/*===-- llvm_ocaml.c - LLVM OCaml Glue --------------------------*- C++ -*-===*\
|*                                                                            *|
|*                     The LLVM Compiler Infrastructure                       *|
|*                                                                            *|
|* This file is distributed under the University of Illinois Open Source      *|
|* License. See LICENSE.TXT for details.                                      *|
|*                                                                            *|
|*===----------------------------------------------------------------------===*|
|*                                                                            *|
|* This file glues LLVM's OCaml interface to its C interface. These functions *|
|* are by and large transparent wrappers to the corresponding C functions.    *|
|*                                                                            *|
|* Note that these functions intentionally take liberties with the CAMLparamX *|
|* macros, since most of the parameters are not GC heap objects.              *|
|*                                                                            *|
\*===----------------------------------------------------------------------===*/

#include "llvm-c/Core.h"
#include "caml/alloc.h"
#include "caml/custom.h"
#include "caml/memory.h"
#include "caml/fail.h"
#include "caml/callback.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>


/* Can't use the recommended caml_named_value mechanism for backwards
   compatibility reasons. This is largely equivalent. */
static value llvm_ioerror_exn;

CAMLprim value llvm_register_core_exns(value IoError) {
  llvm_ioerror_exn = Field(IoError, 0);
  register_global_root(&llvm_ioerror_exn);

  return Val_unit;
}

static void llvm_raise(value Prototype, char *Message) {
  CAMLparam1(Prototype);
  CAMLlocal1(CamlMessage);
  
  CamlMessage = copy_string(Message);
  LLVMDisposeMessage(Message);
  
  raise_with_arg(Prototype, CamlMessage);
  abort(); /* NOTREACHED */
#ifdef CAMLnoreturn
  CAMLnoreturn; /* Silences warnings, but is missing in some versions. */
#endif
}

static value llvm_fatal_error_handler;

static void llvm_fatal_error_trampoline(const char *Reason) {
  callback(llvm_fatal_error_handler, copy_string(Reason));
}

CAMLprim value llvm_install_fatal_error_handler(value Handler) {
  LLVMInstallFatalErrorHandler(llvm_fatal_error_trampoline);
  llvm_fatal_error_handler = Handler;
  caml_register_global_root(&llvm_fatal_error_handler);
  return Val_unit;
}

CAMLprim value llvm_reset_fatal_error_handler(value Unit) {
  caml_remove_global_root(&llvm_fatal_error_handler);
  LLVMResetFatalErrorHandler();
  return Val_unit;
}

CAMLprim value llvm_enable_pretty_stacktrace(value Unit) {
  LLVMEnablePrettyStackTrace();
  return Val_unit;
}

static value alloc_variant(int tag, void *Value) {
  value Iter = alloc_small(1, tag);
  Field(Iter, 0) = Val_op(Value);
  return Iter;
}

/* Macro to convert the C first/next/last/prev idiom to the Ocaml llpos/
   llrev_pos idiom. */
#define DEFINE_ITERATORS(camlname, cname, pty, cty, pfun) \
  /* llmodule -> ('a, 'b) llpos */                        \
  CAMLprim value llvm_##camlname##_begin(pty Mom) {       \
    cty First = LLVMGetFirst##cname(Mom);                 \
    if (First)                                            \
      return alloc_variant(1, First);                     \
    return alloc_variant(0, Mom);                         \
  }                                                       \
                                                          \
  /* llvalue -> ('a, 'b) llpos */                         \
  CAMLprim value llvm_##camlname##_succ(cty Kid) {        \
    cty Next = LLVMGetNext##cname(Kid);                   \
    if (Next)                                             \
      return alloc_variant(1, Next);                      \
    return alloc_variant(0, pfun(Kid));                   \
  }                                                       \
                                                          \
  /* llmodule -> ('a, 'b) llrev_pos */                    \
  CAMLprim value llvm_##camlname##_end(pty Mom) {         \
    cty Last = LLVMGetLast##cname(Mom);                   \
    if (Last)                                             \
      return alloc_variant(1, Last);                      \
    return alloc_variant(0, Mom);                         \
  }                                                       \
                                                          \
  /* llvalue -> ('a, 'b) llrev_pos */                     \
  CAMLprim value llvm_##camlname##_pred(cty Kid) {        \
    cty Prev = LLVMGetPrevious##cname(Kid);               \
    if (Prev)                                             \
      return alloc_variant(1, Prev);                      \
    return alloc_variant(0, pfun(Kid));                   \
  }


/*===-- Contexts ----------------------------------------------------------===*/

/* unit -> llcontext */
CAMLprim LLVMContextRef llvm_create_context(value Unit) {
  return LLVMContextCreate();
}

/* llcontext -> unit */
CAMLprim value llvm_dispose_context(LLVMContextRef C) {
  LLVMContextDispose(C);
  return Val_unit;
}

/* unit -> llcontext */
CAMLprim LLVMContextRef llvm_global_context(value Unit) {
  return LLVMGetGlobalContext();
}

/* llcontext -> string -> int */
CAMLprim value llvm_mdkind_id(LLVMContextRef C, value Name) {
  unsigned MDKindID = LLVMGetMDKindIDInContext(C, String_val(Name),
                                               caml_string_length(Name));
  return Val_int(MDKindID);
}

/*===-- Modules -----------------------------------------------------------===*/

/* llcontext -> string -> llmodule */
CAMLprim LLVMModuleRef llvm_create_module(LLVMContextRef C, value ModuleID) {
  return LLVMModuleCreateWithNameInContext(String_val(ModuleID), C);
}

/* llmodule -> unit */
CAMLprim value llvm_dispose_module(LLVMModuleRef M) {
  LLVMDisposeModule(M);
  return Val_unit;
}

/* llmodule -> string */
CAMLprim value llvm_target_triple(LLVMModuleRef M) {
  return copy_string(LLVMGetTarget(M));
}

/* string -> llmodule -> unit */
CAMLprim value llvm_set_target_triple(value Trip, LLVMModuleRef M) {
  LLVMSetTarget(M, String_val(Trip));
  return Val_unit;
}

/* llmodule -> string */
CAMLprim value llvm_data_layout(LLVMModuleRef M) {
  return copy_string(LLVMGetDataLayout(M));
}

/* string -> llmodule -> unit */
CAMLprim value llvm_set_data_layout(value Layout, LLVMModuleRef M) {
  LLVMSetDataLayout(M, String_val(Layout));
  return Val_unit;
}

/* llmodule -> unit */
CAMLprim value llvm_dump_module(LLVMModuleRef M) {
  LLVMDumpModule(M);
  return Val_unit;
}

/* string -> llmodule -> unit */
CAMLprim value llvm_print_module(value Filename, LLVMModuleRef M) {
  char* Message;
  if(LLVMPrintModuleToFile(M, String_val(Filename), &Message)) {
    llvm_raise(llvm_ioerror_exn, Message);
  }

  return Val_unit;
}

/* llmodule -> string */
CAMLprim value llvm_string_of_llmodule(LLVMModuleRef M) {
  char* ModuleCStr;
  ModuleCStr = LLVMPrintModuleToString(M);

  value ModuleStr = caml_copy_string(ModuleCStr);
  LLVMDisposeMessage(ModuleCStr);

  return ModuleStr;
}

/* llmodule -> string -> unit */
CAMLprim value llvm_set_module_inline_asm(LLVMModuleRef M, value Asm) {
  LLVMSetModuleInlineAsm(M, String_val(Asm));
  return Val_unit;
}

