Index: bindings/go/llvm/analysis.go
===================================================================
--- bindings/go/llvm/analysis.go
+++ bindings/go/llvm/analysis.go
@@ -15,6 +15,7 @@
 
 /*
 #include "llvm-c/Analysis.h" // If you are getting an error here read bindings/go/README.txt
+#include "llvm-c/Core.h"
 #include <stdlib.h>
 */
 import "C"
Index: bindings/go/llvm/bitreader.go
===================================================================
--- bindings/go/llvm/bitreader.go
+++ bindings/go/llvm/bitreader.go
@@ -15,6 +15,7 @@
 
 /*
 #include "llvm-c/BitReader.h"
+#include "llvm-c/Core.h"
 #include <stdlib.h>
 */
 import "C"
Index: bindings/go/llvm/executionengine.go
===================================================================
--- bindings/go/llvm/executionengine.go
+++ bindings/go/llvm/executionengine.go
@@ -14,6 +14,7 @@
 package llvm
 
 /*
+#include "llvm-c/Core.h"
 #include "llvm-c/ExecutionEngine.h"
 #include <stdlib.h>
 */
Index: bindings/go/llvm/linker.go
===================================================================
--- bindings/go/llvm/linker.go
+++ bindings/go/llvm/linker.go
@@ -14,6 +14,7 @@
 package llvm
 
 /*
+#include "llvm-c/Core.h"
 #include "llvm-c/Linker.h"
 #include <stdlib.h>
 */
Index: bindings/go/llvm/target.go
===================================================================
--- bindings/go/llvm/target.go
+++ bindings/go/llvm/target.go
@@ -14,6 +14,7 @@
 package llvm
 
 /*
+#include "llvm-c/Core.h"
 #include "llvm-c/Target.h"
 #include "llvm-c/TargetMachine.h"
 #include <stdlib.h>
Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -41,6 +41,12 @@
   in the 3.9 release. Please migrate to using CMake. For more information see:
   `Building LLVM with CMake <CMake.html>`_
 
+* With this release, the C API headers have been reorganized to improve build
+  time. Various typedef moved to Type.h so most of the LLVM codebase can depend
+  on it rather than the whole C API. Nothing should change for projects
+  including the headers directly, but this may affect code that included
+  headers transitively.
+
 .. NOTE
    For small 1-3 sentence descriptions, just add an entry at the end of
    this list. If your description won't fit comfortably in one bullet
Index: include/llvm-c/Analysis.h
===================================================================
--- include/llvm-c/Analysis.h
+++ include/llvm-c/Analysis.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_ANALYSIS_H
 #define LLVM_C_ANALYSIS_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/BitReader.h
===================================================================
--- include/llvm-c/BitReader.h
+++ include/llvm-c/BitReader.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_BITREADER_H
 #define LLVM_C_BITREADER_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/BitWriter.h
===================================================================
--- include/llvm-c/BitWriter.h
+++ include/llvm-c/BitWriter.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_BITWRITER_H
 #define LLVM_C_BITWRITER_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/Core.h
===================================================================
--- include/llvm-c/Core.h
+++ include/llvm-c/Core.h
@@ -15,7 +15,8 @@
 #ifndef LLVM_C_CORE_H
 #define LLVM_C_CORE_H
 
-#include "llvm-c/Support.h"
+#include "llvm-c/ErrorHandling.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -40,15 +41,6 @@
  * the LLVM intermediate representation as well as other related types
  * and utilities.
  *
- * LLVM uses a polymorphic type hierarchy which C cannot represent, therefore
- * parameters must be passed as base types. Despite the declared types, most
- * of the functions provided operate only on branches of the type hierarchy.
- * The declared parameter names are descriptive and specify which type is
- * required. Additionally, each type hierarchy is documented along with the
- * functions that operate upon it. For more detail, refer to LLVM's C++ code.
- * If in doubt, refer to Core.cpp, which performs parameter downcasts in the
- * form unwrap<RequiredType>(Param).
- *
  * 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.
@@ -62,74 +54,6 @@
  * @{
  */
 
