1 files changed, 46 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/LinkAllCodegenComponents.h b/include/llvm/CodeGen/LinkAllCodegenComponents.h
new file mode 100644
index 0000000000..82b5da9f0b
--- /dev/null
+++ b/include/llvm/CodeGen/LinkAllCodegenComponents.h
@@ -0,0 +1,46 @@
+//===- llvm/Codegen/LinkAllCodegenComponents.h ------------------*- C++ -*-===//
+//
+//                      The LLVM Compiler Infrastructure
+//
+// This file was developed by James M. Laskey and 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/Passes.h"
+#include "llvm/CodeGen/ScheduleDAG.h"
+
+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::createSimpleRegisterAllocator();
+      (void) llvm::createLocalRegisterAllocator();
+      (void) llvm::createLinearScanRegisterAllocator();
+      
+      (void) llvm::createBFS_DAGScheduler(NULL, NULL);
+      (void) llvm::createSimpleDAGScheduler(NULL, NULL);
+      (void) llvm::createNoItinsDAGScheduler(NULL, NULL);
+      (void) llvm::createBURRListDAGScheduler(NULL, NULL);
+      (void) llvm::createTDRRListDAGScheduler(NULL, NULL);
+      (void) llvm::createTDListDAGScheduler(NULL, NULL);
+
+    }
+  } ForceCodegenLinking; // Force link by creating a global definition.
+}
+
+#endif
+\ No newline at end of file