/*===-- Types -------------------------------------------------------------===*/

/* lltype -> TypeKind.t */
CAMLprim value llvm_classify_type(LLVMTypeRef Ty) {
  return Val_int(LLVMGetTypeKind(Ty));
}

CAMLprim value llvm_type_is_sized(LLVMTypeRef Ty) {
    return Val_bool(LLVMTypeIsSized(Ty));
}

/* lltype -> llcontext */
CAMLprim LLVMContextRef llvm_type_context(LLVMTypeRef Ty) {
  return LLVMGetTypeContext(Ty);
}

/* lltype -> unit */
CAMLprim value llvm_dump_type(LLVMTypeRef Val) {
  LLVMDumpType(Val);
  return Val_unit;
}

/* lltype -> string */
CAMLprim value llvm_string_of_lltype(LLVMTypeRef M) {
  char* TypeCStr;
  TypeCStr = LLVMPrintTypeToString(M);

  value TypeStr = caml_copy_string(TypeCStr);
  LLVMDisposeMessage(TypeCStr);

  return TypeStr;
}

/*--... Operations on integer types ........................................--*/

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_i1_type (LLVMContextRef Context) {
  return LLVMInt1TypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_i8_type (LLVMContextRef Context) {
  return LLVMInt8TypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_i16_type (LLVMContextRef Context) {
  return LLVMInt16TypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_i32_type (LLVMContextRef Context) {
  return LLVMInt32TypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_i64_type (LLVMContextRef Context) {
  return LLVMInt64TypeInContext(Context);
}

/* llcontext -> int -> lltype */
CAMLprim LLVMTypeRef llvm_integer_type(LLVMContextRef Context, value Width) {
  return LLVMIntTypeInContext(Context, Int_val(Width));
}

/* lltype -> int */
CAMLprim value llvm_integer_bitwidth(LLVMTypeRef IntegerTy) {
  return Val_int(LLVMGetIntTypeWidth(IntegerTy));
}

/*--... Operations on real types ...........................................--*/

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_float_type(LLVMContextRef Context) {
  return LLVMFloatTypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_double_type(LLVMContextRef Context) {
  return LLVMDoubleTypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_x86fp80_type(LLVMContextRef Context) {
  return LLVMX86FP80TypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_fp128_type(LLVMContextRef Context) {
  return LLVMFP128TypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_ppc_fp128_type(LLVMContextRef Context) {
  return LLVMPPCFP128TypeInContext(Context);
}

/*--... Operations on function types .......................................--*/

/* lltype -> lltype array -> lltype */
CAMLprim LLVMTypeRef llvm_function_type(LLVMTypeRef RetTy, value ParamTys) {
  return LLVMFunctionType(RetTy, (LLVMTypeRef *) ParamTys,
                          Wosize_val(ParamTys), 0);
}

/* lltype -> lltype array -> lltype */
CAMLprim LLVMTypeRef llvm_var_arg_function_type(LLVMTypeRef RetTy,
                                                value ParamTys) {
  return LLVMFunctionType(RetTy, (LLVMTypeRef *) ParamTys,
                          Wosize_val(ParamTys), 1);
}

/* lltype -> bool */
CAMLprim value llvm_is_var_arg(LLVMTypeRef FunTy) {
  return Val_bool(LLVMIsFunctionVarArg(FunTy));
}

/* lltype -> lltype array */
CAMLprim value llvm_param_types(LLVMTypeRef FunTy) {
  value Tys = alloc(LLVMCountParamTypes(FunTy), 0);
  LLVMGetParamTypes(FunTy, (LLVMTypeRef *) Tys);
  return Tys;
}

/*--... Operations on struct types .........................................--*/

/* llcontext -> lltype array -> lltype */
CAMLprim LLVMTypeRef llvm_struct_type(LLVMContextRef C, value ElementTypes) {
  return LLVMStructTypeInContext(C, (LLVMTypeRef *) ElementTypes,
                                 Wosize_val(ElementTypes), 0);
}

/* llcontext -> lltype array -> lltype */
CAMLprim LLVMTypeRef llvm_packed_struct_type(LLVMContextRef C,
                                             value ElementTypes) {
  return LLVMStructTypeInContext(C, (LLVMTypeRef *) ElementTypes,
                                 Wosize_val(ElementTypes), 1);
}

/* llcontext -> string -> lltype */
CAMLprim LLVMTypeRef llvm_named_struct_type(LLVMContextRef C,
                                            value Name) {
  return LLVMStructCreateNamed(C, String_val(Name));
}

CAMLprim value llvm_struct_set_body(LLVMTypeRef Ty,
                                    value ElementTypes,
                                    value Packed) {
  LLVMStructSetBody(Ty, (LLVMTypeRef *) ElementTypes,
                    Wosize_val(ElementTypes), Bool_val(Packed));
  return Val_unit;
}

/* lltype -> string option */
CAMLprim value llvm_struct_name(LLVMTypeRef Ty)
{
  CAMLparam0();
  const char *C = LLVMGetStructName(Ty);
  if (C) {
    CAMLlocal1(result);
    result = caml_alloc_small(1, 0);
    Store_field(result, 0, caml_copy_string(C));
    CAMLreturn(result);
  }
  CAMLreturn(Val_int(0));
}

/* lltype -> lltype array */
CAMLprim value llvm_struct_element_types(LLVMTypeRef StructTy) {
  value Tys = alloc(LLVMCountStructElementTypes(StructTy), 0);
  LLVMGetStructElementTypes(StructTy, (LLVMTypeRef *) Tys);
  return Tys;
}

/* lltype -> bool */
CAMLprim value llvm_is_packed(LLVMTypeRef StructTy) {
  return Val_bool(LLVMIsPackedStruct(StructTy));
}

/* lltype -> bool */
CAMLprim value llvm_is_opaque(LLVMTypeRef StructTy) {
  return Val_bool(LLVMIsOpaqueStruct(StructTy));
}

/*--... Operations on array, pointer, and vector types .....................--*/

/* lltype -> int -> lltype */
CAMLprim LLVMTypeRef llvm_array_type(LLVMTypeRef ElementTy, value Count) {
  return LLVMArrayType(ElementTy, Int_val(Count));
}

/* lltype -> lltype */
CAMLprim LLVMTypeRef llvm_pointer_type(LLVMTypeRef ElementTy) {
  return LLVMPointerType(ElementTy, 0);
}

/* lltype -> int -> lltype */
CAMLprim LLVMTypeRef llvm_qualified_pointer_type(LLVMTypeRef ElementTy,
                                                 value AddressSpace) {
  return LLVMPointerType(ElementTy, Int_val(AddressSpace));
}

