Factor GC metadata table assembly generation out of Collector in preparation for splitting AsmPrinter into its own library.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54881 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 178 deletions

diff --git a/lib/CodeGen/OcamlCollector.cpp b/lib/CodeGen/OcamlCollector.cpp
deleted file mode 100644
index 7f58f58c29..0000000000
--- a/lib/CodeGen/OcamlCollector.cpp
+++ /dev/null
@@ -1,178 +0,0 @@
-//===-- OcamlCollector.cpp - Ocaml frametable emitter ---------------------===//
-//
-//                     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 compatible with
-// Objective Caml 3.10.0, which uses a liveness-accurate static stack map.
-//
-//===----------------------------------------------------------------------===//
-                        
-#include "llvm/CodeGen/Collectors.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/Collector.h"
-#include "llvm/Module.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
-
-using namespace llvm;
-
-namespace {
-
-  class VISIBILITY_HIDDEN OcamlCollector : public Collector {
-  public:
-    OcamlCollector();
-  };
-
-  class VISIBILITY_HIDDEN OcamlGCMetadataPrinter : public GCMetadataPrinter {
-  public:
-    void beginAssembly(std::ostream &OS, AsmPrinter &AP,
-                       const TargetAsmInfo &TAI);
-    
-    void finishAssembly(std::ostream &OS, AsmPrinter &AP,
-                        const TargetAsmInfo &TAI);
-  };
-  
-}
-
-static CollectorRegistry::Add<OcamlCollector>
-X("ocaml", "ocaml 3.10-compatible collector");
-
-static GCMetadataPrinterRegistry::Add<OcamlGCMetadataPrinter>
-Y("ocaml", "ocaml 3.10-compatible collector");
-
-// -----------------------------------------------------------------------------
-
-static void EmitCamlGlobal(const Module &M, std::ostream &OS, AsmPrinter &AP,
-                           const TargetAsmInfo &TAI, const char *Id) {
-  const std::string &MId = M.getModuleIdentifier();
-  
-  std::string Mangled;
-  Mangled += TAI.getGlobalPrefix();
-  Mangled += "caml";
-  size_t Letter = Mangled.size();
-  Mangled.append(MId.begin(), std::find(MId.begin(), MId.end(), '.'));
-  Mangled += "__";
-  Mangled += Id;
-  
-  // Capitalize the first letter of the module name.
-  Mangled[Letter] = toupper(Mangled[Letter]);
-  
-  if (const char *GlobalDirective = TAI.getGlobalDirective())
-    OS << GlobalDirective << Mangled << "\n";
-  OS << Mangled << ":\n";
-}
-
-Collector *llvm::createOcamlCollector() {
-  return new OcamlCollector();
-}
-
-OcamlCollector::OcamlCollector() {
-  NeededSafePoints = 1 << GC::PostCall;
-  UsesMetadata = true;
-}
-
-void OcamlGCMetadataPrinter::beginAssembly(std::ostream &OS, AsmPrinter &AP,
-                                           const TargetAsmInfo &TAI) {
-  AP.SwitchToTextSection(TAI.getTextSection());
-  EmitCamlGlobal(getModule(), OS, AP, TAI, "code_begin");
-  
-  AP.SwitchToDataSection(TAI.getDataSection());
-  EmitCamlGlobal(getModule(), OS, AP, TAI, "data_begin");
-}
-
-/// emitAssembly - Print the frametable. The ocaml frametable format is thus:
-/// 
-///   extern "C" struct align(sizeof(intptr_t)) {
-///     uint16_t NumDescriptors;
-///     struct align(sizeof(intptr_t)) {
-///       void *ReturnAddress;
-///       uint16_t FrameSize;
-///       uint16_t NumLiveOffsets;
-///       uint16_t LiveOffsets[NumLiveOffsets];
-///     } Descriptors[NumDescriptors];
-///   } caml${module}__frametable;
-/// 
-/// Note that this precludes programs from stack frames larger than 64K
-/// (FrameSize and LiveOffsets would overflow). FrameTablePrinter will abort if
-/// either condition is detected in a function which uses the collector.
-/// 
-void OcamlGCMetadataPrinter::finishAssembly(std::ostream &OS, AsmPrinter &AP,
-                                            const TargetAsmInfo &TAI) {
-  const char *AddressDirective;
-  int AddressAlignLog;
-  if (AP.TM.getTargetData()->getPointerSize() == sizeof(int32_t)) {
-    AddressDirective = TAI.getData32bitsDirective();
-    AddressAlignLog = 2;
-  } else {
-    AddressDirective = TAI.getData64bitsDirective();
-    AddressAlignLog = 3;
-  }
-
-  AP.SwitchToTextSection(TAI.getTextSection());
-  EmitCamlGlobal(getModule(), OS, AP, TAI, "code_end");
-  
-  AP.SwitchToDataSection(TAI.getDataSection());
-  EmitCamlGlobal(getModule(), OS, AP, TAI, "data_end");
-  
-  OS << AddressDirective << 0; // FIXME: Why does ocaml emit this??
-  AP.EOL();
-  
-  AP.SwitchToDataSection(TAI.getDataSection());
-  EmitCamlGlobal(getModule(), OS, AP, TAI, "frametable");
-  
-  for (iterator FI = begin(), FE = end(); FI != FE; ++FI) {
-    CollectorMetadata &MD = **FI;
-    
-    OS << "\t" << TAI.getCommentString() << " live roots for "
-       << MD.getFunction().getNameStart() << "\n";
-    
-    for (CollectorMetadata::iterator PI = MD.begin(),
-                                     PE = MD.end(); PI != PE; ++PI) {
-      
-      uint64_t FrameSize = MD.getFrameSize();
-      if (FrameSize >= 1<<16) {
-        cerr << "Function '" << MD.getFunction().getNameStart()
-             << "' is too large for the ocaml collector! "
-             << "Frame size " << FrameSize << " >= 65536.\n";
-        abort(); // Very rude!
-      }
-      
-      size_t LiveCount = MD.live_size(PI);
-      if (LiveCount >= 1<<16) {
-        cerr << "Function '" << MD.getFunction().getNameStart()
-             << "' is too large for the ocaml collector! "
-             << "Live root count " << LiveCount << " >= 65536.\n";
-        abort(); // Very rude!
-      }
-      
-      OS << AddressDirective
-         << TAI.getPrivateGlobalPrefix() << "label" << PI->Num;
-      AP.EOL("call return address");
-      
-      AP.EmitInt16(FrameSize);
-      AP.EOL("stack frame size");
-      
-      AP.EmitInt16(LiveCount);
-      AP.EOL("live root count");
-      
-      for (CollectorMetadata::live_iterator LI = MD.live_begin(PI),
-                                            LE = MD.live_end(PI);
-                                            LI != LE; ++LI) {
-        assert(LI->StackOffset < 1<<16 &&
-               "GC root stack offset is outside of fixed stack frame and out "
-               "of range for Ocaml collector!");
-        
-        OS << "\t.word\t" << LI->StackOffset;
-        AP.EOL("stack offset");
-      }
-      
-      AP.EmitAlignment(AddressAlignLog);
-    }
-  }
-}