diff --git a/include/llvm-c/Analysis.h b/include/llvm-c/Analysis.h
index 68d8e65..e1e4487 100644
--- a/include/llvm-c/Analysis.h
+++ b/include/llvm-c/Analysis.h
@@ -36,12 +36,12 @@
 /* Verifies that a module is valid, taking the specified action if not.
    Optionally returns a human-readable description of any invalid constructs.
    OutMessage must be disposed with LLVMDisposeMessage. */
-int LLVMVerifyModule(LLVMModuleRef M, LLVMVerifierFailureAction Action,
-                     char **OutMessage);
+LLVMBool LLVMVerifyModule(LLVMModuleRef M, LLVMVerifierFailureAction Action,
+                          char **OutMessage);
 
 /* Verifies that a single function is valid, taking the specified action. Useful
    for debugging. */
-int LLVMVerifyFunction(LLVMValueRef Fn, LLVMVerifierFailureAction Action);
+LLVMBool LLVMVerifyFunction(LLVMValueRef Fn, LLVMVerifierFailureAction Action);
 
 /* Open up a ghostview window that displays the CFG of the current function.
    Useful for debugging. */
diff --git a/include/llvm-c/BitReader.h b/include/llvm-c/BitReader.h
index a184f60..59269ce 100644
--- a/include/llvm-c/BitReader.h
+++ b/include/llvm-c/BitReader.h
@@ -29,24 +29,24 @@
 /* Builds a module from the bitcode in the specified memory buffer, returning a
    reference to the module via the OutModule parameter. Returns 0 on success.
    Optionally returns a human-readable error message via OutMessage. */ 
-int LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
-                     LLVMModuleRef *OutModule, char **OutMessage);
+LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
+                          LLVMModuleRef *OutModule, char **OutMessage);
 
-int LLVMParseBitcodeInContext(LLVMContextRef ContextRef,
-                              LLVMMemoryBufferRef MemBuf,
-                              LLVMModuleRef *OutModule, char **OutMessage);
+LLVMBool LLVMParseBitcodeInContext(LLVMContextRef ContextRef,
+                                   LLVMMemoryBufferRef MemBuf,
+                                   LLVMModuleRef *OutModule, char **OutMessage);
 
 /* Reads a module from the specified path, returning via the OutMP parameter
    a module provider which performs lazy deserialization. Returns 0 on success.
    Optionally returns a human-readable error message via OutMessage. */ 
-int LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
-                                 LLVMModuleProviderRef *OutMP,
-                                 char **OutMessage);
+LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
+                                      LLVMModuleProviderRef *OutMP,
+                                      char **OutMessage);
 
-int LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,
-                                          LLVMMemoryBufferRef MemBuf,
-                                          LLVMModuleProviderRef *OutMP,
-                                          char **OutMessage);
+LLVMBool LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,
+                                               LLVMMemoryBufferRef MemBuf,
+                                               LLVMModuleProviderRef *OutMP,
+                                               char **OutMessage);
 
 
 #ifdef __cplusplus
diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index c7f653f..6879205 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -46,6 +46,8 @@
 #endif
 
 
+typedef int LLVMBool;
+
 /* Opaque types. */
 
 /**
@@ -292,7 +294,7 @@
 void LLVMSetTarget(LLVMModuleRef M, const char *Triple);
 
 /** See Module::addTypeName. */
-int LLVMAddTypeName(LLVMModuleRef M, const char *Name, LLVMTypeRef Ty);
+LLVMBool LLVMAddTypeName(LLVMModuleRef M, const char *Name, LLVMTypeRef Ty);
 void LLVMDeleteTypeName(LLVMModuleRef M, const char *Name);
 LLVMTypeRef LLVMGetTypeByName(LLVMModuleRef M, const char *Name);
 
@@ -355,20 +357,20 @@
 /* Operations on function types */
 LLVMTypeRef LLVMFunctionType(LLVMTypeRef ReturnType,
                              LLVMTypeRef *ParamTypes, unsigned ParamCount,
-                             int IsVarArg);
-int LLVMIsFunctionVarArg(LLVMTypeRef FunctionTy);
+                             LLVMBool IsVarArg);
+LLVMBool LLVMIsFunctionVarArg(LLVMTypeRef FunctionTy);
 LLVMTypeRef LLVMGetReturnType(LLVMTypeRef FunctionTy);
 unsigned LLVMCountParamTypes(LLVMTypeRef FunctionTy);
 void LLVMGetParamTypes(LLVMTypeRef FunctionTy, LLVMTypeRef *Dest);
 