/* lltype -> int -> lltype */
CAMLprim LLVMTypeRef llvm_vector_type(LLVMTypeRef ElementTy, value Count) {
  return LLVMVectorType(ElementTy, Int_val(Count));
}

/* lltype -> int */
CAMLprim value llvm_array_length(LLVMTypeRef ArrayTy) {
  return Val_int(LLVMGetArrayLength(ArrayTy));
}

/* lltype -> int */
CAMLprim value llvm_address_space(LLVMTypeRef PtrTy) {
  return Val_int(LLVMGetPointerAddressSpace(PtrTy));
}

/* lltype -> int */
CAMLprim value llvm_vector_size(LLVMTypeRef VectorTy) {
  return Val_int(LLVMGetVectorSize(VectorTy));
}

/*--... Operations on other types ..........................................--*/

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_void_type (LLVMContextRef Context) {
  return LLVMVoidTypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_label_type(LLVMContextRef Context) {
  return LLVMLabelTypeInContext(Context);
}

/* llcontext -> lltype */
CAMLprim LLVMTypeRef llvm_x86_mmx_type(LLVMContextRef Context) {
  return LLVMX86MMXTypeInContext(Context);
}

CAMLprim value llvm_type_by_name(LLVMModuleRef M, value Name)
{
  CAMLparam1(Name);
  LLVMTypeRef Ty = LLVMGetTypeByName(M, String_val(Name));
  if (Ty) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) Ty;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/*===-- VALUES ------------------------------------------------------------===*/

/* llvalue -> lltype */
CAMLprim LLVMTypeRef llvm_type_of(LLVMValueRef Val) {
  return LLVMTypeOf(Val);
}

/* keep in sync with ValueKind.t */
enum ValueKind {
  NullValue=0,
  Argument,
  BasicBlock,
  InlineAsm,
  MDNode,
  MDString,
  BlockAddress,
  ConstantAggregateZero,
  ConstantArray,
  ConstantDataArray,
  ConstantDataVector,
  ConstantExpr,
  ConstantFP,
  ConstantInt,
  ConstantPointerNull,
  ConstantStruct,
  ConstantVector,
  Function,
  GlobalAlias,
  GlobalVariable,
  UndefValue,
  Instruction
};

/* llvalue -> ValueKind.t */
#define DEFINE_CASE(Val, Kind) \
    do {if (LLVMIsA##Kind(Val)) CAMLreturn(Val_int(Kind));} while(0)

CAMLprim value llvm_classify_value(LLVMValueRef Val) {
  CAMLparam0();
  if (!Val)
    CAMLreturn(Val_int(NullValue));
  if (LLVMIsAConstant(Val)) {
    DEFINE_CASE(Val, BlockAddress);
    DEFINE_CASE(Val, ConstantAggregateZero);
    DEFINE_CASE(Val, ConstantArray);
    DEFINE_CASE(Val, ConstantDataArray);
    DEFINE_CASE(Val, ConstantDataVector);
    DEFINE_CASE(Val, ConstantExpr);
    DEFINE_CASE(Val, ConstantFP);
    DEFINE_CASE(Val, ConstantInt);
    DEFINE_CASE(Val, ConstantPointerNull);
    DEFINE_CASE(Val, ConstantStruct);
    DEFINE_CASE(Val, ConstantVector);
  }
  if (LLVMIsAInstruction(Val)) {
    CAMLlocal1(result);
    result = caml_alloc_small(1, 0);
    Store_field(result, 0, Val_int(LLVMGetInstructionOpcode(Val)));
    CAMLreturn(result);
  }
  if (LLVMIsAGlobalValue(Val)) {
    DEFINE_CASE(Val, Function);
    DEFINE_CASE(Val, GlobalAlias);
    DEFINE_CASE(Val, GlobalVariable);
  }
  DEFINE_CASE(Val, Argument);
  DEFINE_CASE(Val, BasicBlock);
  DEFINE_CASE(Val, InlineAsm);
  DEFINE_CASE(Val, MDNode);
  DEFINE_CASE(Val, MDString);
  DEFINE_CASE(Val, UndefValue);
  failwith("Unknown Value class");
}

/* llvalue -> string */
CAMLprim value llvm_value_name(LLVMValueRef Val) {
  return copy_string(LLVMGetValueName(Val));
}

/* string -> llvalue -> unit */
CAMLprim value llvm_set_value_name(value Name, LLVMValueRef Val) {
  LLVMSetValueName(Val, String_val(Name));
  return Val_unit;
}

/* llvalue -> unit */
CAMLprim value llvm_dump_value(LLVMValueRef Val) {
  LLVMDumpValue(Val);
  return Val_unit;
}

/* llvalue -> string */
CAMLprim value llvm_string_of_llvalue(LLVMValueRef M) {
  char* ValueCStr;
  ValueCStr = LLVMPrintValueToString(M);

  value ValueStr = caml_copy_string(ValueCStr);
  LLVMDisposeMessage(ValueCStr);

  return ValueStr;
}

/* llvalue -> llvalue -> unit */
CAMLprim value llvm_replace_all_uses_with(LLVMValueRef OldVal,
                                          LLVMValueRef NewVal) {
  LLVMReplaceAllUsesWith(OldVal, NewVal);
  return Val_unit;
}

/*--... Operations on users ................................................--*/

/* llvalue -> int -> llvalue */
CAMLprim LLVMValueRef llvm_operand(LLVMValueRef V, value I) {
  return LLVMGetOperand(V, Int_val(I));
}

/* llvalue -> int -> llvalue -> unit */
CAMLprim value llvm_set_operand(LLVMValueRef U, value I, LLVMValueRef V) {
  LLVMSetOperand(U, Int_val(I), V);
  return Val_unit;
}

/* llvalue -> int */
CAMLprim value llvm_num_operands(LLVMValueRef V) {
  return Val_int(LLVMGetNumOperands(V));
}

/*--... Operations on constants of (mostly) any type .......................--*/

/* llvalue -> bool */
CAMLprim value llvm_is_constant(LLVMValueRef Val) {
  return Val_bool(LLVMIsConstant(Val));
}

/* llvalue -> bool */
CAMLprim value llvm_is_null(LLVMValueRef Val) {
  return Val_bool(LLVMIsNull(Val));
}

/* llvalue -> bool */
CAMLprim value llvm_is_undef(LLVMValueRef Val) {
  return Val_bool(LLVMIsUndef(Val));
}

/* llvalue -> Opcode.t */
CAMLprim value llvm_constexpr_get_opcode(LLVMValueRef Val) {
  return LLVMIsAConstantExpr(Val) ?
      Val_int(LLVMGetConstOpcode(Val)) : Val_int(0);
}

/*--... Operations on instructions .........................................--*/

/* llvalue -> bool */
CAMLprim value llvm_has_metadata(LLVMValueRef Val) {
  return Val_bool(LLVMHasMetadata(Val));
}

