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thirdparty/clang/include/llvm/CodeGen/LinkAllCodegenComponents.h

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+//===- llvm/Codegen/LinkAllCodegenComponents.h ------------------*- C++ -*-===//
+//
+//                      The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header file pulls in all codegen related passes for tools like lli and
+// llc that need this functionality.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
+#define LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
+
+#include "llvm/CodeGen/GCs.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/SchedulerRegistry.h"
+#include "llvm/Target/TargetMachine.h"
+#include <cstdlib>
+
+namespace {
+  struct ForceCodegenLinking {
+    ForceCodegenLinking() {
+      // We must reference the passes in such a way that compilers will not
+      // delete it all as dead code, even with whole program optimization,
+      // yet is effectively a NO-OP. As the compiler isn't smart enough
+      // to know that getenv() never returns -1, this will do the job.
+      if (std::getenv("bar") != (char*) -1)
+        return;
+
+      (void) llvm::createFastRegisterAllocator();
+      (void) llvm::createBasicRegisterAllocator();
+      (void) llvm::createGreedyRegisterAllocator();
+      (void) llvm::createDefaultPBQPRegisterAllocator();
+
+      llvm::linkOcamlGC();
+      llvm::linkErlangGC();
+      llvm::linkShadowStackGC();
+
+      (void) llvm::createBURRListDAGScheduler(NULL, llvm::CodeGenOpt::Default);
+      (void) llvm::createSourceListDAGScheduler(NULL,llvm::CodeGenOpt::Default);
+      (void) llvm::createHybridListDAGScheduler(NULL,llvm::CodeGenOpt::Default);
+      (void) llvm::createFastDAGScheduler(NULL, llvm::CodeGenOpt::Default);
+      (void) llvm::createDefaultScheduler(NULL, llvm::CodeGenOpt::Default);
+      (void) llvm::createVLIWDAGScheduler(NULL, llvm::CodeGenOpt::Default);
+
+    }
+  } ForceCodegenLinking; // Force link by creating a global definition.
+}
+
+#endif