 /* Operations on struct types */
 LLVMTypeRef LLVMStructTypeInContext(LLVMContextRef C, LLVMTypeRef *ElementTypes,
-                                    unsigned ElementCount, int Packed);
+                                    unsigned ElementCount, LLVMBool Packed);
 LLVMTypeRef LLVMStructType(LLVMTypeRef *ElementTypes, unsigned ElementCount,
-                           int Packed);
+                           LLVMBool Packed);
 unsigned LLVMCountStructElementTypes(LLVMTypeRef StructTy);
 void LLVMGetStructElementTypes(LLVMTypeRef StructTy, LLVMTypeRef *Dest);
-int LLVMIsPackedStruct(LLVMTypeRef StructTy);
+LLVMBool LLVMIsPackedStruct(LLVMTypeRef StructTy);
 
 /* Operations on array, pointer, and vector types (sequence types) */
 LLVMTypeRef LLVMArrayType(LLVMTypeRef ElementType, unsigned ElementCount);
@@ -495,14 +497,14 @@
 LLVMValueRef LLVMConstNull(LLVMTypeRef Ty); /* all zeroes */
 LLVMValueRef LLVMConstAllOnes(LLVMTypeRef Ty); /* only for int/vector */
 LLVMValueRef LLVMGetUndef(LLVMTypeRef Ty);
-int LLVMIsConstant(LLVMValueRef Val);
-int LLVMIsNull(LLVMValueRef Val);
-int LLVMIsUndef(LLVMValueRef Val);
+LLVMBool LLVMIsConstant(LLVMValueRef Val);
+LLVMBool LLVMIsNull(LLVMValueRef Val);
+LLVMBool LLVMIsUndef(LLVMValueRef Val);
 LLVMValueRef LLVMConstPointerNull(LLVMTypeRef Ty);
 
 /* Operations on scalar constants */
 LLVMValueRef LLVMConstInt(LLVMTypeRef IntTy, unsigned long long N,
-                          int SignExtend);
+                          LLVMBool SignExtend);
 LLVMValueRef LLVMConstIntOfString(LLVMTypeRef IntTy, const char *Text,
                                   uint8_t Radix);
 LLVMValueRef LLVMConstIntOfStringAndSize(LLVMTypeRef IntTy, const char *Text,
@@ -517,17 +519,17 @@
 
 /* Operations on composite constants */
 LLVMValueRef LLVMConstStringInContext(LLVMContextRef C, const char *Str,
-                                      unsigned Length, int DontNullTerminate);
+                                      unsigned Length, LLVMBool DontNullTerminate);
 LLVMValueRef LLVMConstStructInContext(LLVMContextRef C, 
                                       LLVMValueRef *ConstantVals,
-                                      unsigned Count, int Packed);
+                                      unsigned Count, LLVMBool Packed);
 
 LLVMValueRef LLVMConstString(const char *Str, unsigned Length,
-                             int DontNullTerminate);
+                             LLVMBool DontNullTerminate);
 LLVMValueRef LLVMConstArray(LLVMTypeRef ElementTy,
                             LLVMValueRef *ConstantVals, unsigned Length);
 LLVMValueRef LLVMConstStruct(LLVMValueRef *ConstantVals, unsigned Count,
-                             int Packed);
+                             LLVMBool Packed);
 LLVMValueRef LLVMConstVector(LLVMValueRef *ScalarConstantVals, unsigned Size);
 
 /* Constant expressions */
@@ -587,7 +589,7 @@
 LLVMValueRef LLVMConstPointerCast(LLVMValueRef ConstantVal,
                                   LLVMTypeRef ToType);
 LLVMValueRef LLVMConstIntCast(LLVMValueRef ConstantVal, LLVMTypeRef ToType,
-                              unsigned isSigned);
+                              LLVMBool isSigned);
 LLVMValueRef LLVMConstFPCast(LLVMValueRef ConstantVal, LLVMTypeRef ToType);
 LLVMValueRef LLVMConstSelect(LLVMValueRef ConstantCondition,
                              LLVMValueRef ConstantIfTrue,
@@ -605,13 +607,13 @@
 LLVMValueRef LLVMConstInsertValue(LLVMValueRef AggConstant,
                                   LLVMValueRef ElementValueConstant,
                                   unsigned *IdxList, unsigned NumIdx);
-LLVMValueRef LLVMConstInlineAsm(LLVMTypeRef Ty, 
+LLVMValueRef LLVMConstInlineAsm(LLVMTypeRef Ty,
                                 const char *AsmString, const char *Constraints,
-                                int HasSideEffects);
+                                LLVMBool HasSideEffects, LLVMBool IsAlignStack);
 
