C and Ocaml bindings for ExecutionEngine (i.e., the JIT compiler).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45335 91177308-0d34-0410-b5e6-96231b3b80d8

12 files changed, 1031 insertions, 12 deletions

diff --git a/Xcode/LLVM.xcodeproj/project.pbxproj b/Xcode/LLVM.xcodeproj/project.pbxproj
index 8c7762e..416ba59 100644
--- a/Xcode/LLVM.xcodeproj/project.pbxproj
+++ b/Xcode/LLVM.xcodeproj/project.pbxproj
@@ -85,6 +85,11 @@
 		9F4B0E600D0E02580061F270 /* llvm_bitreader.mli */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = llvm_bitreader.mli; sourceTree = "<group>"; };
 		9F4B0E8C0D0E05ED0061F270 /* BitReader.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = BitReader.cpp; sourceTree = "<group>"; };
 		9F4B0E8D0D0E05ED0061F270 /* DeserializeAPFloat.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = DeserializeAPFloat.cpp; sourceTree = "<group>"; };
+		9F502ADB0D1D8CA3007939DF /* executionengine_ocaml.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = executionengine_ocaml.c; sourceTree = "<group>"; };
+		9F502ADC0D1D8CA3007939DF /* llvm_executionengine.ml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = llvm_executionengine.ml; sourceTree = "<group>"; };
+		9F502ADD0D1D8CA3007939DF /* llvm_executionengine.mli */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = llvm_executionengine.mli; sourceTree = "<group>"; };
+		9F502AEC0D1D8CF8007939DF /* executionengine.ml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = executionengine.ml; sourceTree = "<group>"; };
+		9F502B090D1D8D8D007939DF /* ExecutionEngineBindings.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ExecutionEngineBindings.cpp; sourceTree = "<group>"; };
 		9F5B90CB0D0CE87100CDFDEA /* StringPool.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StringPool.cpp; sourceTree = "<group>"; };
 		9F5B90CE0D0CE89300CDFDEA /* AlignOf.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AlignOf.h; sourceTree = "<group>"; };
 		9F5B90CF0D0CE89300CDFDEA /* Registry.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Registry.h; sourceTree = "<group>"; };
@@ -233,6 +238,7 @@
 		9FE450E00C77ABE400C4FEA4 /* ArchiveInternals.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = ArchiveInternals.h; sourceTree = "<group>"; };
 		9FE450E10C77ABE400C4FEA4 /* ArchiveReader.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; path = ArchiveReader.cpp; sourceTree = "<group>"; };
 		9FE450E20C77ABE400C4FEA4 /* ArchiveWriter.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; path = ArchiveWriter.cpp; sourceTree = "<group>"; };
+		9FEB8C550D1CD1E200EE46BC /* ExecutionEngine.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ExecutionEngine.h; sourceTree = "<group>"; };
 		CF1ACC9709C9DE4400D3C5EB /* IntrinsicInst.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = IntrinsicInst.cpp; path = ../lib/VMCore/IntrinsicInst.cpp; sourceTree = "<group>"; };
 		CF26835B09178F5500C5F253 /* TargetInstrItineraries.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TargetInstrItineraries.h; sourceTree = "<group>"; };
 		CF32AF5C0AEE6A4E00D24CD4 /* LLVMTargetMachine.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = LLVMTargetMachine.cpp; sourceTree = "<group>"; };
@@ -1121,6 +1127,16 @@
 			path = bitreader;
 			sourceTree = "<group>";
 		};
+		9F502ACD0D1D8CA3007939DF /* executionengine */ = {
+			isa = PBXGroup;
+			children = (
+				9F502ADB0D1D8CA3007939DF /* executionengine_ocaml.c */,
+				9F502ADC0D1D8CA3007939DF /* llvm_executionengine.ml */,
+				9F502ADD0D1D8CA3007939DF /* llvm_executionengine.mli */,
+			);
+			path = executionengine;
+			sourceTree = "<group>";
+		};
 		9F68EB030C77AD2C004AA152 /* lib/Bitcode */ = {
 			isa = PBXGroup;
 			children = (
@@ -1244,6 +1260,7 @@
 				9F7C2C4F0CB9496C00498408 /* analysis.ml */,
 				9F6B2CC00D0F6E56000F00FD /* bitreader.ml */,
 				9F7C2C520CB9496C00498408 /* bitwriter.ml */,
+				9F502AEC0D1D8CF8007939DF /* executionengine.ml */,
 				9F7C2C5D0CB9496C00498408 /* vmcore.ml */,
 			);
 			path = Ocaml;
@@ -1269,6 +1286,7 @@
 		9FD3E56F0CA0116100E54D15 /* ocaml */ = {
 			isa = PBXGroup;
 			children = (
+				9F502ACD0D1D8CA3007939DF /* executionengine */,
 				9F7C240B0CB81ECD00498408 /* analysis */,
 				9F4B0E5D0D0E02580061F270 /* bitreader */,
 				9FD3E5700CA0116100E54D15 /* bitwriter */,
@@ -1316,6 +1334,7 @@
 				9F5B90E70D0DF19100CDFDEA /* BitReader.h */,
 				9FD3E58D0CA0125F00E54D15 /* BitWriter.h */,
 				9FD3E58E0CA0125F00E54D15 /* Core.h */,
+				9FEB8C550D1CD1E200EE46BC /* ExecutionEngine.h */,
 				CF8F1B490B64F7AB00BB4199 /* LinkTimeOptimizer.h */,
 			);
 			name = "include/llvm-c";
@@ -1607,6 +1626,7 @@
 				DE66EDC508ABEC9000323D32 /* Interpreter */,
 				DE66EDD308ABEC9000323D32 /* JIT */,
 				DE66EDC408ABEC9000323D32 /* ExecutionEngine.cpp */,
+				9F502B090D1D8D8D007939DF /* ExecutionEngineBindings.cpp */,
 			);
 			name = lib/ExecutionEngine;
 			path = ../lib/ExecutionEngine;
diff --git a/bindings/ocaml/Makefile b/bindings/ocaml/Makefile
index 11abec4..89d05df 100644
--- a/bindings/ocaml/Makefile
+++ b/bindings/ocaml/Makefile
@@ -8,6 +8,6 @@
 ##===----------------------------------------------------------------------===##
 