/* llvalue -> int -> llvalue option */
CAMLprim value llvm_metadata(LLVMValueRef Val, value MDKindID) {
  CAMLparam1(MDKindID);
  LLVMValueRef MD;
  if ((MD = LLVMGetMetadata(Val, Int_val(MDKindID)))) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) MD;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* llvalue -> int -> llvalue -> unit */
CAMLprim value llvm_set_metadata(LLVMValueRef Val, value MDKindID,
                                 LLVMValueRef MD) {
  LLVMSetMetadata(Val, Int_val(MDKindID), MD);
  return Val_unit;
}

/* llvalue -> int -> unit */
CAMLprim value llvm_clear_metadata(LLVMValueRef Val, value MDKindID) {
  LLVMSetMetadata(Val, Int_val(MDKindID), NULL);
  return Val_unit;
}


/*--... Operations on metadata .............................................--*/

/* llcontext -> string -> llvalue */
CAMLprim LLVMValueRef llvm_mdstring(LLVMContextRef C, value S) {
  return LLVMMDStringInContext(C, String_val(S), caml_string_length(S));
}

/* llcontext -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_mdnode(LLVMContextRef C, value ElementVals) {
  return LLVMMDNodeInContext(C, (LLVMValueRef*) Op_val(ElementVals),
                             Wosize_val(ElementVals));
}

/* llvalue -> string option */
CAMLprim value llvm_get_mdstring(LLVMValueRef V) {
  CAMLparam0();
  const char *S;
  unsigned Len;

  if ((S = LLVMGetMDString(V, &Len))) {
    CAMLlocal2(Option, Str);

    Str = caml_alloc_string(Len);
    memcpy(String_val(Str), S, Len);
    Option = alloc(1,0);
    Store_field(Option, 0, Str);
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* llmodule -> string -> llvalue array */
CAMLprim value llvm_get_namedmd(LLVMModuleRef M, value Name)
{
  CAMLparam1(Name);
  CAMLlocal1(Nodes);
  Nodes = alloc(LLVMGetNamedMetadataNumOperands(M, String_val(Name)), 0);
  LLVMGetNamedMetadataOperands(M, String_val(Name), (LLVMValueRef *) Nodes);
  CAMLreturn(Nodes);
}

/* llmodule -> string -> llvalue -> unit */
CAMLprim value llvm_append_namedmd(LLVMModuleRef M, value Name, LLVMValueRef Val) {
  LLVMAddNamedMetadataOperand(M, String_val(Name), Val);
  return Val_unit;
}

/*--... Operations on scalar constants .....................................--*/

/* lltype -> int -> llvalue */
CAMLprim LLVMValueRef llvm_const_int(LLVMTypeRef IntTy, value N) {
  return LLVMConstInt(IntTy, (long long) Int_val(N), 1);
}

/* lltype -> Int64.t -> bool -> llvalue */
CAMLprim LLVMValueRef llvm_const_of_int64(LLVMTypeRef IntTy, value N,
                                          value SExt) {
  return LLVMConstInt(IntTy, Int64_val(N), Bool_val(SExt));
}

/* llvalue -> Int64.t */
CAMLprim value llvm_int64_of_const(LLVMValueRef Const)
{
  CAMLparam0();
  if (LLVMIsAConstantInt(Const) &&
      LLVMGetIntTypeWidth(LLVMTypeOf(Const)) <= 64) {
    value Option = alloc(1, 0);
    Field(Option, 0) = caml_copy_int64(LLVMConstIntGetSExtValue(Const));
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* lltype -> string -> int -> llvalue */
CAMLprim LLVMValueRef llvm_const_int_of_string(LLVMTypeRef IntTy, value S,
                                               value Radix) {
  return LLVMConstIntOfStringAndSize(IntTy, String_val(S), caml_string_length(S),
                                     Int_val(Radix));
}

/* lltype -> float -> llvalue */
CAMLprim LLVMValueRef llvm_const_float(LLVMTypeRef RealTy, value N) {
  return LLVMConstReal(RealTy, Double_val(N));
}

/* lltype -> string -> llvalue */
CAMLprim LLVMValueRef llvm_const_float_of_string(LLVMTypeRef RealTy, value S) {
  return LLVMConstRealOfStringAndSize(RealTy, String_val(S),
                                      caml_string_length(S));
}

/*--... Operations on composite constants ..................................--*/

/* llcontext -> string -> llvalue */
CAMLprim LLVMValueRef llvm_const_string(LLVMContextRef Context, value Str,
                                        value NullTerminate) {
  return LLVMConstStringInContext(Context, String_val(Str), string_length(Str),
                                  1);
}

/* llcontext -> string -> llvalue */
CAMLprim LLVMValueRef llvm_const_stringz(LLVMContextRef Context, value Str,
                                         value NullTerminate) {
  return LLVMConstStringInContext(Context, String_val(Str), string_length(Str),
                                  0);
}

/* lltype -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_array(LLVMTypeRef ElementTy,
                                               value ElementVals) {
  return LLVMConstArray(ElementTy, (LLVMValueRef*) Op_val(ElementVals),
                        Wosize_val(ElementVals));
}

/* llcontext -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_struct(LLVMContextRef C, value ElementVals) {
  return LLVMConstStructInContext(C, (LLVMValueRef *) Op_val(ElementVals),
                                  Wosize_val(ElementVals), 0);
}

/* lltype -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_named_struct(LLVMTypeRef Ty, value ElementVals) {
    return LLVMConstNamedStruct(Ty, (LLVMValueRef *) Op_val(ElementVals),  Wosize_val(ElementVals));
}

/* llcontext -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_packed_struct(LLVMContextRef C,
                                               value ElementVals) {
  return LLVMConstStructInContext(C, (LLVMValueRef *) Op_val(ElementVals),
                                  Wosize_val(ElementVals), 1);
}

/* llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_vector(value ElementVals) {
  return LLVMConstVector((LLVMValueRef*) Op_val(ElementVals),
                         Wosize_val(ElementVals));
}

/*--... Constant expressions ...............................................--*/

/* Icmp.t -> llvalue -> llvalue -> llvalue */
CAMLprim LLVMValueRef llvm_const_icmp(value Pred,
                                      LLVMValueRef LHSConstant,
                                      LLVMValueRef RHSConstant) {
  return LLVMConstICmp(Int_val(Pred) + LLVMIntEQ, LHSConstant, RHSConstant);
}

/* Fcmp.t -> llvalue -> llvalue -> llvalue */
CAMLprim LLVMValueRef llvm_const_fcmp(value Pred,
                                      LLVMValueRef LHSConstant,
                                      LLVMValueRef RHSConstant) {
  return LLVMConstFCmp(Int_val(Pred), LHSConstant, RHSConstant);
}

/* llvalue -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_gep(LLVMValueRef ConstantVal, value Indices) {
  return LLVMConstGEP(ConstantVal, (LLVMValueRef*) Op_val(Indices),
                      Wosize_val(Indices));
}

/* llvalue -> llvalue array -> llvalue */
CAMLprim LLVMValueRef llvm_const_in_bounds_gep(LLVMValueRef ConstantVal,
                                               value Indices) {
  return LLVMConstInBoundsGEP(ConstantVal, (LLVMValueRef*) Op_val(Indices),
                              Wosize_val(Indices));
}