-/* Opaque types. */
-
-/**
- * The top-level container for all LLVM global data. See the LLVMContext class.
- */
-typedef struct LLVMOpaqueContext *LLVMContextRef;
-
-/**
- * The top-level container for all other LLVM Intermediate Representation (IR)
- * objects.
- *
- * @see llvm::Module
- */
-typedef struct LLVMOpaqueModule *LLVMModuleRef;
-
-/**
- * Each value in the LLVM IR has a type, an LLVMTypeRef.
- *
- * @see llvm::Type
- */
-typedef struct LLVMOpaqueType *LLVMTypeRef;
-
-/**
- * Represents an individual value in LLVM IR.
- *
- * This models llvm::Value.
- */
-typedef struct LLVMOpaqueValue *LLVMValueRef;
-
-/**
- * Represents a basic block of instructions in LLVM IR.
- *
- * This models llvm::BasicBlock.
- */
-typedef struct LLVMOpaqueBasicBlock *LLVMBasicBlockRef;
-
-/**
- * Represents an LLVM basic block builder.
- *
- * This models llvm::IRBuilder.
- */
-typedef struct LLVMOpaqueBuilder *LLVMBuilderRef;
-
-/**
- * Interface used to provide a module to JIT or interpreter.
- * This is now just a synonym for llvm::Module, but we have to keep using the
- * different type to keep binary compatibility.
- */
-typedef struct LLVMOpaqueModuleProvider *LLVMModuleProviderRef;
-
-/** @see llvm::PassManagerBase */
-typedef struct LLVMOpaquePassManager *LLVMPassManagerRef;
-
-/** @see llvm::PassRegistry */
-typedef struct LLVMOpaquePassRegistry *LLVMPassRegistryRef;
-
-/**
- * Used to get the users and usees of a Value.
- *
- * @see llvm::Use */
-typedef struct LLVMOpaqueUse *LLVMUseRef;
-
-
-/**
- * @see llvm::DiagnosticInfo
- */
-typedef struct LLVMOpaqueDiagnosticInfo *LLVMDiagnosticInfoRef;
-
 typedef enum {
     LLVMZExtAttribute       = 1<<0,
     LLVMSExtAttribute       = 1<<1,
@@ -438,30 +362,6 @@
 char *LLVMCreateMessage(const char *Message);
 void LLVMDisposeMessage(char *Message);
 
-typedef void (*LLVMFatalErrorHandler)(const char *Reason);
-
-/**
- * Install a fatal error handler. By default, if LLVM detects a fatal error, it
- * will call exit(1). This may not be appropriate in many contexts. For example,
- * doing exit(1) will bypass many crash reporting/tracing system tools. This
- * function allows you to install a callback that will be invoked prior to the
- * call to exit(1).
- */
-void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler);
-
-/**
- * Reset the fatal error handler. This resets LLVM's fatal error handling
- * behavior to the default.
- */
-void LLVMResetFatalErrorHandler(void);
-
-/**
- * Enable LLVM's built-in stack trace code. This intercepts the OS's crash
- * signals and prints which component of LLVM you were in at the time if the
- * crash.
- */
-void LLVMEnablePrettyStackTrace(void);
-
 /**
  * @defgroup LLVMCCoreContext Contexts
  *
@@ -2438,7 +2338,7 @@
  *
  * @see llvm::Instruction::getOpCode()
  */
-LLVMOpcode   LLVMGetInstructionOpcode(LLVMValueRef Inst);
+LLVMOpcode LLVMGetInstructionOpcode(LLVMValueRef Inst);
 