 LEVEL := ../..
-DIRS = llvm bitreader bitwriter analysis
+DIRS = llvm bitreader bitwriter analysis executionengine
 
 include $(LEVEL)/Makefile.common
diff --git a/bindings/ocaml/Makefile.ocaml b/bindings/ocaml/Makefile.ocaml
index b7f4fde..6008c3a 100644
--- a/bindings/ocaml/Makefile.ocaml
+++ b/bindings/ocaml/Makefile.ocaml
@@ -41,13 +41,18 @@ OCAMLAFLAGS += $(patsubst %,-cclib %, \
                  $(filter-out -L$(LibDir),-l$(LIBRARYNAME) \
                                           $(shell $(LLVM_CONFIG) --ldflags)) \
                                           $(UsedLibs))
+ 
+ifneq ($(ENABLE_OPTIMIZED),1)
+  OCAMLDEBUGFLAG := -g
+endif
 
-Compile.CMI  := $(strip $(OCAMLC) -c $(OCAMLCFLAGS) -o)
-Compile.CMO  := $(strip $(OCAMLC) -c $(OCAMLCFLAGS) -o)
-Archive.CMA  := $(strip $(OCAMLC) -a -custom $(OCAMLAFLAGS) -o)
+Compile.CMI  := $(strip $(OCAMLC) -c $(OCAMLCFLAGS) $(OCAMLDEBUGFLAG) -o)
+Compile.CMO  := $(strip $(OCAMLC) -c $(OCAMLCFLAGS) $(OCAMLDEBUGFLAG) -o)
+Archive.CMA  := $(strip $(OCAMLC) -a -custom $(OCAMLAFLAGS) $(OCAMLDEBUGFLAG) \
+                                  -o)
 
-Compile.CMX  := $(strip $(OCAMLOPT) -c $(OCAMLCFLAGS) -o)
-Archive.CMXA := $(strip $(OCAMLOPT) -a $(OCAMLAFLAGS) -o)
+Compile.CMX  := $(strip $(OCAMLOPT) -c $(OCAMLCFLAGS) $(OCAMLDEBUGFLAG) -o)
+Archive.CMXA := $(strip $(OCAMLOPT) -a $(OCAMLAFLAGS) $(OCAMLDEBUGFLAG) -o)
 
 # Source files
 OcamlSources1 := $(sort $(wildcard $(PROJ_SRC_DIR)/*.ml))
@@ -137,6 +142,9 @@ build-deplibs: $(OutputLibs)
 $(OcamlDir)/%.a: $(LibDir)/%.a
 	$(Verb) ln -sf $< $@
 
+$(OcamlDir)/%.o: $(LibDir)/%.o
+	$(Verb) ln -sf $< $@
+
 clean-deplibs:
 	$(Verb) rm -f $(OutputLibs)
 
diff --git a/bindings/ocaml/bitreader/bitreader_ocaml.c b/bindings/ocaml/bitreader/bitreader_ocaml.c
index 87477f6..980ed2a 100644
--- a/bindings/ocaml/bitreader/bitreader_ocaml.c
+++ b/bindings/ocaml/bitreader/bitreader_ocaml.c
@@ -14,9 +14,8 @@
 
 #include "llvm-c/BitReader.h"
 #include "caml/alloc.h"
-#include "caml/mlvalues.h"
+#include "caml/fail.h"
 #include "caml/memory.h"
-#include <stdio.h>
 
 
 /* Can't use the recommended caml_named_value mechanism for backwards
@@ -29,7 +28,17 @@ CAMLprim value llvm_register_bitreader_exns(value Error) {
   return Val_unit;
 }
 
-void llvm_raise(value Prototype, char *Message);
+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 */
+  CAMLnoreturn;
+}
 