 /* Operations on global variables, functions, and aliases (globals) */
 LLVMModuleRef LLVMGetGlobalParent(LLVMValueRef Global);
-int LLVMIsDeclaration(LLVMValueRef Global);
+LLVMBool LLVMIsDeclaration(LLVMValueRef Global);
 LLVMLinkage LLVMGetLinkage(LLVMValueRef Global);
 void LLVMSetLinkage(LLVMValueRef Global, LLVMLinkage Linkage);
 const char *LLVMGetSection(LLVMValueRef Global);
@@ -631,10 +633,10 @@
 void LLVMDeleteGlobal(LLVMValueRef GlobalVar);
 LLVMValueRef LLVMGetInitializer(LLVMValueRef GlobalVar);
 void LLVMSetInitializer(LLVMValueRef GlobalVar, LLVMValueRef ConstantVal);
-int LLVMIsThreadLocal(LLVMValueRef GlobalVar);
-void LLVMSetThreadLocal(LLVMValueRef GlobalVar, int IsThreadLocal);
-int LLVMIsGlobalConstant(LLVMValueRef GlobalVar);
-void LLVMSetGlobalConstant(LLVMValueRef GlobalVar, int IsConstant);
+LLVMBool LLVMIsThreadLocal(LLVMValueRef GlobalVar);
+void LLVMSetThreadLocal(LLVMValueRef GlobalVar, LLVMBool IsThreadLocal);
+LLVMBool LLVMIsGlobalConstant(LLVMValueRef GlobalVar);
+void LLVMSetGlobalConstant(LLVMValueRef GlobalVar, LLVMBool IsConstant);
 
 /* Operations on aliases */
 LLVMValueRef LLVMAddAlias(LLVMModuleRef M, LLVMTypeRef Ty, LLVMValueRef Aliasee,
@@ -674,7 +676,7 @@
 
 /* Operations on basic blocks */
 LLVMValueRef LLVMBasicBlockAsValue(LLVMBasicBlockRef BB);
-int LLVMValueIsBasicBlock(LLVMValueRef Val);
+LLVMBool LLVMValueIsBasicBlock(LLVMValueRef Val);
 LLVMBasicBlockRef LLVMValueAsBasicBlock(LLVMValueRef Val);
 LLVMValueRef LLVMGetBasicBlockParent(LLVMBasicBlockRef BB);
 unsigned LLVMCountBasicBlocks(LLVMValueRef Fn);
@@ -714,8 +716,8 @@
                                 unsigned align);
 
 /* Operations on call instructions (only) */
-int LLVMIsTailCall(LLVMValueRef CallInst);
-void LLVMSetTailCall(LLVMValueRef CallInst, int IsTailCall);
+LLVMBool LLVMIsTailCall(LLVMValueRef CallInst);
+void LLVMSetTailCall(LLVMValueRef CallInst, LLVMBool IsTailCall);
 
 /* Operations on phi nodes */
 void LLVMAddIncoming(LLVMValueRef PhiNode, LLVMValueRef *IncomingValues,
@@ -928,11 +930,11 @@
 
 /*===-- Memory buffers ----------------------------------------------------===*/
 
-int LLVMCreateMemoryBufferWithContentsOfFile(const char *Path,
-                                             LLVMMemoryBufferRef *OutMemBuf,
-                                             char **OutMessage);
-int LLVMCreateMemoryBufferWithSTDIN(LLVMMemoryBufferRef *OutMemBuf,
-                                    char **OutMessage);
+LLVMBool LLVMCreateMemoryBufferWithContentsOfFile(const char *Path,
+                                                  LLVMMemoryBufferRef *OutMemBuf,
+                                                  char **OutMessage);
+LLVMBool LLVMCreateMemoryBufferWithSTDIN(LLVMMemoryBufferRef *OutMemBuf,
+                                         char **OutMessage);
 void LLVMDisposeMemoryBuffer(LLVMMemoryBufferRef MemBuf);
 
 
@@ -952,23 +954,23 @@
 /** Initializes, executes on the provided module, and finalizes all of the
     passes scheduled in the pass manager. Returns 1 if any of the passes
     modified the module, 0 otherwise. See llvm::PassManager::run(Module&). */
-int LLVMRunPassManager(LLVMPassManagerRef PM, LLVMModuleRef M);
+LLVMBool LLVMRunPassManager(LLVMPassManagerRef PM, LLVMModuleRef M);
 
 /** Initializes all of the function passes scheduled in the function pass
     manager. Returns 1 if any of the passes modified the module, 0 otherwise.
     See llvm::FunctionPassManager::doInitialization. */
-int LLVMInitializeFunctionPassManager(LLVMPassManagerRef FPM);
+LLVMBool LLVMInitializeFunctionPassManager(LLVMPassManagerRef FPM);
 
 /** Executes all of the function passes scheduled in the function pass manager
     on the provided function. Returns 1 if any of the passes modified the
     function, false otherwise.
     See llvm::FunctionPassManager::run(Function&). */
-int LLVMRunFunctionPassManager(LLVMPassManagerRef FPM, LLVMValueRef F);
+LLVMBool LLVMRunFunctionPassManager(LLVMPassManagerRef FPM, LLVMValueRef F);
 
