[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, 54 deletions

diff --git a/llvm/lib/CodeGen/CoreCLRGC.cpp b/llvm/lib/CodeGen/CoreCLRGC.cpp
deleted file mode 100644
index ff7c0d5dc0a..00000000000
--- a/llvm/lib/CodeGen/CoreCLRGC.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-//===-- CoreCLRGC.cpp - CoreCLR Runtime GC Strategy -----------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains a GCStrategy for the CoreCLR Runtime.
-// The strategy is similar to Statepoint-example GC, but differs from it in
-// certain aspects, such as:
-// 1) Base-pointers need not be explicitly tracked and reported for
-//    interior pointers
-// 2) Uses a different format for encoding stack-maps
-// 3) Location of Safe-point polls: polls are only needed before loop-back edges
-//    and before tail-calls (not needed at function-entry)
-//
-// The above differences in behavior are to be implemented in upcoming checkins.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/GCStrategy.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Value.h"
-
-using namespace llvm;
-
-namespace {
-class CoreCLRGC : public GCStrategy {
-public:
-  CoreCLRGC() {
-    UseStatepoints = true;
-    // These options are all gc.root specific, we specify them so that the
-    // gc.root lowering code doesn't run.
-    InitRoots = false;
-    NeededSafePoints = 0;
-    UsesMetadata = false;
-    CustomRoots = false;
-  }
-  Optional<bool> isGCManagedPointer(const Type *Ty) const override {
-    // Method is only valid on pointer typed values.
-    const PointerType *PT = cast<PointerType>(Ty);
-    // We pick addrspace(1) as our GC managed heap.
-    return (1 == PT->getAddressSpace());
-  }
-};
-}
-
-static GCRegistry::Add<CoreCLRGC> X("coreclr", "CoreCLR-compatible GC");
-
-namespace llvm {
-void linkCoreCLRGC() {}
-}