 
 /*===-- Modules -----------------------------------------------------------===*/
diff --git a/bindings/ocaml/executionengine/Makefile b/bindings/ocaml/executionengine/Makefile
new file mode 100644
index 0000000..2d95b12
--- /dev/null
+++ b/bindings/ocaml/executionengine/Makefile
@@ -0,0 +1,20 @@
+##===- bindings/ocaml/executionengine/Makefile --------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by Gordon Henriksen and is distributed under the
+# University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+# 
+# This is the makefile for the Objective Caml Llvm_executionengine interface.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../../..
+LIBRARYNAME := llvm_executionengine
+DONT_BUILD_RELINKED := 1
+UsedComponents := executionengine jit interpreter native
+UsedOcamlInterfaces := llvm
+
+include ../Makefile.ocaml
diff --git a/bindings/ocaml/executionengine/executionengine_ocaml.c b/bindings/ocaml/executionengine/executionengine_ocaml.c
new file mode 100644
index 0000000..816c966
--- /dev/null
+++ b/bindings/ocaml/executionengine/executionengine_ocaml.c
@@ -0,0 +1,301 @@
+/*===-- analysis_ocaml.c - LLVM Ocaml Glue ----------------------*- C++ -*-===*\
+|*                                                                            *|
+|*                     The LLVM Compiler Infrastructure                       *|
+|*                                                                            *|
+|* This file was developed by Gordon Henriksen and 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/ExecutionEngine.h"
+#include "caml/alloc.h"
+#include "caml/custom.h"
+#include "caml/fail.h"
+#include "caml/memory.h"
+#include <string.h>
+#include <assert.h>
+
+
+/* Can't use the recommended caml_named_value mechanism for backwards
+   compatibility reasons. This is largely equivalent. */
+static value llvm_ee_error_exn;
+
+CAMLprim value llvm_register_ee_exns(value Error) {
+  llvm_ee_error_exn = Field(Error, 0);
+  register_global_root(&llvm_ee_error_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 */
+  CAMLnoreturn;
+}
+
+
+/*--... Operations on generic values .......................................--*/
+
+#define Genericvalue_val(v)  (*(LLVMGenericValueRef *)(Data_custom_val(v)))
+
+static void llvm_finalize_generic_value(value GenVal) {
+  LLVMDisposeGenericValue(Genericvalue_val(GenVal));
+}
+
+static struct custom_operations generic_value_ops = {
+  (char *) "LLVMGenericValue",
+  llvm_finalize_generic_value,
+  custom_compare_default,
+  custom_hash_default,
+  custom_serialize_default,
+  custom_deserialize_default
+};
+
+static value alloc_generic_value(LLVMGenericValueRef Ref) {
+  value Val = alloc_custom(&generic_value_ops, sizeof(LLVMGenericValueRef), 0, 1);
+  Genericvalue_val(Val) = Ref;
+  return Val;
+}
+
+/* Llvm.lltype -> float -> t */
+CAMLprim value llvm_genericvalue_of_float(LLVMTypeRef Ty, value N) {
+  return alloc_generic_value(LLVMCreateGenericValueOfFloat(Ty, Double_val(N)));
+}
+
+/* 'a -> t */
+CAMLprim value llvm_genericvalue_of_value(value V) {
+  return alloc_generic_value(LLVMCreateGenericValueOfPointer(Op_val(V)));
+}
+
+/* Llvm.lltype -> int -> t */
+CAMLprim value llvm_genericvalue_of_int(LLVMTypeRef Ty, value Int) {
+  return alloc_generic_value(LLVMCreateGenericValueOfInt(Ty, Int_val(Int), 1));
+}
+
+/* Llvm.lltype -> int32 -> t */
+CAMLprim value llvm_genericvalue_of_int32(LLVMTypeRef Ty, value Int32) {
+  return alloc_generic_value(LLVMCreateGenericValueOfInt(Ty, Int32_val(Int32),
+                                                         1));
+}
+
+/* Llvm.lltype -> nativeint -> t */
+CAMLprim value llvm_genericvalue_of_nativeint(LLVMTypeRef Ty, value NatInt) {
+  return alloc_generic_value(LLVMCreateGenericValueOfInt(Ty,
+                                                         Nativeint_val(NatInt),
+                                                         1));
+}
+
+/* Llvm.lltype -> int64 -> t */
+CAMLprim value llvm_genericvalue_of_int64(LLVMTypeRef Ty, value Int64) {
+  return alloc_generic_value(LLVMCreateGenericValueOfInt(Ty, Int64_val(Int64),
+                                                         1));
+}
+
+/* Llvm.lltype -> t -> float */
+CAMLprim value llvm_genericvalue_as_float(LLVMTypeRef Ty, value GenVal) {
+  return copy_double(LLVMGenericValueToFloat(Ty, Genericvalue_val(GenVal)));
+}
+
+/* t -> 'a */
+CAMLprim value llvm_genericvalue_as_value(value GenVal) {
+  return Val_op(LLVMGenericValueToPointer(Genericvalue_val(GenVal)));
+}
+
+/* t -> int */
+CAMLprim value llvm_genericvalue_as_int(value GenVal) {
+  assert(LLVMGenericValueIntWidth(Genericvalue_val(GenVal)) <= 8 * sizeof(value)
+         && "Generic value too wide to treat as an int!");
+  return Val_int(LLVMGenericValueToInt(Genericvalue_val(GenVal), 1));
+}
+
+/* t -> int32 */
+CAMLprim value llvm_genericvalue_as_int32(value GenVal) {
+  assert(LLVMGenericValueIntWidth(Genericvalue_val(GenVal)) <= 32
+         && "Generic value too wide to treat as an int32!");
+  return copy_int32(LLVMGenericValueToInt(Genericvalue_val(GenVal), 1));
+}
+
+/* t -> int64 */
+CAMLprim value llvm_genericvalue_as_int64(value GenVal) {
+  assert(LLVMGenericValueIntWidth(Genericvalue_val(GenVal)) <= 64
+         && "Generic value too wide to treat as an int64!");
+  return copy_int64(LLVMGenericValueToInt(Genericvalue_val(GenVal), 1));
+}
+
+/* t -> nativeint */
+CAMLprim value llvm_genericvalue_as_nativeint(value GenVal) {
+  assert(LLVMGenericValueIntWidth(Genericvalue_val(GenVal)) <= 8 * sizeof(value)
+         && "Generic value too wide to treat as a nativeint!");
+  return copy_nativeint(LLVMGenericValueToInt(Genericvalue_val(GenVal),1));
+}
+
+
+/*--... Operations on execution engines ....................................--*/