 /**
  * Obtain the predicate of an instruction.
Index: include/llvm-c/ErrorHandling.h
===================================================================
--- /dev/null
+++ include/llvm-c/ErrorHandling.h
@@ -0,0 +1,51 @@
+/*===-- llvm-c/Support.h - Support C Interface --------------------*- C -*-===*\
+|*                                                                            *|
+|*                     The LLVM Compiler Infrastructure                       *|
+|*                                                                            *|
+|* This file is distributed under the University of Illinois Open Source      *|
+|* License. See LICENSE.TXT for details.                                      *|
+|*                                                                            *|
+|*===----------------------------------------------------------------------===*|
+|*                                                                            *|
+|* This file defines the C interface to the LLVM support library.             *|
+|*                                                                            *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_C_ERROR_HANDLING_H
+#define LLVM_C_ERROR_HANDLING_H
+
+#include "llvm-c/Types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*LLVMFatalErrorHandler)(const char *Reason);
+
+/**
+ * Install a fatal error handler. By default, if LLVM detects a fatal error, it
+ * will call exit(1). This may not be appropriate in many contexts. For example,
+ * doing exit(1) will bypass many crash reporting/tracing system tools. This
+ * function allows you to install a callback that will be invoked prior to the
+ * call to exit(1).
+ */
+void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler);
+
+/**
+ * Reset the fatal error handler. This resets LLVM's fatal error handling
+ * behavior to the default.
+ */
+void LLVMResetFatalErrorHandler(void);
+
+/**
+ * Enable LLVM's built-in stack trace code. This intercepts the OS's crash
+ * signals and prints which component of LLVM you were in at the time if the
+ * crash.
+ */
+void LLVMEnablePrettyStackTrace(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
Index: include/llvm-c/ExecutionEngine.h
===================================================================
--- include/llvm-c/ExecutionEngine.h
+++ include/llvm-c/ExecutionEngine.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_EXECUTIONENGINE_H
 #define LLVM_C_EXECUTIONENGINE_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 #include "llvm-c/Target.h"
 #include "llvm-c/TargetMachine.h"
 
Index: include/llvm-c/IRReader.h
===================================================================
--- include/llvm-c/IRReader.h
+++ include/llvm-c/IRReader.h
@@ -14,7 +14,7 @@
 #ifndef LLVM_C_IRREADER_H
 #define LLVM_C_IRREADER_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/Initialization.h
===================================================================
--- include/llvm-c/Initialization.h
+++ include/llvm-c/Initialization.h
@@ -16,7 +16,7 @@
 #ifndef LLVM_C_INITIALIZATION_H
 #define LLVM_C_INITIALIZATION_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/Linker.h
===================================================================
--- include/llvm-c/Linker.h
+++ include/llvm-c/Linker.h
@@ -14,7 +14,7 @@
 #ifndef LLVM_C_LINKER_H
 #define LLVM_C_LINKER_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/Object.h
===================================================================
--- include/llvm-c/Object.h
+++ include/llvm-c/Object.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_OBJECT_H
 #define LLVM_C_OBJECT_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 #include "llvm/Config/llvm-config.h"
 
 #ifdef __cplusplus
Index: include/llvm-c/Support.h
===================================================================
--- include/llvm-c/Support.h
+++ include/llvm-c/Support.h
@@ -15,31 +15,13 @@
 #define LLVM_C_SUPPORT_H
 
 #include "llvm/Support/DataTypes.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /**
- * @defgroup LLVMCSupportTypes Types and Enumerations
- *
- * @{
- */
-
-typedef int LLVMBool;
-
-/**
- * Used to pass regions of memory through LLVM interfaces.
- *
- * @see llvm::MemoryBuffer
- */
-typedef struct LLVMOpaqueMemoryBuffer *LLVMMemoryBufferRef;
-
-/**
- * @}
- */
-
-/**
  * This function permanently loads the dynamic library at the given path.
  * It is safe to call this function multiple times for the same library.
  *
Index: include/llvm-c/Target.h
===================================================================
--- include/llvm-c/Target.h
+++ include/llvm-c/Target.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_TARGET_H
 #define LLVM_C_TARGET_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 #include "llvm/Config/llvm-config.h"
 
 #if defined(_MSC_VER) && !defined(inline)
Index: include/llvm-c/TargetMachine.h
===================================================================
--- include/llvm-c/TargetMachine.h
+++ include/llvm-c/TargetMachine.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_TARGETMACHINE_H
 #define LLVM_C_TARGETMACHINE_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 #include "llvm-c/Target.h"
 
