   unsigned NumArgs, LLVMOperandBundleRef *Bundles,
                                   unsigned NumBundles, const char *Name) {
  FunctionType *FTy = unwrap<FunctionType>(Ty);
  SmallVector<OperandBundleDef, 8> OBs;
  for (auto *Bundle : makeArrayRef(Bundles, NumBundles)) {
    OperandBundleDef *OB = unwrap(Bundle);
    OBs.push_back(*OB);
  }
  return wrap(unwrap(B)->CreateCall(
      FTy, unwrap(Fn), makeArrayRef(unwrap(Args), NumArgs), OBs, Name));
}

LLVMValueRef LLVMExtBuildInvokeWithOperandBundles(
    LLVMBuilderRef B, LLVMTypeRef Ty, LLVMValueRef Fn, LLVMValueRef *Args,
    unsigned NumArgs, LLVMBasicBlockRef Then, LLVMBasicBlockRef Catch,
    LLVMOperandBundleRef *Bundles, unsigned NumBundles, const char *Name) {
  SmallVector<OperandBundleDef, 8> OBs;
  for (auto *Bundle : makeArrayRef(Bundles, NumBundles)) {
    OperandBundleDef *OB = unwrap(Bundle);
    OBs.push_back(*OB);
  }
  return wrap(unwrap(B)->CreateInvoke(
      unwrap<FunctionType>(Ty), unwrap(Fn), unwrap(Then), unwrap(Catch),
      makeArrayRef(unwrap(Args), NumArgs), OBs, Name));
}
#endif

#if !LLVM_VERSION_GE(18, 0)
static TargetMachine *unwrap(LLVMTargetMachineRef P) {
  return reinterpret_cast<TargetMachine *>(P);
}

void LLVMExtSetTargetMachineGlobalISel(LLVMTargetMachineRef T, LLVMBool Enable) {
  unwrap(T)->setGlobalISel(Enable);
}
#endif

} // extern "C"