+
+/* llmoduleprovider -> ExecutionEngine.t */
+CAMLprim LLVMExecutionEngineRef llvm_ee_create(LLVMModuleProviderRef MP) {
+  LLVMExecutionEngineRef Interp;
+  char *Error;
+  if (LLVMCreateExecutionEngine(&Interp, MP, &Error))
+    llvm_raise(llvm_ee_error_exn, Error);
+  return Interp;
+}
+
+/* llmoduleprovider -> ExecutionEngine.t */
+CAMLprim LLVMExecutionEngineRef
+llvm_ee_create_interpreter(LLVMModuleProviderRef MP) {
+  LLVMExecutionEngineRef Interp;
+  char *Error;
+  if (LLVMCreateInterpreter(&Interp, MP, &Error))
+    llvm_raise(llvm_ee_error_exn, Error);
+  return Interp;
+}
+
+/* llmoduleprovider -> ExecutionEngine.t */
+CAMLprim LLVMExecutionEngineRef
+llvm_ee_create_jit(LLVMModuleProviderRef MP) {
+  LLVMExecutionEngineRef JIT;
+  char *Error;
+  if (LLVMCreateJITCompiler(&JIT, MP, &Error))
+    llvm_raise(llvm_ee_error_exn, Error);
+  return JIT;
+}
+
+/* ExecutionEngine.t -> unit */
+CAMLprim value llvm_ee_dispose(LLVMExecutionEngineRef EE) {
+  LLVMDisposeExecutionEngine(EE);
+  return Val_unit;
+}
+
+/* llmoduleprovider -> ExecutionEngine.t -> unit */
+CAMLprim value llvm_ee_add_mp(LLVMModuleProviderRef MP,
+                              LLVMExecutionEngineRef EE) {
+  LLVMAddModuleProvider(EE, MP);
+  return Val_unit;
+}
+
+/* llmoduleprovider -> ExecutionEngine.t -> llmodule */
+CAMLprim LLVMModuleRef llvm_ee_remove_mp(LLVMModuleProviderRef MP,
+                                         LLVMExecutionEngineRef EE) {
+  LLVMModuleRef RemovedModule;
+  char *Error;
+  if (LLVMRemoveModuleProvider(EE, MP, &RemovedModule, &Error))
+    llvm_raise(llvm_ee_error_exn, Error);
+  return RemovedModule;
+}
+
+/* string -> ExecutionEngine.t -> llvalue option */
+CAMLprim value llvm_ee_find_function(value Name, LLVMExecutionEngineRef EE) {
+  CAMLparam1(Name);
+  CAMLlocal1(Option);
+  LLVMValueRef Found;
+  if (LLVMFindFunction(EE, String_val(Name), &Found))
+    CAMLreturn(Val_unit);
+  Option = alloc(1, 1);
+  Field(Option, 0) = Val_op(Found);
+  CAMLreturn(Option);
+}
+
+/* llvalue -> GenericValue.t array -> ExecutionEngine.t -> GenericValue.t */
+CAMLprim value llvm_ee_run_function(LLVMValueRef F, value Args,
+                                    LLVMExecutionEngineRef EE) {
+  unsigned NumArgs;
+  LLVMGenericValueRef Result, *GVArgs;
+  unsigned I;
+  
+  NumArgs = Wosize_val(Args);
+  GVArgs = (LLVMGenericValueRef*) malloc(NumArgs * sizeof(LLVMGenericValueRef));
+  for (I = 0; I != NumArgs; ++I)
+    GVArgs[I] = Genericvalue_val(Field(Args, I));
+  
+  Result = LLVMRunFunction(EE, F, NumArgs, GVArgs);
+  
+  free(GVArgs);
+  return alloc_generic_value(Result);
+}
+
+/* ExecutionEngine.t -> unit */
+CAMLprim value llvm_ee_run_static_ctors(LLVMExecutionEngineRef EE) {
+  LLVMRunStaticConstructors(EE);
+  return Val_unit;
+}
+
+/* ExecutionEngine.t -> unit */
+CAMLprim value llvm_ee_run_static_dtors(LLVMExecutionEngineRef EE) {
+  LLVMRunStaticDestructors(EE);
+  return Val_unit;
+}
+
+/* llvalue -> string array -> (string * string) array -> ExecutionEngine.t ->
+   int */
+CAMLprim value llvm_ee_run_function_as_main(LLVMValueRef F,
+                                            value Args, value Env,
+                                            LLVMExecutionEngineRef EE) {
+  CAMLparam2(Args, Env);
+  int I, NumArgs, NumEnv, EnvSize, Result;
+  const char **CArgs, **CEnv;
+  char *CEnvBuf, *Pos;
+  
+  NumArgs = Wosize_val(Args);
+  NumEnv = Wosize_val(Env);
+  
+  /* Build the environment. */
+  CArgs = (const char **) malloc(NumArgs * sizeof(char*));
+  for (I = 0; I != NumArgs; ++I)
+    CArgs[I] = String_val(Field(Args, I));
+  
+  /* Compute the size of the environment string buffer. */
+  for (I = 0, EnvSize = 0; I != NumEnv; ++I) {
+    EnvSize += strlen(String_val(Field(Field(Env, I), 0))) + 1;
+    EnvSize += strlen(String_val(Field(Field(Env, I), 1))) + 1;
+  }
+  
+  /* Build the environment. */
+  CEnv = (const char **) malloc((NumEnv + 1) * sizeof(char*));
+  CEnvBuf = (char*) malloc(EnvSize);
+  Pos = CEnvBuf;
+  for (I = 0; I != NumEnv; ++I) {
+    char *Name  = String_val(Field(Field(Env, I), 0)),
+         *Value = String_val(Field(Field(Env, I), 1));
+    int NameLen  = strlen(Name),
+        ValueLen = strlen(Value);
+    
+    CEnv[I] = Pos;
+    memcpy(Pos, Name, NameLen);
+    Pos += NameLen;
+    *Pos++ = '=';
+    memcpy(Pos, Value, ValueLen);
+    Pos += ValueLen;
+    *Pos++ = '\0';
+  }
+  CEnv[NumEnv] = NULL;
+  
+  Result = LLVMRunFunctionAsMain(EE, F, NumArgs, CArgs, CEnv);
+  
+  free(CArgs);
+  free(CEnv);
+  free(CEnvBuf);
+  
+  CAMLreturn(Val_int(Result));
+}
+
+/* llvalue -> ExecutionEngine.t -> unit */
+CAMLprim value llvm_ee_free_machine_code(LLVMValueRef F,
+                                         LLVMExecutionEngineRef EE) {
+  LLVMFreeMachineCodeForFunction(EE, F);
+  return Val_unit;
+}
+
diff --git a/bindings/ocaml/executionengine/llvm_executionengine.ml b/bindings/ocaml/executionengine/llvm_executionengine.ml
new file mode 100644
index 0000000..072e249
--- /dev/null
+++ b/bindings/ocaml/executionengine/llvm_executionengine.ml
@@ -0,0 +1,106 @@
+(*===-- llvm_executionengine.ml - LLVM Ocaml Interface ----------*- C++ -*-===*
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file was developed by Gordon Henriksen and is distributed under the
+ * University of Illinois Open Source License. See LICENSE.TXT for details.
+ *
+ *===----------------------------------------------------------------------===*)
+
+
+exception Error of string
+
+external register_exns: exn -> unit
+  = "llvm_register_ee_exns"
+
+
+module GenericValue = struct
+  type t
+  
+  external of_float: Llvm.lltype -> float -> t
+    = "llvm_genericvalue_of_float"
+  external of_pointer: 'a -> t