 #ifdef __cplusplus
Index: include/llvm-c/Transforms/IPO.h
===================================================================
--- include/llvm-c/Transforms/IPO.h
+++ include/llvm-c/Transforms/IPO.h
@@ -15,7 +15,7 @@
 #ifndef LLVM_C_TRANSFORMS_IPO_H
 #define LLVM_C_TRANSFORMS_IPO_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/Transforms/PassManagerBuilder.h
===================================================================
--- include/llvm-c/Transforms/PassManagerBuilder.h
+++ include/llvm-c/Transforms/PassManagerBuilder.h
@@ -14,7 +14,7 @@
 #ifndef LLVM_C_TRANSFORMS_PASSMANAGERBUILDER_H
 #define LLVM_C_TRANSFORMS_PASSMANAGERBUILDER_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 typedef struct LLVMOpaquePassManagerBuilder *LLVMPassManagerBuilderRef;
 
Index: include/llvm-c/Transforms/Scalar.h
===================================================================
--- include/llvm-c/Transforms/Scalar.h
+++ include/llvm-c/Transforms/Scalar.h
@@ -19,7 +19,7 @@
 #ifndef LLVM_C_TRANSFORMS_SCALAR_H
 #define LLVM_C_TRANSFORMS_SCALAR_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
Index: include/llvm-c/Transforms/Vectorize.h
===================================================================
--- include/llvm-c/Transforms/Vectorize.h
+++ include/llvm-c/Transforms/Vectorize.h
@@ -20,7 +20,7 @@
 #ifndef LLVM_C_TRANSFORMS_VECTORIZE_H
 #define LLVM_C_TRANSFORMS_VECTORIZE_H
 
-#include "llvm-c/Core.h"
+#include "llvm-c/Types.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -51,4 +51,3 @@
 #endif /* defined(__cplusplus) */
 
 #endif
-
Index: include/llvm-c/Types.h
===================================================================
--- /dev/null
+++ include/llvm-c/Types.h
@@ -0,0 +1,124 @@
+/*===-- llvm-c/Support.h - Support C Interface --------------------*- C -*-===*\
+|*                                                                            *|
+|*                     The LLVM Compiler Infrastructure                       *|
+|*                                                                            *|
+|* This file is distributed under the University of Illinois Open Source      *|
+|* License. See LICENSE.TXT for details.                                      *|
+|*                                                                            *|
+|*===----------------------------------------------------------------------===*|
+|*                                                                            *|
+|* This file defines the C interface to the LLVM support library.             *|
+|*                                                                            *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_C_TYPES_H
+#define LLVM_C_TYPES_H
+
+#include "llvm/Support/DataTypes.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup LLVMCSupportTypes Types and Enumerations
+ *
+ * @{
+ */
+
+typedef int LLVMBool;
+
+/* Opaque types. */
+
+/**
+ * LLVM uses a polymorphic type hierarchy which C cannot represent, therefore
+ * parameters must be passed as base types. Despite the declared types, most
+ * of the functions provided operate only on branches of the type hierarchy.
+ * The declared parameter names are descriptive and specify which type is
+ * required. Additionally, each type hierarchy is documented along with the
+ * functions that operate upon it. For more detail, refer to LLVM's C++ code.
+ * If in doubt, refer to Core.cpp, which performs parameter downcasts in the
+ * form unwrap<RequiredType>(Param).
+ */
+
+/**
+ * Used to pass regions of memory through LLVM interfaces.
+ *
+ * @see llvm::MemoryBuffer
+ */
+typedef struct LLVMOpaqueMemoryBuffer *LLVMMemoryBufferRef;
+
+/**
+ * The top-level container for all LLVM global data. See the LLVMContext class.
+ */
+typedef struct LLVMOpaqueContext *LLVMContextRef;
+
+/**
+ * The top-level container for all other LLVM Intermediate Representation (IR)
+ * objects.
+ *
+ * @see llvm::Module
+ */
+typedef struct LLVMOpaqueModule *LLVMModuleRef;
+
+/**
+ * Each value in the LLVM IR has a type, an LLVMTypeRef.
+ *
+ * @see llvm::Type
+ */
+typedef struct LLVMOpaqueType *LLVMTypeRef;
+
+/**
+ * Represents an individual value in LLVM IR.
+ *
+ * This models llvm::Value.
+ */
+typedef struct LLVMOpaqueValue *LLVMValueRef;
+
+/**
+ * Represents a basic block of instructions in LLVM IR.
+ *
+ * This models llvm::BasicBlock.
+ */
+typedef struct LLVMOpaqueBasicBlock *LLVMBasicBlockRef;
+
+/**
+ * Represents an LLVM basic block builder.
+ *
+ * This models llvm::IRBuilder.
+ */
+typedef struct LLVMOpaqueBuilder *LLVMBuilderRef;
+
+/**
+ * Interface used to provide a module to JIT or interpreter.
+ * This is now just a synonym for llvm::Module, but we have to keep using the
+ * different type to keep binary compatibility.
+ */
+typedef struct LLVMOpaqueModuleProvider *LLVMModuleProviderRef;
+
+/** @see llvm::PassManagerBase */
+typedef struct LLVMOpaquePassManager *LLVMPassManagerRef;
+
+/** @see llvm::PassRegistry */
+typedef struct LLVMOpaquePassRegistry *LLVMPassRegistryRef;
+
+/**
+ * Used to get the users and usees of a Value.
+ *
+ * @see llvm::Use */
+typedef struct LLVMOpaqueUse *LLVMUseRef;
+
+/**
+ * @see llvm::DiagnosticInfo
+ */
+typedef struct LLVMOpaqueDiagnosticInfo *LLVMDiagnosticInfoRef;
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
Index: include/llvm/IR/DiagnosticInfo.h
===================================================================
--- include/llvm/IR/DiagnosticInfo.h
+++ include/llvm/IR/DiagnosticInfo.h
@@ -15,7 +15,6 @@
 #ifndef LLVM_IR_DIAGNOSTICINFO_H
 #define LLVM_IR_DIAGNOSTICINFO_H
 