/* llvalue -> lltype -> is_signed:bool -> llvalue */
CAMLprim LLVMValueRef llvm_const_intcast(LLVMValueRef CV, LLVMTypeRef T,
                                         value IsSigned) {
  return LLVMConstIntCast(CV, T, Bool_val(IsSigned));
}

/* llvalue -> int array -> llvalue */
CAMLprim LLVMValueRef llvm_const_extractvalue(LLVMValueRef Aggregate,
                                              value Indices) {
  CAMLparam1(Indices);
  int size = Wosize_val(Indices);
  int i;
  LLVMValueRef result;

  unsigned* idxs = (unsigned*)malloc(size * sizeof(unsigned));
  for (i = 0; i < size; i++) {
    idxs[i] = Int_val(Field(Indices, i));
  }

  result = LLVMConstExtractValue(Aggregate, idxs, size);
  free(idxs);
  CAMLreturnT(LLVMValueRef, result);
}

/* llvalue -> llvalue -> int array -> llvalue */
CAMLprim LLVMValueRef llvm_const_insertvalue(LLVMValueRef Aggregate,
                                             LLVMValueRef Val, value Indices) {
  CAMLparam1(Indices);
  int size = Wosize_val(Indices);
  int i;
  LLVMValueRef result;

  unsigned* idxs = (unsigned*)malloc(size * sizeof(unsigned));
  for (i = 0; i < size; i++) {
    idxs[i] = Int_val(Field(Indices, i));
  }

  result = LLVMConstInsertValue(Aggregate, Val, idxs, size);
  free(idxs);
  CAMLreturnT(LLVMValueRef, result);
}

/* lltype -> string -> string -> bool -> bool -> llvalue */
CAMLprim LLVMValueRef llvm_const_inline_asm(LLVMTypeRef Ty, value Asm,
                                     value Constraints, value HasSideEffects,
                                     value IsAlignStack) {
  return LLVMConstInlineAsm(Ty, String_val(Asm), String_val(Constraints),
                            Bool_val(HasSideEffects), Bool_val(IsAlignStack));
}

/*--... Operations on global variables, functions, and aliases (globals) ...--*/

/* llvalue -> bool */
CAMLprim value llvm_is_declaration(LLVMValueRef Global) {
  return Val_bool(LLVMIsDeclaration(Global));
}

/* llvalue -> Linkage.t */
CAMLprim value llvm_linkage(LLVMValueRef Global) {
  return Val_int(LLVMGetLinkage(Global));
}

/* Linkage.t -> llvalue -> unit */
CAMLprim value llvm_set_linkage(value Linkage, LLVMValueRef Global) {
  LLVMSetLinkage(Global, Int_val(Linkage));
  return Val_unit;
}

/* llvalue -> string */
CAMLprim value llvm_section(LLVMValueRef Global) {
  return copy_string(LLVMGetSection(Global));
}

/* string -> llvalue -> unit */
CAMLprim value llvm_set_section(value Section, LLVMValueRef Global) {
  LLVMSetSection(Global, String_val(Section));
  return Val_unit;
}

/* llvalue -> Visibility.t */
CAMLprim value llvm_visibility(LLVMValueRef Global) {
  return Val_int(LLVMGetVisibility(Global));
}

/* Visibility.t -> llvalue -> unit */
CAMLprim value llvm_set_visibility(value Viz, LLVMValueRef Global) {
  LLVMSetVisibility(Global, Int_val(Viz));
  return Val_unit;
}

/* llvalue -> int */
CAMLprim value llvm_alignment(LLVMValueRef Global) {
  return Val_int(LLVMGetAlignment(Global));
}

/* int -> llvalue -> unit */
CAMLprim value llvm_set_alignment(value Bytes, LLVMValueRef Global) {
  LLVMSetAlignment(Global, Int_val(Bytes));
  return Val_unit;
}

/*--... Operations on uses .................................................--*/

/* llvalue -> lluse option */
CAMLprim value llvm_use_begin(LLVMValueRef Val) {
  CAMLparam0();
  LLVMUseRef First;
  if ((First = LLVMGetFirstUse(Val))) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) First;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* lluse -> lluse option */
CAMLprim value llvm_use_succ(LLVMUseRef U) {
  CAMLparam0();
  LLVMUseRef Next;
  if ((Next = LLVMGetNextUse(U))) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) Next;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* lluse -> llvalue */
CAMLprim LLVMValueRef llvm_user(LLVMUseRef UR) {
  return LLVMGetUser(UR);
}

/* lluse -> llvalue */
CAMLprim LLVMValueRef llvm_used_value(LLVMUseRef UR) {
  return LLVMGetUsedValue(UR);
}

/*--... Operations on global variables .....................................--*/

DEFINE_ITERATORS(global, Global, LLVMModuleRef, LLVMValueRef,
                 LLVMGetGlobalParent)

/* lltype -> string -> llmodule -> llvalue */
CAMLprim LLVMValueRef llvm_declare_global(LLVMTypeRef Ty, value Name,
                                          LLVMModuleRef M) {
  LLVMValueRef GlobalVar;
  if ((GlobalVar = LLVMGetNamedGlobal(M, String_val(Name)))) {
    if (LLVMGetElementType(LLVMTypeOf(GlobalVar)) != Ty)
      return LLVMConstBitCast(GlobalVar, LLVMPointerType(Ty, 0));
    return GlobalVar;
  }
  return LLVMAddGlobal(M, Ty, String_val(Name));
}

/* lltype -> string -> int -> llmodule -> llvalue */
CAMLprim LLVMValueRef llvm_declare_qualified_global(LLVMTypeRef Ty, value Name,
                                                    value AddressSpace,
                                                    LLVMModuleRef M) {
  LLVMValueRef GlobalVar;
  if ((GlobalVar = LLVMGetNamedGlobal(M, String_val(Name)))) {
    if (LLVMGetElementType(LLVMTypeOf(GlobalVar)) != Ty)
      return LLVMConstBitCast(GlobalVar,
                              LLVMPointerType(Ty, Int_val(AddressSpace)));
    return GlobalVar;
  }
  return LLVMAddGlobalInAddressSpace(M, Ty, String_val(Name),
                                     Int_val(AddressSpace));
}

/* string -> llmodule -> llvalue option */
CAMLprim value llvm_lookup_global(value Name, LLVMModuleRef M) {
  CAMLparam1(Name);
  LLVMValueRef GlobalVar;
  if ((GlobalVar = LLVMGetNamedGlobal(M, String_val(Name)))) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) GlobalVar;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* string -> llvalue -> llmodule -> llvalue */
CAMLprim LLVMValueRef llvm_define_global(value Name, LLVMValueRef Initializer,
                                         LLVMModuleRef M) {
  LLVMValueRef GlobalVar = LLVMAddGlobal(M, LLVMTypeOf(Initializer),
                                         String_val(Name));
  LLVMSetInitializer(GlobalVar, Initializer);
  return GlobalVar;
}