+    = "llvm_genericvalue_of_value"
+  external of_int32: Llvm.lltype -> int32 -> t
+    = "llvm_genericvalue_of_int32"
+  external of_int: Llvm.lltype -> int -> t
+    = "llvm_genericvalue_of_int"
+  external of_nativeint: Llvm.lltype -> nativeint -> t
+    = "llvm_genericvalue_of_nativeint"
+  external of_int64: Llvm.lltype -> int64 -> t
+    = "llvm_genericvalue_of_int64"
+  
+  external as_float: Llvm.lltype -> t -> float
+    = "llvm_genericvalue_as_float"
+  external as_pointer: t -> 'a
+    = "llvm_genericvalue_as_value"
+  external as_int32: t -> int32
+    = "llvm_genericvalue_as_int32"
+  external as_int: t -> int
+    = "llvm_genericvalue_as_int"
+  external as_nativeint: t -> nativeint
+    = "llvm_genericvalue_as_nativeint"
+  external as_int64: t -> int64
+    = "llvm_genericvalue_as_int64"
+end
+
+
+module ExecutionEngine = struct
+  type t
+  
+  (* FIXME: Ocaml is not running this setup code unless we use 'val' in the
+            interface, which causes the emission of a stub for each function;
+            using 'external' in the module allows direct calls into 
+            ocaml_executionengine.c. This is hardly fatal, but it is unnecessary
+            overhead on top of the two stubs that are already invoked for each 
+            call into LLVM. *)
+  let _ = register_exns (Error "")
+  
+  external create: Llvm.llmoduleprovider -> t
+    = "llvm_ee_create"
+  external create_interpreter: Llvm.llmoduleprovider -> t
+    = "llvm_ee_create_interpreter"
+  external create_jit: Llvm.llmoduleprovider -> t
+    = "llvm_ee_create_jit"
+  external dispose: t -> unit
+    = "llvm_ee_dispose"
+  external add_module_provider: Llvm.llmoduleprovider -> t -> unit
+    = "llvm_ee_add_mp"
+  external remove_module_provider: Llvm.llmoduleprovider -> t -> Llvm.llmodule
+    = "llvm_ee_remove_mp"
+  external find_function: string -> t -> Llvm.llvalue option
+    = "llvm_ee_find_function"
+  external run_function: Llvm.llvalue -> GenericValue.t array -> t ->
+                         GenericValue.t
+    = "llvm_ee_run_function"
+  external run_static_ctors: t -> unit
+    = "llvm_ee_run_static_ctors"
+  external run_static_dtors: t -> unit
+    = "llvm_ee_run_static_dtors"
+  external run_function_as_main: Llvm.llvalue -> string array ->
+                                 (string * string) array -> t -> int
+    = "llvm_ee_run_function_as_main"
+  external free_machine_code: Llvm.llvalue -> t -> unit
+    = "llvm_ee_free_machine_code"
+  
+  (* The following are not bound. Patches are welcome.
+  
+  get_target_data: t -> lltargetdata
+  add_global_mapping: llvalue -> llgenericvalue -> t -> unit
+  clear_all_global_mappings: t -> unit
+  update_global_mapping: llvalue -> llgenericvalue -> t -> unit
+  get_pointer_to_global_if_available: llvalue -> t -> llgenericvalue
+  get_pointer_to_global: llvalue -> t -> llgenericvalue
+  get_pointer_to_function: llvalue -> t -> llgenericvalue
+  get_pointer_to_function_or_stub: llvalue -> t -> llgenericvalue
+  get_global_value_at_address: llgenericvalue -> t -> llvalue option
+  store_value_to_memory: llgenericvalue -> llgenericvalue -> lltype -> unit
+  initialize_memory: llvalue -> llgenericvalue -> t -> unit
+  recompile_and_relink_function: llvalue -> t -> llgenericvalue
+  get_or_emit_global_variable: llvalue -> t -> llgenericvalue
+  disable_lazy_compilation: t -> unit
+  lazy_compilation_enabled: t -> bool
+  install_lazy_function_creator: (string -> llgenericvalue) -> t -> unit
+  
+   *)
+end
diff --git a/bindings/ocaml/executionengine/llvm_executionengine.mli b/bindings/ocaml/executionengine/llvm_executionengine.mli
new file mode 100644
index 0000000..a359774
--- /dev/null
+++ b/bindings/ocaml/executionengine/llvm_executionengine.mli
@@ -0,0 +1,152 @@
+(*===-- llvm_executionengine.mli - LLVM Ocaml Interface ---------*- C++ -*-===*
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file was developed by Gordon Henriksen and is distributed under the
+ * University of Illinois Open Source License. See LICENSE.TXT for details.
+ *
+ *===----------------------------------------------------------------------===
+ *
+ * This interface provides an ocaml API for LLVM execution engine (JIT/
+ * interpreter), the classes in the ExecutionEngine library.
+ *
+ *===----------------------------------------------------------------------===*)
+
+
+exception Error of string
+
+
+module GenericValue: sig
+  (** [GenericValue.t] is a boxed union type used to portably pass arguments to
+      and receive values from the execution engine. It supports only a limited
+      selection of types; for more complex argument types, it is necessary to
+      generate a stub function by hand or to pass parameters by reference.
+      See the struct [llvm::GenericValue]. **)
+  type t
+  
+  (** [of_float fpty n] boxes the float [n] in a float-valued generic value
+      according to the floating point type [fpty]. See the fields 
+      [llvm::GenericValue::DoubleVal] and [llvm::GenericValue::FloatVal]. **)
+  val of_float: Llvm.lltype -> float -> t
+  
+  (** [of_pointer v] boxes the pointer value [v] in a generic value. See the
+      field [llvm::GenericValue::PointerVal]. **)
+  val of_pointer: 'a -> t
+  
+  (** [of_int32 n w] boxes the int32 [i] in a generic value with the bitwidth
+      [w]. See the field [llvm::GenericValue::IntVal]. **)
+  val of_int32: Llvm.lltype -> int32 -> t
+  
+  (** [of_int n w] boxes the int [i] in a generic value with the bitwidth
+      [w]. See the field [llvm::GenericValue::IntVal]. **)
+  val of_int: Llvm.lltype -> int -> t
+  
+  (** [of_natint n w] boxes the native int [i] in a generic value with the
+      bitwidth [w]. See the field [llvm::GenericValue::IntVal]. **)