-#include "llvm-c/Core.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/IR/DebugLoc.h"
 #include "llvm/IR/Module.h"
Index: include/llvm/IR/LLVMContext.h
===================================================================
--- include/llvm/IR/LLVMContext.h
+++ include/llvm/IR/LLVMContext.h
@@ -15,7 +15,6 @@
 #ifndef LLVM_IR_LLVMCONTEXT_H
 #define LLVM_IR_LLVMCONTEXT_H
 
-#include "llvm-c/Core.h"
 #include "llvm/Support/CBindingWrapping.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/Options.h"
Index: include/llvm/IR/Type.h
===================================================================
--- include/llvm/IR/Type.h
+++ include/llvm/IR/Type.h
@@ -15,7 +15,6 @@
 #ifndef LLVM_IR_TYPE_H
 #define LLVM_IR_TYPE_H
 
-#include "llvm-c/Core.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/Support/CBindingWrapping.h"
Index: include/llvm/IR/Use.h
===================================================================
--- include/llvm/IR/Use.h
+++ include/llvm/IR/Use.h
@@ -25,7 +25,6 @@
 #ifndef LLVM_IR_USE_H
 #define LLVM_IR_USE_H
 
-#include "llvm-c/Core.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/Support/CBindingWrapping.h"
 #include "llvm/Support/Compiler.h"
Index: include/llvm/IR/Value.h
===================================================================
--- include/llvm/IR/Value.h
+++ include/llvm/IR/Value.h
@@ -14,7 +14,6 @@
 #ifndef LLVM_IR_VALUE_H
 #define LLVM_IR_VALUE_H
 
-#include "llvm-c/Core.h"
 #include "llvm/ADT/iterator_range.h"
 #include "llvm/IR/Use.h"
 #include "llvm/Support/CBindingWrapping.h"
Index: include/llvm/PassRegistry.h
===================================================================
--- include/llvm/PassRegistry.h
+++ include/llvm/PassRegistry.h
@@ -17,7 +17,6 @@
 #ifndef LLVM_PASSREGISTRY_H
 #define LLVM_PASSREGISTRY_H
 