 /** Finalizes all of the function passes scheduled in in the function pass
     manager. Returns 1 if any of the passes modified the module, 0 otherwise.
     See llvm::FunctionPassManager::doFinalization. */
-int LLVMFinalizeFunctionPassManager(LLVMPassManagerRef FPM);
+LLVMBool LLVMFinalizeFunctionPassManager(LLVMPassManagerRef FPM);
 
 /** Frees the memory of a pass pipeline. For function pipelines, does not free
     the module provider.
diff --git a/include/llvm-c/ExecutionEngine.h b/include/llvm-c/ExecutionEngine.h
index 05f2a89..151c935 100644
--- a/include/llvm-c/ExecutionEngine.h
+++ b/include/llvm-c/ExecutionEngine.h
@@ -36,7 +36,7 @@
 
 LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
                                                 unsigned long long N,
-                                                int IsSigned);
+                                                LLVMBool IsSigned);
 
 LLVMGenericValueRef LLVMCreateGenericValueOfPointer(void *P);
 
@@ -45,7 +45,7 @@
 unsigned LLVMGenericValueIntWidth(LLVMGenericValueRef GenValRef);
 
 unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenVal,
-                                         int IsSigned);
+                                         LLVMBool IsSigned);
 
 void *LLVMGenericValueToPointer(LLVMGenericValueRef GenVal);
 
@@ -55,18 +55,18 @@
 
 /*===-- Operations on execution engines -----------------------------------===*/
 
-int LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
-                              LLVMModuleProviderRef MP,
-                              char **OutError);
+LLVMBool LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
+                                   LLVMModuleProviderRef MP,
+                                   char **OutError);
 
-int LLVMCreateInterpreter(LLVMExecutionEngineRef *OutInterp,
-                          LLVMModuleProviderRef MP,
-                          char **OutError);
+LLVMBool LLVMCreateInterpreter(LLVMExecutionEngineRef *OutInterp,
+                               LLVMModuleProviderRef MP,
+                               char **OutError);
 
-int LLVMCreateJITCompiler(LLVMExecutionEngineRef *OutJIT,
-                          LLVMModuleProviderRef MP,
-                          unsigned OptLevel,
-                          char **OutError);
+LLVMBool LLVMCreateJITCompiler(LLVMExecutionEngineRef *OutJIT,
+                               LLVMModuleProviderRef MP,
+                               unsigned OptLevel,
+                               char **OutError);
 
 void LLVMDisposeExecutionEngine(LLVMExecutionEngineRef EE);
 
@@ -86,12 +86,12 @@
 
 void LLVMAddModuleProvider(LLVMExecutionEngineRef EE, LLVMModuleProviderRef MP);
 
-int LLVMRemoveModuleProvider(LLVMExecutionEngineRef EE,
-                             LLVMModuleProviderRef MP,
-                             LLVMModuleRef *OutMod, char **OutError);
+LLVMBool LLVMRemoveModuleProvider(LLVMExecutionEngineRef EE,
+                                  LLVMModuleProviderRef MP,
+                                  LLVMModuleRef *OutMod, char **OutError);
 
-int LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
-                     LLVMValueRef *OutFn);
+LLVMBool LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
+                          LLVMValueRef *OutFn);
 
 LLVMTargetDataRef LLVMGetExecutionEngineTargetData(LLVMExecutionEngineRef EE);
 
diff --git a/include/llvm-c/Target.h b/include/llvm-c/Target.h
index 0057182..5c85a47 100644
--- a/include/llvm-c/Target.h
+++ b/include/llvm-c/Target.h
@@ -26,8 +26,7 @@
 extern "C" {
 #endif
 
-enum { LLVMBigEndian, LLVMLittleEndian };
-typedef int LLVMByteOrdering;
+enum LLVMByteOrdering { LLVMBigEndian, LLVMLittleEndian };
 
 typedef struct LLVMOpaqueTargetData *LLVMTargetDataRef;
 typedef struct LLVMStructLayout *LLVMStructLayoutRef;
@@ -62,7 +61,7 @@
 /** LLVMInitializeNativeTarget - The main program should call this function to
     initialize the native target corresponding to the host.  This is useful 
     for JIT applications to ensure that the target gets linked in correctly. */
-static inline int LLVMInitializeNativeTarget() {
+static inline LLVMBool LLVMInitializeNativeTarget() {
   /* If we have a native target, initialize it to ensure it is linked in. */
 #ifdef LLVM_NATIVE_ARCH
 #define DoInit2(TARG) \
diff --git a/lib/Analysis/Analysis.cpp b/lib/Analysis/Analysis.cpp
index f8cb323..398dec7 100644
--- a/lib/Analysis/Analysis.cpp
+++ b/lib/Analysis/Analysis.cpp
@@ -13,11 +13,11 @@
 
 using namespace llvm;
 
-int LLVMVerifyModule(LLVMModuleRef M, LLVMVerifierFailureAction Action,
-                     char **OutMessages) {
+LLVMBool LLVMVerifyModule(LLVMModuleRef M, LLVMVerifierFailureAction Action,
+                          char **OutMessages) {
   std::string Messages;
   