/* string -> llvalue -> int -> llmodule -> llvalue */
CAMLprim LLVMValueRef llvm_define_qualified_global(value Name,
                                                   LLVMValueRef Initializer,
                                                   value AddressSpace,
                                                   LLVMModuleRef M) {
  LLVMValueRef GlobalVar = LLVMAddGlobalInAddressSpace(M,
                                                       LLVMTypeOf(Initializer),
                                                       String_val(Name),
                                                       Int_val(AddressSpace));
  LLVMSetInitializer(GlobalVar, Initializer);
  return GlobalVar;
}

/* llvalue -> unit */
CAMLprim value llvm_delete_global(LLVMValueRef GlobalVar) {
  LLVMDeleteGlobal(GlobalVar);
  return Val_unit;
}

/* llvalue -> llvalue -> unit */
CAMLprim value llvm_set_initializer(LLVMValueRef ConstantVal,
                                    LLVMValueRef GlobalVar) {
  LLVMSetInitializer(GlobalVar, ConstantVal);
  return Val_unit;
}

/* llvalue -> unit */
CAMLprim value llvm_remove_initializer(LLVMValueRef GlobalVar) {
  LLVMSetInitializer(GlobalVar, NULL);
  return Val_unit;
}

/* llvalue -> bool */
CAMLprim value llvm_is_thread_local(LLVMValueRef GlobalVar) {
  return Val_bool(LLVMIsThreadLocal(GlobalVar));
}

/* bool -> llvalue -> unit */
CAMLprim value llvm_set_thread_local(value IsThreadLocal,
                                     LLVMValueRef GlobalVar) {
  LLVMSetThreadLocal(GlobalVar, Bool_val(IsThreadLocal));
  return Val_unit;
}

/* llvalue -> ThreadLocalMode.t */
CAMLprim value llvm_thread_local_mode(LLVMValueRef GlobalVar) {
  return Val_int(LLVMGetThreadLocalMode(GlobalVar));
}

/* ThreadLocalMode.t -> llvalue -> unit */
CAMLprim value llvm_set_thread_local_mode(value ThreadLocalMode,
                                          LLVMValueRef GlobalVar) {
  LLVMSetThreadLocalMode(GlobalVar, Int_val(ThreadLocalMode));
  return Val_unit;
}

/* llvalue -> bool */
CAMLprim value llvm_is_externally_initialized(LLVMValueRef GlobalVar) {
  return Val_bool(LLVMIsExternallyInitialized(GlobalVar));
}

/* bool -> llvalue -> unit */
CAMLprim value llvm_set_externally_initialized(value IsExternallyInitialized,
                                               LLVMValueRef GlobalVar) {
  LLVMSetExternallyInitialized(GlobalVar, Bool_val(IsExternallyInitialized));
  return Val_unit;
}

/* llvalue -> bool */
CAMLprim value llvm_is_global_constant(LLVMValueRef GlobalVar) {
  return Val_bool(LLVMIsGlobalConstant(GlobalVar));
}

/* bool -> llvalue -> unit */
CAMLprim value llvm_set_global_constant(value Flag, LLVMValueRef GlobalVar) {
  LLVMSetGlobalConstant(GlobalVar, Bool_val(Flag));
  return Val_unit;
}

/*--... Operations on aliases ..............................................--*/

CAMLprim LLVMValueRef llvm_add_alias(LLVMModuleRef M, LLVMTypeRef Ty,
                                     LLVMValueRef Aliasee, value Name) {
  return LLVMAddAlias(M, Ty, Aliasee, String_val(Name));
}

/*--... Operations on functions ............................................--*/

DEFINE_ITERATORS(function, Function, LLVMModuleRef, LLVMValueRef,
                 LLVMGetGlobalParent)

/* string -> lltype -> llmodule -> llvalue */
CAMLprim LLVMValueRef llvm_declare_function(value Name, LLVMTypeRef Ty,
                                            LLVMModuleRef M) {
  LLVMValueRef Fn;
  if ((Fn = LLVMGetNamedFunction(M, String_val(Name)))) {
    if (LLVMGetElementType(LLVMTypeOf(Fn)) != Ty)
      return LLVMConstBitCast(Fn, LLVMPointerType(Ty, 0));
    return Fn;
  }
  return LLVMAddFunction(M, String_val(Name), Ty);
}

/* string -> llmodule -> llvalue option */
CAMLprim value llvm_lookup_function(value Name, LLVMModuleRef M) {
  CAMLparam1(Name);
  LLVMValueRef Fn;
  if ((Fn = LLVMGetNamedFunction(M, String_val(Name)))) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) Fn;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* string -> lltype -> llmodule -> llvalue */
CAMLprim LLVMValueRef llvm_define_function(value Name, LLVMTypeRef Ty,
                                           LLVMModuleRef M) {
  LLVMValueRef Fn = LLVMAddFunction(M, String_val(Name), Ty);
  LLVMAppendBasicBlockInContext(LLVMGetTypeContext(Ty), Fn, "entry");
  return Fn;
}

/* llvalue -> unit */
CAMLprim value llvm_delete_function(LLVMValueRef Fn) {
  LLVMDeleteFunction(Fn);
  return Val_unit;
}

/* llvalue -> bool */
CAMLprim value llvm_is_intrinsic(LLVMValueRef Fn) {
  return Val_bool(LLVMGetIntrinsicID(Fn));
}

/* llvalue -> int */
CAMLprim value llvm_function_call_conv(LLVMValueRef Fn) {
  return Val_int(LLVMGetFunctionCallConv(Fn));
}

/* int -> llvalue -> unit */
CAMLprim value llvm_set_function_call_conv(value Id, LLVMValueRef Fn) {
  LLVMSetFunctionCallConv(Fn, Int_val(Id));
  return Val_unit;
}

/* llvalue -> string option */
CAMLprim value llvm_gc(LLVMValueRef Fn) {
  const char *GC;
  CAMLparam0();
  CAMLlocal2(Name, Option);
  
  if ((GC = LLVMGetGC(Fn))) {
    Name = copy_string(GC);
    
    Option = alloc(1, 0);
    Field(Option, 0) = Name;
    CAMLreturn(Option);
  } else {
    CAMLreturn(Val_int(0));
  }
}

/* string option -> llvalue -> unit */
CAMLprim value llvm_set_gc(value GC, LLVMValueRef Fn) {
  LLVMSetGC(Fn, GC == Val_int(0)? 0 : String_val(Field(GC, 0)));
  return Val_unit;
}

/* llvalue -> int32 -> unit */
CAMLprim value llvm_add_function_attr(LLVMValueRef Arg, value PA) {
  LLVMAddFunctionAttr(Arg, Int32_val(PA));
  return Val_unit;
}

/* llvalue -> string -> string -> unit */
CAMLprim value llvm_add_target_dependent_function_attr(
                  LLVMValueRef Arg, value A, value V) {
  LLVMAddTargetDependentFunctionAttr(Arg, String_val(A), String_val(V));
  return Val_unit;
}

/* llvalue -> int32 */
CAMLprim value llvm_function_attr(LLVMValueRef Fn)
{
    CAMLparam0();
    CAMLreturn(caml_copy_int32(LLVMGetFunctionAttr(Fn)));
}