-#include "llvm-c/Core.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/StringMap.h"
Index: include/llvm/Support/CBindingWrapping.h
===================================================================
--- include/llvm/Support/CBindingWrapping.h
+++ include/llvm/Support/CBindingWrapping.h
@@ -15,6 +15,7 @@
 #define LLVM_SUPPORT_CBINDINGWRAPPING_H
 
 #include "llvm/Support/Casting.h"
+#include "llvm-c/Types.h"
 
 #define DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref)     \
   inline ty *unwrap(ref P) {                            \
Index: include/llvm/Support/MemoryBuffer.h
===================================================================
--- include/llvm/Support/MemoryBuffer.h
+++ include/llvm/Support/MemoryBuffer.h
@@ -14,7 +14,6 @@
 #ifndef LLVM_SUPPORT_MEMORYBUFFER_H
 #define LLVM_SUPPORT_MEMORYBUFFER_H
 
-#include "llvm-c/Support.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/CBindingWrapping.h"
 #include "llvm/Support/DataTypes.h"
Index: lib/Bitcode/Reader/BitReader.cpp
===================================================================
--- lib/Bitcode/Reader/BitReader.cpp
+++ lib/Bitcode/Reader/BitReader.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm-c/BitReader.h"
+#include "llvm-c/Core.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/LLVMContext.h"
Index: lib/Support/ErrorHandling.cpp
===================================================================
--- lib/Support/ErrorHandling.cpp
+++ lib/Support/ErrorHandling.cpp
@@ -13,7 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm-c/Core.h"
+#include "llvm-c/ErrorHandling.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Config/config.h"
Index: lib/Support/PrettyStackTrace.cpp
===================================================================
--- lib/Support/PrettyStackTrace.cpp
+++ lib/Support/PrettyStackTrace.cpp
@@ -13,7 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/PrettyStackTrace.h"
-#include "llvm-c/Core.h"
+#include "llvm-c/ErrorHandling.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Config/config.h"     // Get autoconf configuration settings
 #include "llvm/Support/Compiler.h"
Index: tools/llvm-c-test/object.c
===================================================================
--- tools/llvm-c-test/object.c
+++ tools/llvm-c-test/object.c
@@ -13,6 +13,7 @@
 \*===----------------------------------------------------------------------===*/
 
 #include "llvm-c-test.h"
+#include "llvm-c/Core.h"
 #include "llvm-c/Object.h"
 #include <stdio.h>
 #include <stdlib.h>
Index: unittests/ExecutionEngine/Orc/OrcCAPITest.cpp
===================================================================
--- unittests/ExecutionEngine/Orc/OrcCAPITest.cpp
+++ unittests/ExecutionEngine/Orc/OrcCAPITest.cpp
@@ -9,6 +9,7 @@
 
 #include "OrcTestCommon.h"
 #include "gtest/gtest.h"
+#include "llvm-c/Core.h"
 #include "llvm-c/OrcBindings.h"
 #include "llvm-c/Target.h"
 #include "llvm-c/TargetMachine.h"
Index: unittests/IR/ConstantsTest.cpp
===================================================================
--- unittests/IR/ConstantsTest.cpp
+++ unittests/IR/ConstantsTest.cpp
@@ -15,6 +15,7 @@
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/SourceMgr.h"
+#include "llvm-c/Core.h"
 #include "gtest/gtest.h"
 
 namespace llvm {
Index: unittests/Linker/LinkModulesTest.cpp
===================================================================
--- unittests/Linker/LinkModulesTest.cpp
+++ unittests/Linker/LinkModulesTest.cpp
@@ -16,6 +16,7 @@
 #include "llvm/IR/Module.h"
 #include "llvm/Linker/Linker.h"
 #include "llvm/Support/SourceMgr.h"
+#include "llvm-c/Core.h"
 #include "llvm-c/Linker.h"
 #include "gtest/gtest.h"