-  int Result = verifyModule(*unwrap(M),
+  LLVMBool Result = verifyModule(*unwrap(M),
                             static_cast<VerifierFailureAction>(Action),
                             OutMessages? &Messages : 0);
   
@@ -27,7 +27,7 @@
   return Result;
 }
 
-int LLVMVerifyFunction(LLVMValueRef Fn, LLVMVerifierFailureAction Action) {
+LLVMBool LLVMVerifyFunction(LLVMValueRef Fn, LLVMVerifierFailureAction Action) {
   return verifyFunction(*unwrap<Function>(Fn),
                         static_cast<VerifierFailureAction>(Action));
 }
diff --git a/lib/Bitcode/Reader/BitReader.cpp b/lib/Bitcode/Reader/BitReader.cpp
index f513d41..32b97e8 100644
--- a/lib/Bitcode/Reader/BitReader.cpp
+++ b/lib/Bitcode/Reader/BitReader.cpp
@@ -18,9 +18,9 @@
 
 /* Builds a module from the bitcode in the specified memory buffer, returning a
    reference to the module via the OutModule parameter. Returns 0 on success.
-   Optionally returns a human-readable error message via OutMessage. */ 
-int LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
-                     LLVMModuleRef *OutModule, char **OutMessage) {
+   Optionally returns a human-readable error message via OutMessage. */
+LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
+                          LLVMModuleRef *OutModule, char **OutMessage) {
   std::string Message;
   
   *OutModule = wrap(ParseBitcodeFile(unwrap(MemBuf), getGlobalContext(),  
@@ -34,9 +34,10 @@
   return 0;
 }
 
-int LLVMParseBitcodeInContext(LLVMContextRef ContextRef,
-                              LLVMMemoryBufferRef MemBuf,
-                              LLVMModuleRef *OutModule, char **OutMessage) {
+LLVMBool LLVMParseBitcodeInContext(LLVMContextRef ContextRef,
+                                   LLVMMemoryBufferRef MemBuf,
+                                   LLVMModuleRef *OutModule,
+                                   char **OutMessage) {
   std::string Message;
   
   *OutModule = wrap(ParseBitcodeFile(unwrap(MemBuf), *unwrap(ContextRef),
@@ -53,9 +54,9 @@
 /* Reads a module from the specified path, returning via the OutModule parameter
    a module provider which performs lazy deserialization. Returns 0 on success.
    Optionally returns a human-readable error message via OutMessage. */ 
-int LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
-                                 LLVMModuleProviderRef *OutMP,
-                                  char **OutMessage) {
+LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
+                                      LLVMModuleProviderRef *OutMP,
+                                      char **OutMessage) {
   std::string Message;
 
   *OutMP = wrap(getBitcodeModuleProvider(unwrap(MemBuf), getGlobalContext(), 
@@ -70,10 +71,10 @@
   return 0;
 }
 
-int LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,
-                                          LLVMMemoryBufferRef MemBuf,
-                                          LLVMModuleProviderRef *OutMP,
-                                          char **OutMessage) {
+LLVMBool LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,
+                                               LLVMMemoryBufferRef MemBuf,
+                                               LLVMModuleProviderRef *OutMP,
+                                               char **OutMessage) {
   std::string Message;
   
   *OutMP = wrap(getBitcodeModuleProvider(unwrap(MemBuf), *unwrap(ContextRef),
diff --git a/lib/ExecutionEngine/ExecutionEngineBindings.cpp b/lib/ExecutionEngine/ExecutionEngineBindings.cpp
index 5901cd7..412b493 100644
--- a/lib/ExecutionEngine/ExecutionEngineBindings.cpp
+++ b/lib/ExecutionEngine/ExecutionEngineBindings.cpp
@@ -24,7 +24,7 @@
 
 LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
                                                 unsigned long long N,
-                                                int IsSigned) {
+                                                LLVMBool IsSigned) {
   GenericValue *GenVal = new GenericValue();
   GenVal->IntVal = APInt(unwrap<IntegerType>(Ty)->getBitWidth(), N, IsSigned);
   return wrap(GenVal);
@@ -56,7 +56,7 @@
 }
 
 unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenValRef,
-                                         int IsSigned) {
+                                         LLVMBool IsSigned) {
   GenericValue *GenVal = unwrap(GenValRef);
   if (IsSigned)
     return GenVal->IntVal.getSExtValue();
@@ -87,9 +87,9 @@
 
 /*===-- Operations on execution engines -----------------------------------===*/
 
-int LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
-                              LLVMModuleProviderRef MP,
-                              char **OutError) {
+LLVMBool LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
+                                   LLVMModuleProviderRef MP,
+                                   char **OutError) {
   std::string Error;
   EngineBuilder builder(unwrap(MP));
   builder.setEngineKind(EngineKind::Either)
@@ -102,9 +102,9 @@
   return 1;
 }
 