+  val of_nativeint: Llvm.lltype -> nativeint -> t
+  
+  (** [of_int64 n w] boxes the int64 [i] in a generic value with the bitwidth
+      [w]. See the field [llvm::GenericValue::IntVal]. **)
+  val of_int64: Llvm.lltype -> int64 -> t
+  
+  (** [as_float fpty gv] unboxes the floating point-valued generic value [gv] of
+      floating point type [fpty]. See the fields [llvm::GenericValue::DoubleVal]
+      and [llvm::GenericValue::FloatVal]. **)
+  val as_float: Llvm.lltype -> t -> float
+  
+  (** [as_pointer gv] unboxes the pointer-valued generic value [gv]. See the
+      field [llvm::GenericValue::PointerVal]. **)
+  val as_pointer: t -> 'a
+  
+  (** [as_int32 gv] unboxes the integer-valued generic value [gv] as an [int32].
+      Is invalid if [gv] has a bitwidth greater than 32 bits. See the field
+      [llvm::GenericValue::IntVal]. **)
+  val as_int32: t -> int32
+  
+  (** [as_int gv] unboxes the integer-valued generic value [gv] as an [int].
+      Is invalid if [gv] has a bitwidth greater than the host bit width (but the
+      most significant bit may be lost). See the field
+      [llvm::GenericValue::IntVal]. **)
+  val as_int: t -> int
+  
+  (** [as_natint gv] unboxes the integer-valued generic value [gv] as a
+      [nativeint]. Is invalid if [gv] has a bitwidth greater than
+      [nativeint]. See the field [llvm::GenericValue::IntVal]. **)
+  val as_nativeint: t -> nativeint
+  
+  (** [as_int64 gv] returns the integer-valued generic value [gv] as an [int64].
+      Is invalid if [gv] has a bitwidth greater than [int64]. See the field
+      [llvm::GenericValue::IntVal]. **)
+  val as_int64: t -> int64
+end
+
+
+module ExecutionEngine: sig
+  (** An execution engine is either a JIT compiler or an interpreter, capable of
+      directly loading an LLVM module and executing its functions without first
+      invoking a static compiler and generating a native executable. **)
+  type t
+  
+  (** [create mp] creates a new execution engine, taking ownership of the
+      module provider [mp] if successful. Creates a JIT if possible, else falls
+      back to an interpreter. Raises [Error msg] if an error occurrs. The
+      execution engine is not garbage collected and must be destroyed with
+      [dispose ee]. See the function [llvm::ExecutionEngine::create]. **)
+  val create: Llvm.llmoduleprovider -> t
+  
+  (** [create_interpreter mp] creates a new interpreter, taking ownership of the
+      module provider [mp] if successful. Raises [Error msg] if an error
+      occurrs. The execution engine is not garbage collected and must be
+      destroyed with [dispose ee].
+      See the function [llvm::ExecutionEngine::create]. **)
+  val create_interpreter: Llvm.llmoduleprovider -> t
+  
+  (** [create_jit mp] creates a new JIT (just-in-time compiler), taking
+      ownership of the module provider [mp] if successful. Raises [Error msg] if
+      an error occurrs. The execution engine is not garbage collected and must
+      be destroyed with [dispose ee].
+      See the function [llvm::ExecutionEngine::create]. **)
+  val create_jit: Llvm.llmoduleprovider -> t
+  
+  (** [dispose ee] releases the memory used by the execution engine and must be
+      invoked to avoid memory leaks. **)
+  val dispose: t -> unit
+  
+  (** [add_module_provider mp ee] adds the module provider [mp] to the execution
+      engine [ee]. **)
+  val add_module_provider: Llvm.llmoduleprovider -> t -> unit
+  
+  (** [remove_module_provider mp ee] removes the module provider [mp] from the
+      execution engine [ee], disposing of [mp] and the module referenced by
+      [mp]. Raises [Error msg] if an error occurs. **)
+  val remove_module_provider: Llvm.llmoduleprovider -> t -> Llvm.llmodule
+  
+  (** [find_function n ee] finds the function named [n] defined in any of the 
+      modules owned by the execution engine [ee]. Returns [None] if the function
+      is not found and [Some f] otherwise. **)
+  val find_function: string -> t -> Llvm.llvalue option
+  
+  (** [run_function f args ee] synchronously executes the function [f] with the
+      arguments [args], which must be compatible with the parameter types. **)
+  val run_function: Llvm.llvalue -> GenericValue.t array -> t ->
+                    GenericValue.t
+  
+  (** [run_static_ctors ee] executes the static constructors of each module in
+      the execution engine [ee]. **)
+  val run_static_ctors: t -> unit
+  
+  (** [run_static_dtors ee] executes the static destructors of each module in
+      the execution engine [ee]. **)
+  val run_static_dtors: t -> unit
+  
+  (** [run_function_as_main f args env ee] executes the function [f] as a main 
+      function, passing it [argv] and [argc] according to the string array
+      [args], and [envp] as specified by the array [env]. Returns the integer 
+      return value of the function. **)
+  val run_function_as_main: Llvm.llvalue -> string array ->
+                            (string * string) array -> t -> int
+  
+  (** [free_machine_code f ee] releases the memory in the execution engine [ee]
+      used to store the machine code for the function [f]. **)
+  val free_machine_code: Llvm.llvalue -> t -> unit
+end
diff --git a/bindings/ocaml/llvm/llvm_ocaml.c b/bindings/ocaml/llvm/llvm_ocaml.c
index 506b529..7224439 100644
--- a/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/bindings/ocaml/llvm/llvm_ocaml.c
@@ -18,7 +18,6 @@
 #include "llvm-c/Core.h"
 #include "caml/alloc.h"
 #include "caml/custom.h"
-#include "caml/mlvalues.h"
 #include "caml/memory.h"
 #include "caml/fail.h"
 #include "caml/callback.h"
@@ -37,7 +36,7 @@ CAMLprim value llvm_register_core_exns(value IoError) {
   return Val_unit;
 }
 
