Add a utility header that makes it easy to link in the right set

of targets for various purposes.

llvm-svn: 73610

llvm/include/llvm/Target/TargetSelect.h

@@ -0,0 +1,65 @@
+//===- TargetSelect.h - Target Selection & Registration -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides utilities to make sure that certain classes of targets are
+// linked into the main application executable, and initialize them as
+// appropriate.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_TARGETSELECT_H
+#define LLVM_TARGET_TARGETSELECT_H
+
+#include "llvm/Config/config.h"
+
+namespace llvm {
+  // Declare all of the target-initialization functions that are available.
+#define LLVM_TARGET(TargetName) void Initialize##TargetName##Target();
+#include "llvm/Config/Targets.def"
+  
+  // Declare all of the available asm-printer initialization functions.
+  // Declare all of the target-initialization functions.
+#define LLVM_ASM_PRINTER(TargetName) void Initialize##TargetName##AsmPrinter();
+#include "llvm/Config/AsmPrinters.def"
+  
+  /// InitializeAllTargets - The main program should call this function if it
+  /// wants to link in all available targets that LLVM is configured to support.
+  inline void InitializeAllTargets() {
+#define LLVM_TARGET(TargetName) llvm::Initialize##TargetName##Target();
+#include "llvm/Config/Targets.def"
+  }
+  
+  /// InitializeAllAsmPrinters - The main program should call this function if
+  /// it wants all asm printers that LLVM is configured to support.  This will
+  /// cause them to be linked into its executable.
+  inline void InitializeAllAsmPrinters() {
+#define LLVM_ASM_PRINTER(TargetName) Initialize##TargetName##AsmPrinter();
+#include "llvm/Config/AsmPrinters.def"
+  }
+  
+  
+  /// InitializeNativeTarget - 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.
+  inline bool InitializeNativeTarget() {
+  // If we have a native target, initialize it to ensure it is linked in.
+#ifdef LLVM_NATIVE_ARCH
+#define DoInit2(TARG, MOD)   llvm::Initialize ## TARG ## MOD()
+#define DoInit(T, M) DoInit2(T, M)
+    DoInit(LLVM_NATIVE_ARCH, Target);
+    return false;
+#undef DoInit
+#undef DoInit2
+#else
+    return true;
+#endif
+  }  
+}
+
+#endif