-int LLVMCreateInterpreter(LLVMExecutionEngineRef *OutInterp,
-                          LLVMModuleProviderRef MP,
-                          char **OutError) {
+LLVMBool LLVMCreateInterpreter(LLVMExecutionEngineRef *OutInterp,
+                               LLVMModuleProviderRef MP,
+                               char **OutError) {
   std::string Error;
   EngineBuilder builder(unwrap(MP));
   builder.setEngineKind(EngineKind::Interpreter)
@@ -117,10 +117,10 @@
   return 1;
 }
 
-int LLVMCreateJITCompiler(LLVMExecutionEngineRef *OutJIT,
-                          LLVMModuleProviderRef MP,
-                          unsigned OptLevel,
-                          char **OutError) {
+LLVMBool LLVMCreateJITCompiler(LLVMExecutionEngineRef *OutJIT,
+                               LLVMModuleProviderRef MP,
+                               unsigned OptLevel,
+                               char **OutError) {
   std::string Error;
   EngineBuilder builder(unwrap(MP));
   builder.setEngineKind(EngineKind::JIT)
@@ -177,9 +177,9 @@
   unwrap(EE)->addModuleProvider(unwrap(MP));
 }
 
-int LLVMRemoveModuleProvider(LLVMExecutionEngineRef EE,
-                             LLVMModuleProviderRef MP,
-                             LLVMModuleRef *OutMod, char **OutError) {
+LLVMBool LLVMRemoveModuleProvider(LLVMExecutionEngineRef EE,
+                                  LLVMModuleProviderRef MP,
+                                  LLVMModuleRef *OutMod, char **OutError) {
   std::string Error;
   if (Module *Gone = unwrap(EE)->removeModuleProvider(unwrap(MP), &Error)) {
     *OutMod = wrap(Gone);
@@ -190,8 +190,8 @@
   return 1;
 }
 
-int LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
-                     LLVMValueRef *OutFn) {
+LLVMBool LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
+                          LLVMValueRef *OutFn) {
   if (Function *F = unwrap(EE)->FindFunctionNamed(Name)) {
     *OutFn = wrap(F);
     return 0;
diff --git a/lib/Target/Target.cpp b/lib/Target/Target.cpp
index cddf49e..f5c969a 100644
--- a/lib/Target/Target.cpp
+++ b/lib/Target/Target.cpp
@@ -34,7 +34,7 @@
 }
 
 LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef TD) {
-  return unwrap(TD)->isLittleEndian();
+  return unwrap(TD)->isLittleEndian() ? LLVMLittleEndian : LLVMBigEndian;
 }
 
 unsigned LLVMPointerSize(LLVMTargetDataRef TD) {
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index 449e967..984d245 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -89,7 +89,7 @@
 }
 
 /*--.. Type names ..........................................................--*/
-int LLVMAddTypeName(LLVMModuleRef M, const char *Name, LLVMTypeRef Ty) {
+LLVMBool LLVMAddTypeName(LLVMModuleRef M, const char *Name, LLVMTypeRef Ty) {
   return unwrap(M)->addTypeName(Name, unwrap(Ty));
 }
 
@@ -237,7 +237,7 @@
 
 LLVMTypeRef LLVMFunctionType(LLVMTypeRef ReturnType,
                              LLVMTypeRef *ParamTypes, unsigned ParamCount,
-                             int IsVarArg) {
+                             LLVMBool IsVarArg) {
   std::vector<const Type*> Tys;
   for (LLVMTypeRef *I = ParamTypes, *E = ParamTypes + ParamCount; I != E; ++I)
     Tys.push_back(unwrap(*I));
@@ -245,7 +245,7 @@
   return wrap(FunctionType::get(unwrap(ReturnType), Tys, IsVarArg != 0));
 }
 
-int LLVMIsFunctionVarArg(LLVMTypeRef FunctionTy) {
+LLVMBool LLVMIsFunctionVarArg(LLVMTypeRef FunctionTy) {
   return unwrap<FunctionType>(FunctionTy)->isVarArg();
 }
 
@@ -267,7 +267,7 @@
 /*--.. Operations on struct types ..........................................--*/
 
 LLVMTypeRef LLVMStructTypeInContext(LLVMContextRef C, LLVMTypeRef *ElementTypes,
-                           unsigned ElementCount, int Packed) {
+                           unsigned ElementCount, LLVMBool Packed) {
   std::vector<const Type*> Tys;
   for (LLVMTypeRef *I = ElementTypes,
                    *E = ElementTypes + ElementCount; I != E; ++I)
@@ -277,7 +277,7 @@
 }
 