-void llvm_raise(value Prototype, char *Message) {
+static void llvm_raise(value Prototype, char *Message) {
   CAMLparam1(Prototype);
   CAMLlocal1(CamlMessage);
   
@@ -45,6 +44,7 @@ void llvm_raise(value Prototype, char *Message) {
   LLVMDisposeMessage(Message);
   
   raise_with_arg(Prototype, CamlMessage);
+  abort(); /* NOTREACHED */
   CAMLnoreturn;
 }
 
@@ -234,7 +234,7 @@ CAMLprim LLVMTypeRef llvm_opaque_type(value Unit) {
 
 #define Typehandle_val(v)  (*(LLVMTypeHandleRef *)(Data_custom_val(v)))
 
-void llvm_finalize_handle(value TH) {
+static void llvm_finalize_handle(value TH) {
   LLVMDisposeTypeHandle(Typehandle_val(TH));
 }
 
diff --git a/include/llvm-c/ExecutionEngine.h b/include/llvm-c/ExecutionEngine.h
new file mode 100644
index 0000000..f501086
--- /dev/null
+++ b/include/llvm-c/ExecutionEngine.h
@@ -0,0 +1,115 @@
+/*===-- llvm-c/ExecutionEngine.h - ExecutionEngine Lib C Iface --*- C++ -*-===*\
+|*                                                                            *|
+|*                     The LLVM Compiler Infrastructure                       *|
+|*                                                                            *|
+|* This file was developed by Gordon Henriksen and is distributed under the   *|
+|* University of Illinois Open Source License. See LICENSE.TXT for details.   *|
+|*                                                                            *|
+|*===----------------------------------------------------------------------===*|
+|*                                                                            *|
+|* This header declares the C interface to libLLVMExecutionEngine.o, which    *|
+|* implements various analyses of the LLVM IR.                                *|
+|*                                                                            *|
+|* Many exotic languages can interoperate with C code but have a harder time  *|
+|* with C++ due to name mangling. So in addition to C, this interface enables *|
+|* tools written in such languages.                                           *|
+|*                                                                            *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_C_EXECUTIONENGINE_H
+#define LLVM_C_EXECUTIONENGINE_H
+
+#include "llvm-c/Core.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct LLVMOpaqueGenericValue *LLVMGenericValueRef;
+typedef struct LLVMOpaqueExecutionEngine *LLVMExecutionEngineRef;
+
+/*===-- Operations on generic values --------------------------------------===*/
+
+LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
+                                                unsigned long long N,
+                                                int IsSigned);
+
+LLVMGenericValueRef LLVMCreateGenericValueOfPointer(void *P);
+
+LLVMGenericValueRef LLVMCreateGenericValueOfFloat(LLVMTypeRef Ty, double N);
+
+unsigned LLVMGenericValueIntWidth(LLVMGenericValueRef GenValRef);
+
+unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenVal,
+                                         int IsSigned);
+
+void *LLVMGenericValueToPointer(LLVMGenericValueRef GenVal);
+
+double LLVMGenericValueToFloat(LLVMTypeRef TyRef, LLVMGenericValueRef GenVal);
+
+void LLVMDisposeGenericValue(LLVMGenericValueRef GenVal);
+
+/*===-- Operations on execution engines -----------------------------------===*/
+
+int LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
+                              LLVMModuleProviderRef MP,
+                              char **OutError);
+
+int LLVMCreateInterpreter(LLVMExecutionEngineRef *OutInterp,
+                          LLVMModuleProviderRef MP,
+                          char **OutError);
+
+int LLVMCreateJITCompiler(LLVMExecutionEngineRef *OutJIT,
+                          LLVMModuleProviderRef MP,
+                          char **OutError);
+
+void LLVMDisposeExecutionEngine(LLVMExecutionEngineRef EE);
+
+void LLVMRunStaticConstructors(LLVMExecutionEngineRef EE);
+
+void LLVMRunStaticDestructors(LLVMExecutionEngineRef EE);
+
+int LLVMRunFunctionAsMain(LLVMExecutionEngineRef EE, LLVMValueRef F,
+                          unsigned ArgC, const char * const *ArgV,
+                          const char * const *EnvP);
+
+LLVMGenericValueRef LLVMRunFunction(LLVMExecutionEngineRef EE, LLVMValueRef F,
+                                    unsigned NumArgs,
+                                    LLVMGenericValueRef *Args);
+
+void LLVMFreeMachineCodeForFunction(LLVMExecutionEngineRef EE, LLVMValueRef F);
+
+void LLVMAddModuleProvider(LLVMExecutionEngineRef EE, LLVMModuleProviderRef MP);
+
+int LLVMRemoveModuleProvider(LLVMExecutionEngineRef EE,
+                             LLVMModuleProviderRef MP,
+                             LLVMModuleRef *OutMod, char **OutError);
+
+int LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
+                     LLVMValueRef *OutFn);
+
+#ifdef __cplusplus
+}
+
+namespace llvm {
+  class GenericValue;
+  class ExecutionEngine;
+  
+  #define DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref)   \
+    inline ty *unwrap(ref P) {                          \
+      return reinterpret_cast<ty*>(P);                  \
+    }                                                   \
+                                                        \
+    inline ref wrap(const ty *P) {                      \
+      return reinterpret_cast<ref>(const_cast<ty*>(P)); \
+    }
+  
+  DEFINE_SIMPLE_CONVERSION_FUNCTIONS(GenericValue,    LLVMGenericValueRef   )
+  DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ExecutionEngine, LLVMExecutionEngineRef)
+  
+  #undef DEFINE_SIMPLE_CONVERSION_FUNCTIONS
+}
+  
+#endif /* defined(__cplusplus) */
+
+#endif
diff --git a/lib/ExecutionEngine/ExecutionEngineBindings.cpp b/lib/ExecutionEngine/ExecutionEngineBindings.cpp
new file mode 100644
index 0000000..6ef3632
--- /dev/null
+++ b/lib/ExecutionEngine/ExecutionEngineBindings.cpp
@@ -0,0 +1,187 @@
+//===-- ExecutionEngineBindings.cpp - C bindings for EEs ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Gordon Henriksen and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the C bindings for the ExecutionEngine library.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "jit"
+#include "llvm-c/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+
+using namespace llvm;
+
+/*===-- Operations on generic values --------------------------------------===*/
+
+LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
+                                                unsigned long long N,
+                                                int IsSigned) {
+  GenericValue *GenVal = new GenericValue();
+  GenVal->IntVal = APInt(unwrap<IntegerType>(Ty)->getBitWidth(), N, IsSigned);
+  return wrap(GenVal);
+}
+
+LLVMGenericValueRef LLVMCreateGenericValueOfPointer(void *P) {
+  GenericValue *GenVal = new GenericValue();
+  GenVal->PointerVal = P;
+  return wrap(GenVal);
+}
+
+LLVMGenericValueRef LLVMCreateGenericValueOfFloat(LLVMTypeRef TyRef, double N) {
+  GenericValue *GenVal = new GenericValue();
+  switch (unwrap(TyRef)->getTypeID()) {
+  case Type::FloatTyID:
+    GenVal->FloatVal = N;
+    break;
+  case Type::DoubleTyID:
+    GenVal->DoubleVal = N;
+    break;
+  default:
+    assert(0 && "LLVMGenericValueToFloat supports only float and double.");
+    break;
+  }
+  return wrap(GenVal);
+}
+
+unsigned LLVMGenericValueIntWidth(LLVMGenericValueRef GenValRef) {
+  return unwrap(GenValRef)->IntVal.getBitWidth();
+}
+
+unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenValRef,