/* llvalue -> int32 -> unit */
CAMLprim value llvm_remove_function_attr(LLVMValueRef Arg, value PA) {
  LLVMRemoveFunctionAttr(Arg, Int32_val(PA));
  return Val_unit;
}
/*--... Operations on parameters ...........................................--*/

DEFINE_ITERATORS(param, Param, LLVMValueRef, LLVMValueRef, LLVMGetParamParent)

/* llvalue -> int -> llvalue */
CAMLprim LLVMValueRef llvm_param(LLVMValueRef Fn, value Index) {
  return LLVMGetParam(Fn, Int_val(Index));
}

/* llvalue -> int */
CAMLprim value llvm_param_attr(LLVMValueRef Param)
{
    CAMLparam0();
    CAMLreturn(caml_copy_int32(LLVMGetAttribute(Param)));
}

/* llvalue -> llvalue */
CAMLprim value llvm_params(LLVMValueRef Fn) {
  value Params = alloc(LLVMCountParams(Fn), 0);
  LLVMGetParams(Fn, (LLVMValueRef *) Op_val(Params));
  return Params;
}

/* llvalue -> int32 -> unit */
CAMLprim value llvm_add_param_attr(LLVMValueRef Arg, value PA) {
  LLVMAddAttribute(Arg, Int32_val(PA));
  return Val_unit;
}

/* llvalue -> int32 -> unit */
CAMLprim value llvm_remove_param_attr(LLVMValueRef Arg, value PA) {
  LLVMRemoveAttribute(Arg, Int32_val(PA));
  return Val_unit;
}

/* llvalue -> int -> unit */
CAMLprim value llvm_set_param_alignment(LLVMValueRef Arg, value align) {
  LLVMSetParamAlignment(Arg, Int_val(align));
  return Val_unit;
}

/*--... Operations on basic blocks .........................................--*/

DEFINE_ITERATORS(
  block, BasicBlock, LLVMValueRef, LLVMBasicBlockRef, LLVMGetBasicBlockParent)

/* llbasicblock -> llvalue option */
CAMLprim value llvm_block_terminator(LLVMBasicBlockRef Block)
{
  CAMLparam0();
  LLVMValueRef Term = LLVMGetBasicBlockTerminator(Block);
  if (Term) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) Term;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* llvalue -> llbasicblock array */
CAMLprim value llvm_basic_blocks(LLVMValueRef Fn) {
  value MLArray = alloc(LLVMCountBasicBlocks(Fn), 0);
  LLVMGetBasicBlocks(Fn, (LLVMBasicBlockRef *) Op_val(MLArray));
  return MLArray;
}

/* llbasicblock -> unit */
CAMLprim value llvm_delete_block(LLVMBasicBlockRef BB) {
  LLVMDeleteBasicBlock(BB);
  return Val_unit;
}

/* llbasicblock -> unit */
CAMLprim value llvm_remove_block(LLVMBasicBlockRef BB) {
  LLVMRemoveBasicBlockFromParent(BB);
  return Val_unit;
}

/* llbasicblock -> llbasicblock -> unit */
CAMLprim value llvm_move_block_before(LLVMBasicBlockRef Pos, LLVMBasicBlockRef BB) {
  LLVMMoveBasicBlockBefore(BB, Pos);
  return Val_unit;
}

/* llbasicblock -> llbasicblock -> unit */
CAMLprim value llvm_move_block_after(LLVMBasicBlockRef Pos, LLVMBasicBlockRef BB) {
  LLVMMoveBasicBlockAfter(BB, Pos);
  return Val_unit;
}

/* string -> llvalue -> llbasicblock */
CAMLprim LLVMBasicBlockRef llvm_append_block(LLVMContextRef Context, value Name,
                                             LLVMValueRef Fn) {
  return LLVMAppendBasicBlockInContext(Context, Fn, String_val(Name));
}

/* string -> llbasicblock -> llbasicblock */
CAMLprim LLVMBasicBlockRef llvm_insert_block(LLVMContextRef Context, value Name,
                                             LLVMBasicBlockRef BB) {
  return LLVMInsertBasicBlockInContext(Context, BB, String_val(Name));
}

/* llvalue -> bool */
CAMLprim value llvm_value_is_block(LLVMValueRef Val) {
  return Val_bool(LLVMValueIsBasicBlock(Val));
}

/*--... Operations on instructions .........................................--*/

DEFINE_ITERATORS(instr, Instruction, LLVMBasicBlockRef, LLVMValueRef,
                 LLVMGetInstructionParent)

/* llvalue -> Opcode.t */
CAMLprim value llvm_instr_get_opcode(LLVMValueRef Inst) {
  LLVMOpcode o;
  if (!LLVMIsAInstruction(Inst))
      failwith("Not an instruction");
  o = LLVMGetInstructionOpcode(Inst);
  assert (o <= LLVMLandingPad);
  return Val_int(o);
}

/* llvalue -> ICmp.t option */
CAMLprim value llvm_instr_icmp_predicate(LLVMValueRef Val) {
  CAMLparam0();
  int x = LLVMGetICmpPredicate(Val);
  if (x) {
    value Option = alloc(1, 0);
    Field(Option, 0) = Val_int(x - LLVMIntEQ);
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}


/*--... Operations on call sites ...........................................--*/

/* llvalue -> int */
CAMLprim value llvm_instruction_call_conv(LLVMValueRef Inst) {
  return Val_int(LLVMGetInstructionCallConv(Inst));
}

/* int -> llvalue -> unit */
CAMLprim value llvm_set_instruction_call_conv(value CC, LLVMValueRef Inst) {
  LLVMSetInstructionCallConv(Inst, Int_val(CC));
  return Val_unit;
}

/* llvalue -> int -> int32 -> unit */
CAMLprim value llvm_add_instruction_param_attr(LLVMValueRef Instr,
                                               value index,
                                               value PA) {
  LLVMAddInstrAttribute(Instr, Int_val(index), Int32_val(PA));
  return Val_unit;
}

/* llvalue -> int -> int32 -> unit */
CAMLprim value llvm_remove_instruction_param_attr(LLVMValueRef Instr,
                                                  value index,
                                                  value PA) {
  LLVMRemoveInstrAttribute(Instr, Int_val(index), Int32_val(PA));
  return Val_unit;
}

/*--... Operations on call instructions (only) .............................--*/

/* llvalue -> bool */
CAMLprim value llvm_is_tail_call(LLVMValueRef CallInst) {
  return Val_bool(LLVMIsTailCall(CallInst));
}

/* bool -> llvalue -> unit */
CAMLprim value llvm_set_tail_call(value IsTailCall,
                                  LLVMValueRef CallInst) {
  LLVMSetTailCall(CallInst, Bool_val(IsTailCall));
  return Val_unit;
}

/*--... Operations on load/store instructions (only)........................--*/

/* llvalue -> bool */
CAMLprim value llvm_is_volatile(LLVMValueRef MemoryInst) {
  return Val_bool(LLVMGetVolatile(MemoryInst));
}

/* bool -> llvalue -> unit */
CAMLprim value llvm_set_volatile(value IsVolatile,
                                  LLVMValueRef MemoryInst) {
  LLVMSetVolatile(MemoryInst, Bool_val(IsVolatile));
  return Val_unit;
}