 LLVMTypeRef LLVMStructType(LLVMTypeRef *ElementTypes,
-                           unsigned ElementCount, int Packed) {
+                           unsigned ElementCount, LLVMBool Packed) {
   return LLVMStructTypeInContext(LLVMGetGlobalContext(), ElementTypes,
                                  ElementCount, Packed);
 }
@@ -294,7 +294,7 @@
     *Dest++ = wrap(*I);
 }
 
-int LLVMIsPackedStruct(LLVMTypeRef StructTy) {
+LLVMBool LLVMIsPackedStruct(LLVMTypeRef StructTy) {
   return unwrap<StructType>(StructTy)->isPacked();
 }
 
@@ -442,17 +442,17 @@
   return wrap(UndefValue::get(unwrap(Ty)));
 }
 
-int LLVMIsConstant(LLVMValueRef Ty) {
+LLVMBool LLVMIsConstant(LLVMValueRef Ty) {
   return isa<Constant>(unwrap(Ty));
 }
 
-int LLVMIsNull(LLVMValueRef Val) {
+LLVMBool LLVMIsNull(LLVMValueRef Val) {
   if (Constant *C = dyn_cast<Constant>(unwrap(Val)))
     return C->isNullValue();
   return false;
 }
 
-int LLVMIsUndef(LLVMValueRef Val) {
+LLVMBool LLVMIsUndef(LLVMValueRef Val) {
   return isa<UndefValue>(unwrap(Val));
 }
 
@@ -464,7 +464,7 @@
 /*--.. Operations on scalar constants ......................................--*/
 
 LLVMValueRef LLVMConstInt(LLVMTypeRef IntTy, unsigned long long N,
-                          int SignExtend) {
+                          LLVMBool SignExtend) {
   return wrap(ConstantInt::get(unwrap<IntegerType>(IntTy), N, SignExtend != 0));
 }
 
@@ -504,7 +504,8 @@
 /*--.. Operations on composite constants ...................................--*/
 
 LLVMValueRef LLVMConstStringInContext(LLVMContextRef C, const char *Str,
-                                      unsigned Length, int DontNullTerminate) {
+                                      unsigned Length,
+                                      LLVMBool DontNullTerminate) {
   /* Inverted the sense of AddNull because ', 0)' is a
      better mnemonic for null termination than ', 1)'. */
   return wrap(ConstantArray::get(*unwrap(C), std::string(Str, Length),
@@ -512,14 +513,14 @@
 }
 LLVMValueRef LLVMConstStructInContext(LLVMContextRef C, 
                                       LLVMValueRef *ConstantVals,
-                                      unsigned Count, int Packed) {
+                                      unsigned Count, LLVMBool Packed) {
   return wrap(ConstantStruct::get(*unwrap(C),
                                   unwrap<Constant>(ConstantVals, Count),
                                   Count, Packed != 0));
 }
 
 LLVMValueRef LLVMConstString(const char *Str, unsigned Length,
-                             int DontNullTerminate) {
+                             LLVMBool DontNullTerminate) {
   return LLVMConstStringInContext(LLVMGetGlobalContext(), Str, Length,
                                   DontNullTerminate);
 }
@@ -530,7 +531,7 @@
                                  Length));
 }
 LLVMValueRef LLVMConstStruct(LLVMValueRef *ConstantVals, unsigned Count,
-                             int Packed) {
+                             LLVMBool Packed) {
   return LLVMConstStructInContext(LLVMGetGlobalContext(), ConstantVals, Count,
                                   Packed);
 }
@@ -820,7 +821,7 @@
 }
 
 LLVMValueRef LLVMConstIntCast(LLVMValueRef ConstantVal, LLVMTypeRef ToType,
-                              unsigned isSigned) {
+                              LLVMBool isSigned) {
   return wrap(ConstantExpr::getIntegerCast(
                                            unwrap<Constant>(ConstantVal),
                                            unwrap(ToType),
@@ -883,10 +884,11 @@
                                            IdxList, NumIdx));
 }
 
-LLVMValueRef LLVMConstInlineAsm(LLVMTypeRef Ty, const char *AsmString, 
-                                const char *Constraints, int HasSideEffects,
-                                int IsAlignStack) {
-  return wrap(InlineAsm::get(dyn_cast<FunctionType>(unwrap(Ty)), AsmString, 
+LLVMValueRef LLVMConstInlineAsm(LLVMTypeRef Ty, const char *AsmString,
+                                const char *Constraints,
+                                LLVMBool HasSideEffects,
+                                LLVMBool IsAlignStack) {
+  return wrap(InlineAsm::get(dyn_cast<FunctionType>(unwrap(Ty)), AsmString,
                              Constraints, HasSideEffects, IsAlignStack));
 }
 
@@ -896,7 +898,7 @@
   return wrap(unwrap<GlobalValue>(Global)->getParent());
 }
 
-int LLVMIsDeclaration(LLVMValueRef Global) {
+LLVMBool LLVMIsDeclaration(LLVMValueRef Global) {
   return unwrap<GlobalValue>(Global)->isDeclaration();
 }
 