+                                         int IsSigned) {
+  GenericValue *GenVal = unwrap(GenValRef);
+  if (IsSigned)
+    return GenVal->IntVal.getSExtValue();
+  else
+    return GenVal->IntVal.getZExtValue();
+}
+
+void *LLVMGenericValueToPointer(LLVMGenericValueRef GenVal) {
+  return unwrap(GenVal)->PointerVal;
+}
+
+double LLVMGenericValueToFloat(LLVMTypeRef TyRef, LLVMGenericValueRef GenVal) {
+  switch (unwrap(TyRef)->getTypeID()) {
+  case Type::FloatTyID:
+    return unwrap(GenVal)->FloatVal;
+  case Type::DoubleTyID:
+    return unwrap(GenVal)->DoubleVal;
+  default:
+    assert(0 && "LLVMGenericValueToFloat supports only float and double.");
+    break;
+  }
+}
+
+void LLVMDisposeGenericValue(LLVMGenericValueRef GenVal) {
+  delete unwrap(GenVal);
+}
+
+/*===-- Operations on execution engines -----------------------------------===*/
+
+int LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
+                              LLVMModuleProviderRef MP,
+                              char **OutError) {
+  std::string Error;
+  if (ExecutionEngine *EE = ExecutionEngine::create(unwrap(MP), false, &Error)){
+    *OutEE = wrap(EE);
+    return 0;
+  }
+  *OutError = strdup(Error.c_str());
+  return 1;
+}
+
+int LLVMCreateInterpreter(LLVMExecutionEngineRef *OutInterp,
+                          LLVMModuleProviderRef MP,
+                          char **OutError) {
+  std::string Error;
+  if (ExecutionEngine *Interp = ExecutionEngine::create(unwrap(MP), &Error)) {
+    *OutInterp = wrap(Interp);
+    return 0;
+  }
+  *OutError = strdup(Error.c_str());
+  return 1;
+}
+
+int LLVMCreateJITCompiler(LLVMExecutionEngineRef *OutJIT,
+                          LLVMModuleProviderRef MP,
+                          char **OutError) {
+  std::string Error;
+  if (ExecutionEngine *JIT = ExecutionEngine::createJIT(unwrap(MP), &Error)) {
+    *OutJIT = wrap(JIT);
+    return 0;
+  }
+  *OutError = strdup(Error.c_str());
+  return 1;
+}
+
+void LLVMDisposeExecutionEngine(LLVMExecutionEngineRef EE) {
+  delete unwrap(EE);
+}
+
+void LLVMRunStaticConstructors(LLVMExecutionEngineRef EE) {
+  unwrap(EE)->runStaticConstructorsDestructors(false);
+}
+
+void LLVMRunStaticDestructors(LLVMExecutionEngineRef EE) {
+  unwrap(EE)->runStaticConstructorsDestructors(true);
+}
+
+int LLVMRunFunctionAsMain(LLVMExecutionEngineRef EE, LLVMValueRef F,
+                          unsigned ArgC, const char * const *ArgV,
+                          const char * const *EnvP) {
+  std::vector<std::string> ArgVec;
+  for (unsigned I = 0; I != ArgC; ++I)
+    ArgVec.push_back(ArgV[I]);
+  
+  return unwrap(EE)->runFunctionAsMain(unwrap<Function>(F), ArgVec, EnvP);
+}
+
+LLVMGenericValueRef LLVMRunFunction(LLVMExecutionEngineRef EE, LLVMValueRef F,
+                                    unsigned NumArgs,
+                                    LLVMGenericValueRef *Args) {
+  std::vector<GenericValue> ArgVec;
+  ArgVec.reserve(NumArgs);
+  for (unsigned I = 0; I != NumArgs; ++I)
+    ArgVec.push_back(*unwrap(Args[I]));
+  
+  GenericValue *Result = new GenericValue();
+  *Result = unwrap(EE)->runFunction(unwrap<Function>(F), ArgVec);
+  return wrap(Result);
+}
+
+void LLVMFreeMachineCodeForFunction(LLVMExecutionEngineRef EE, LLVMValueRef F) {
+  unwrap(EE)->freeMachineCodeForFunction(unwrap<Function>(F));
+}
+
+void LLVMAddModuleProvider(LLVMExecutionEngineRef EE, LLVMModuleProviderRef MP){
+  unwrap(EE)->addModuleProvider(unwrap(MP));
+}
+
+int LLVMRemoveModuleProvider(LLVMExecutionEngineRef EE,
+                             LLVMModuleProviderRef MP,
+                             LLVMModuleRef *OutMod, char **OutError) {
+  std::string Error;
+  if (Module *Gone = unwrap(EE)->removeModuleProvider(unwrap(MP), &Error)) {
+    *OutMod = wrap(Gone);
+    return 0;
+  }
+  if (OutError)
+    *OutError = strdup(Error.c_str());
+  return 1;
+}
+
+int LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
+                     LLVMValueRef *OutFn) {
+  if (Function *F = unwrap(EE)->FindFunctionNamed(Name)) {
+    *OutFn = wrap(F);
+    return 0;
+  }
+  return 1;
+}
diff --git a/test/Bindings/Ocaml/executionengine.ml b/test/Bindings/Ocaml/executionengine.ml
new file mode 100644
index 0000000..d2ba147
--- /dev/null
+++ b/test/Bindings/Ocaml/executionengine.ml
@@ -0,0 +1,101 @@
+(* RUN: %ocamlc -warn-error A llvm.cma llvm_executionengine.cma %s -o %t
+ * RUN: ./%t %t.bc
+ *)
+
+open Llvm
+open Llvm_executionengine
+
+(* Note that this takes a moment to link, so it's best to keep the number of
+   individual tests low. *)
+
+let bomb msg =
+  prerr_endline msg;
+  exit 2
+
+let define_main_fn m retval =
+  let fn =
+    let str_arr_type = pointer_type (pointer_type i8_type) in
+    define_function "main" (function_type i32_type [| i32_type;
+                                                      str_arr_type;
+                                                      str_arr_type |]) m in
+  let b = builder_at_end (entry_block fn) in
+  ignore (build_ret (const_int i32_type retval) b);
+  fn
+
+let define_plus m =
+  let fn = define_function "plus" (function_type i32_type [| i32_type;
+                                                             i32_type |]) m in
+  let b = builder_at_end (entry_block fn) in
+  let add = build_add (param fn 0) (param fn 1) "sum" b in
+  ignore (build_ret add b)
+
+let test_genericvalue () =
+  let tu = (1, 2) in
+  let ptrgv = GenericValue.of_pointer tu in
+  assert (tu = GenericValue.as_pointer ptrgv);
+  
+  let fpgv = GenericValue.of_float double_type 2. in
+  assert (2. = GenericValue.as_float double_type fpgv);
+  
+  let intgv = GenericValue.of_int i32_type 3 in
+  assert (3  = GenericValue.as_int intgv);
+  
+  let i32gv = GenericValue.of_int32 i32_type 4l in
+  assert (4l = GenericValue.as_int32 i32gv);
+  
+  let nigv = GenericValue.of_nativeint i32_type 5n in
+  assert (5n = GenericValue.as_nativeint nigv);
+  
+  let i64gv = GenericValue.of_int64 i64_type 6L in
+  assert (6L = GenericValue.as_int64 i64gv)
+
+let test_executionengine () =
+  (* create *)
+  let m = create_module "test_module" in
+  let main = define_main_fn m 42 in
+  
+  let m2 = create_module "test_module2" in
+  define_plus m2;
+  
+  let ee = ExecutionEngine.create (ModuleProvider.create m) in
+  let mp2 = ModuleProvider.create m2 in
+  ExecutionEngine.add_module_provider mp2 ee;
+  
+  (* run_static_ctors *)
+  ExecutionEngine.run_static_ctors ee;
+  
+  (* run_function_as_main *)
+  let res = ExecutionEngine.run_function_as_main main [|"test"|] [||] ee in
+  if 42 != res then bomb "main did not return 42";
+  
+  (* free_machine_code *)
+  ExecutionEngine.free_machine_code main ee;
+  
+  (* find_function *)
+  match ExecutionEngine.find_function "dne" ee with
+  | Some _ -> raise (Failure "find_function 'dne' failed")
+  | None ->
+  
+  match ExecutionEngine.find_function "plus" ee with
+  | None -> raise (Failure "find_function 'plus' failed")
+  | Some plus ->
+  
+  (* run_function *)
+  let res = ExecutionEngine.run_function plus
+                                         [| GenericValue.of_int i32_type 2;
+                                            GenericValue.of_int i32_type 2 |]
+                                         ee in
+  if 4 != GenericValue.as_int res then bomb "plus did not work";
+  
+  (* remove_module_provider *)
+  Llvm.dispose_module (ExecutionEngine.remove_module_provider mp2 ee);
+  
+  (* run_static_dtors *)
+  ExecutionEngine.run_static_dtors ee;
+  
+  (* dispose *)
+  ExecutionEngine.dispose ee
+
+let _ =
+  test_genericvalue ();
+  test_executionengine ()