/*--... Operations on phi nodes ............................................--*/

/* (llvalue * llbasicblock) -> llvalue -> unit */
CAMLprim value llvm_add_incoming(value Incoming, LLVMValueRef PhiNode) {
  LLVMAddIncoming(PhiNode,
                  (LLVMValueRef*) &Field(Incoming, 0),
                  (LLVMBasicBlockRef*) &Field(Incoming, 1),
                  1);
  return Val_unit;
}

/* llvalue -> (llvalue * llbasicblock) list */
CAMLprim value llvm_incoming(LLVMValueRef PhiNode) {
  unsigned I;
  CAMLparam0();
  CAMLlocal3(Hd, Tl, Tmp);
  
  /* Build a tuple list of them. */
  Tl = Val_int(0);
  for (I = LLVMCountIncoming(PhiNode); I != 0; ) {
    Hd = alloc(2, 0);
    Store_field(Hd, 0, (value) LLVMGetIncomingValue(PhiNode, --I));
    Store_field(Hd, 1, (value) LLVMGetIncomingBlock(PhiNode, I));
    
    Tmp = alloc(2, 0);
    Store_field(Tmp, 0, Hd);
    Store_field(Tmp, 1, Tl);
    Tl = Tmp;
  }
  
  CAMLreturn(Tl);
}

/* llvalue -> unit */
CAMLprim value llvm_delete_instruction(LLVMValueRef Instruction) {
  LLVMInstructionEraseFromParent(Instruction);
  return Val_unit;
}

/*===-- Instruction builders ----------------------------------------------===*/

#define Builder_val(v)  (*(LLVMBuilderRef *)(Data_custom_val(v)))

static void llvm_finalize_builder(value B) {
  LLVMDisposeBuilder(Builder_val(B));
}

static struct custom_operations builder_ops = {
  (char *) "LLVMIRBuilder",
  llvm_finalize_builder,
  custom_compare_default,
  custom_hash_default,
  custom_serialize_default,
  custom_deserialize_default
#ifdef custom_compare_ext_default
  , custom_compare_ext_default
#endif
};

static value alloc_builder(LLVMBuilderRef B) {
  value V = alloc_custom(&builder_ops, sizeof(LLVMBuilderRef), 0, 1);
  Builder_val(V) = B;
  return V;
}

/* llcontext -> llbuilder */
CAMLprim value llvm_builder(LLVMContextRef C) {
  return alloc_builder(LLVMCreateBuilderInContext(C));
}

/* (llbasicblock, llvalue) llpos -> llbuilder -> unit */
CAMLprim value llvm_position_builder(value Pos, value B) {
  if (Tag_val(Pos) == 0) {
    LLVMBasicBlockRef BB = (LLVMBasicBlockRef) Op_val(Field(Pos, 0));
    LLVMPositionBuilderAtEnd(Builder_val(B), BB);
  } else {
    LLVMValueRef I = (LLVMValueRef) Op_val(Field(Pos, 0));
    LLVMPositionBuilderBefore(Builder_val(B), I);
  }
  return Val_unit;
}

/* llbuilder -> llbasicblock */
CAMLprim LLVMBasicBlockRef llvm_insertion_block(value B) {
  LLVMBasicBlockRef InsertBlock = LLVMGetInsertBlock(Builder_val(B));
  if (!InsertBlock)
    raise_not_found();
  return InsertBlock;
}

/* llvalue -> string -> llbuilder -> unit */
CAMLprim value llvm_insert_into_builder(LLVMValueRef I, value Name, value B) {
  LLVMInsertIntoBuilderWithName(Builder_val(B), I, String_val(Name));
  return Val_unit;
}

/*--... Metadata ...........................................................--*/

/* llbuilder -> llvalue -> unit */
CAMLprim value llvm_set_current_debug_location(value B, LLVMValueRef V) {
  LLVMSetCurrentDebugLocation(Builder_val(B), V);
  return Val_unit;
}

/* llbuilder -> unit */
CAMLprim value llvm_clear_current_debug_location(value B) {
  LLVMSetCurrentDebugLocation(Builder_val(B), NULL);
  return Val_unit;
}

/* llbuilder -> llvalue option */
CAMLprim value llvm_current_debug_location(value B) {
  CAMLparam0();
  LLVMValueRef L;
  if ((L = LLVMGetCurrentDebugLocation(Builder_val(B)))) {
    value Option = alloc(1, 0);
    Field(Option, 0) = (value) L;
    CAMLreturn(Option);
  }
  CAMLreturn(Val_int(0));
}

/* llbuilder -> llvalue -> unit */
CAMLprim value llvm_set_inst_debug_location(value B, LLVMValueRef V) {
  LLVMSetInstDebugLocation(Builder_val(B), V);
  return Val_unit;
}


/*--... Terminators ........................................................--*/

/* llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_ret_void(value B) {
  return LLVMBuildRetVoid(Builder_val(B));
}

/* llvalue -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_ret(LLVMValueRef Val, value B) {
  return LLVMBuildRet(Builder_val(B), Val);
}

/* llvalue array -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_aggregate_ret(value RetVals, value B) {
  return LLVMBuildAggregateRet(Builder_val(B), (LLVMValueRef *) Op_val(RetVals),
                               Wosize_val(RetVals));
}

/* llbasicblock -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_br(LLVMBasicBlockRef BB, value B) {
  return LLVMBuildBr(Builder_val(B), BB);
}

/* llvalue -> llbasicblock -> llbasicblock -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_cond_br(LLVMValueRef If,
                                         LLVMBasicBlockRef Then,
                                         LLVMBasicBlockRef Else,
                                         value B) {
  return LLVMBuildCondBr(Builder_val(B), If, Then, Else);
}

/* llvalue -> llbasicblock -> int -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_switch(LLVMValueRef Of,
                                        LLVMBasicBlockRef Else,
                                        value EstimatedCount,
                                        value B) {
  return LLVMBuildSwitch(Builder_val(B), Of, Else, Int_val(EstimatedCount));
}

/* lltype -> string -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_malloc(LLVMTypeRef Ty, value Name,
                                        value B)
{
  return LLVMBuildMalloc(Builder_val(B), Ty, String_val(Name));
}

/* lltype -> llvalue -> string -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_array_malloc(LLVMTypeRef Ty,
                                              LLVMValueRef Val,
                                              value Name, value B)
{
  return LLVMBuildArrayMalloc(Builder_val(B), Ty, Val, String_val(Name));
}

/* llvalue -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_free(LLVMValueRef P, value B)
{
  return LLVMBuildFree(Builder_val(B), P);
}

/* llvalue -> llvalue -> llbasicblock -> unit */
CAMLprim value llvm_add_case(LLVMValueRef Switch, LLVMValueRef OnVal,
                             LLVMBasicBlockRef Dest) {
  LLVMAddCase(Switch, OnVal, Dest);
  return Val_unit;
}

/* llvalue -> llbasicblock -> llbuilder -> llvalue */
CAMLprim LLVMValueRef llvm_build_indirect_br(LLVMValueRef Addr,
                                             value…