@@ -1079,19 +1081,19 @@
     ->setInitializer(unwrap<Constant>(ConstantVal));
 }
 
-int LLVMIsThreadLocal(LLVMValueRef GlobalVar) {
+LLVMBool LLVMIsThreadLocal(LLVMValueRef GlobalVar) {
   return unwrap<GlobalVariable>(GlobalVar)->isThreadLocal();
 }
 
-void LLVMSetThreadLocal(LLVMValueRef GlobalVar, int IsThreadLocal) {
+void LLVMSetThreadLocal(LLVMValueRef GlobalVar, LLVMBool IsThreadLocal) {
   unwrap<GlobalVariable>(GlobalVar)->setThreadLocal(IsThreadLocal != 0);
 }
 
-int LLVMIsGlobalConstant(LLVMValueRef GlobalVar) {
+LLVMBool LLVMIsGlobalConstant(LLVMValueRef GlobalVar) {
   return unwrap<GlobalVariable>(GlobalVar)->isConstant();
 }
 
-void LLVMSetGlobalConstant(LLVMValueRef GlobalVar, int IsConstant) {
+void LLVMSetGlobalConstant(LLVMValueRef GlobalVar, LLVMBool IsConstant) {
   unwrap<GlobalVariable>(GlobalVar)->setConstant(IsConstant != 0);
 }
 
@@ -1285,7 +1287,7 @@
   return wrap(static_cast<Value*>(unwrap(BB)));
 }
 
-int LLVMValueIsBasicBlock(LLVMValueRef Val) {
+LLVMBool LLVMValueIsBasicBlock(LLVMValueRef Val) {
   return isa<BasicBlock>(unwrap(Val));
 }
 
@@ -1452,11 +1454,11 @@
 
 /*--.. Operations on call instructions (only) ..............................--*/
 
-int LLVMIsTailCall(LLVMValueRef Call) {
+LLVMBool LLVMIsTailCall(LLVMValueRef Call) {
   return unwrap<CallInst>(Call)->isTailCall();
 }
 
-void LLVMSetTailCall(LLVMValueRef Call, int isTailCall) {
+void LLVMSetTailCall(LLVMValueRef Call, LLVMBool isTailCall) {
   unwrap<CallInst>(Call)->setTailCall(isTailCall);
 }
 
@@ -1973,9 +1975,11 @@
 
 /*===-- Memory buffers ----------------------------------------------------===*/
 
-int LLVMCreateMemoryBufferWithContentsOfFile(const char *Path,
-                                             LLVMMemoryBufferRef *OutMemBuf,
-                                             char **OutMessage) {
+LLVMBool LLVMCreateMemoryBufferWithContentsOfFile(
+    const char *Path,
+    LLVMMemoryBufferRef *OutMemBuf,
+    char **OutMessage) {
+
   std::string Error;
   if (MemoryBuffer *MB = MemoryBuffer::getFile(Path, &Error)) {
     *OutMemBuf = wrap(MB);
@@ -1986,8 +1990,8 @@
   return 1;
 }
 
-int LLVMCreateMemoryBufferWithSTDIN(LLVMMemoryBufferRef *OutMemBuf,
-                                    char **OutMessage) {
+LLVMBool LLVMCreateMemoryBufferWithSTDIN(LLVMMemoryBufferRef *OutMemBuf,
+                                         char **OutMessage) {
   MemoryBuffer *MB = MemoryBuffer::getSTDIN();
   if (!MB->getBufferSize()) {
     delete MB;
diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index 1d461c3..b37b2ae 100644
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -1699,19 +1699,19 @@
   return wrap(new FunctionPassManager(unwrap(P)));
 }
 
-int LLVMRunPassManager(LLVMPassManagerRef PM, LLVMModuleRef M) {
+LLVMBool LLVMRunPassManager(LLVMPassManagerRef PM, LLVMModuleRef M) {
   return unwrap<PassManager>(PM)->run(*unwrap(M));
 }
 
-int LLVMInitializeFunctionPassManager(LLVMPassManagerRef FPM) {
+LLVMBool LLVMInitializeFunctionPassManager(LLVMPassManagerRef FPM) {
   return unwrap<FunctionPassManager>(FPM)->doInitialization();
 }
 
-int LLVMRunFunctionPassManager(LLVMPassManagerRef FPM, LLVMValueRef F) {
+LLVMBool LLVMRunFunctionPassManager(LLVMPassManagerRef FPM, LLVMValueRef F) {
   return unwrap<FunctionPassManager>(FPM)->run(*unwrap<Function>(F));
 }
 
-int LLVMFinalizeFunctionPassManager(LLVMPassManagerRef FPM) {
+LLVMBool LLVMFinalizeFunctionPassManager(LLVMPassManagerRef FPM) {
   return unwrap<FunctionPassManager>(FPM)->doFinalization();
 }