[GC] Consolidate all built in GCs into a single file [NFC]

Combine a bunch of small files into a single, still rather small, file.  The primary purpose of this is to get all of the static initializers into a single file so as to have a well defined order of initialization.  

llvm-svn: 258109

1 files changed, 0 insertions, 55 deletions

diff --git a/llvm/lib/CodeGen/ShadowStackGC.cpp b/llvm/lib/CodeGen/ShadowStackGC.cpp
deleted file mode 100644
index b12e943eb35..00000000000
--- a/llvm/lib/CodeGen/ShadowStackGC.cpp
+++ /dev/null
@@ -1,55 +0,0 @@
-//===-- ShadowStackGC.cpp - GC support for uncooperative targets ----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements lowering for the llvm.gc* intrinsics for targets that do
-// not natively support them (which includes the C backend). Note that the code
-// generated is not quite as efficient as algorithms which generate stack maps
-// to identify roots.
-//
-// This pass implements the code transformation described in this paper:
-//   "Accurate Garbage Collection in an Uncooperative Environment"
-//   Fergus Henderson, ISMM, 2002
-//
-// In runtime/GC/SemiSpace.cpp is a prototype runtime which is compatible with
-// ShadowStackGC.
-//
-// In order to support this particular transformation, all stack roots are
-// coallocated in the stack. This allows a fully target-independent stack map
-// while introducing only minor runtime overhead.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/GCs.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/CodeGen/GCStrategy.h"
-#include "llvm/IR/CallSite.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "shadowstackgc"
-
-namespace {
-class ShadowStackGC : public GCStrategy {
-public:
-  ShadowStackGC();
-};
-}
-
-static GCRegistry::Add<ShadowStackGC>
-    X("shadow-stack", "Very portable GC for uncooperative code generators");
-
-void llvm::linkShadowStackGC() {}
-
-ShadowStackGC::ShadowStackGC() {
-  InitRoots = true;
-  CustomRoots = true;
-}