Drop toy GC runtime.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65801 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 1 insertions, 226 deletions

diff --git a/runtime/GC/GCInterface.h b/runtime/GC/GCInterface.h
deleted file mode 100644
index a62ac3c714..0000000000
--- a/runtime/GC/GCInterface.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*===-- GCInterface.h - Public interface exposed by garbage collectors ----===*\
-|*
-|*                     The LLVM Compiler Infrastructure
-|*
-|* This file is distributed under the University of Illinois Open Source
-|* License. See LICENSE.TXT for details.
-|*
-|*===----------------------------------------------------------------------===*|
-|*
-|* This file defines the common public interface that must be exposed by all
-|* LLVM garbage collectors.
-|*
-\*===----------------------------------------------------------------------===*/
-
-#ifndef GCINTERFACE_H
-#define GCINTERFACE_H
-
-/* llvm_cg_walk_gcroots - This function is exposed by the LLVM code generator,
- * and allows us to traverse the roots on the stack.
- */
-void llvm_cg_walk_gcroots(void (*FP)(void **Root, void *Meta));
-
-
-/* llvm_gc_initialize - This function is called to initalize the garbage
- * collector.
- */
-void llvm_gc_initialize(unsigned InitialHeapSize);
-
-/* llvm_gc_allocate - This function allocates Size bytes from the heap and
- * returns a pointer to it.
- */
-void *llvm_gc_allocate(unsigned Size);
-
-/* llvm_gc_collect - This function forces a garbage collection cycle.
- */
-void llvm_gc_collect();
-
-/* llvm_gc_read - This function should be implemented to include any read
- * barrier code that is needed by the garbage collector.
- */
-void *llvm_gc_read(void *ObjPtr, void **FieldPtr);
-
-/* llvm_gc_write - This function should be implemented to include any write
- * barrier code that is needed by the garbage collector.
- */
-void llvm_gc_write(void *V, void *ObjPtr, void **FieldPtr);
-
-#endif
diff --git a/runtime/GC/Makefile b/runtime/GC/Makefile
deleted file mode 100644
index b053e25286..0000000000
--- a/runtime/GC/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-##===- runtime/GC/Makefile ---------------------------------*- Makefile -*-===##
-# 
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source
-# License. See LICENSE.TXT for details.
-# 
-##===----------------------------------------------------------------------===##
-
-LEVEL = ../..
-PARALLEL_DIRS := SemiSpace
-EXTRA_DIST := gc_exported_symbols.lst
-include $(LEVEL)/Makefile.common
-
-# Install target for libraries: Copy into $LLVMGCCDIR/bytecode-libs
-#
-install::
-
-clean::
diff --git a/runtime/GC/SemiSpace/Makefile b/runtime/GC/SemiSpace/Makefile
deleted file mode 100644
index babcc80980..0000000000
--- a/runtime/GC/SemiSpace/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-##===- runtime/GC/SemiSpace/Makefile -----------------------*- Makefile -*-===##
-# 
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source
-# License. See LICENSE.TXT for details.
-# 
-##===----------------------------------------------------------------------===##
-
-LEVEL = ../../..
-BYTECODE_LIBRARY = 1
-LIBRARYNAME = gcsemispace
-BYTECODE_DESTINATION = $(CFERuntimeLibDir)
-EXPORTED_SYMBOL_FILE = $(PROJ_SRC_DIR)/../gc_exported_symbols.lst
-
-include $(LEVEL)/Makefile.common
-
-CompileCommonOpts := $(filter-out -pedantic,$(CompileCommonOpts))
-CompileCommonOpts := $(filter-out -Wno-long-long,$(CompileCommonOpts))
diff --git a/runtime/GC/SemiSpace/README.txt b/runtime/GC/SemiSpace/README.txt
deleted file mode 100644
index 0ddf2e0426..0000000000
--- a/runtime/GC/SemiSpace/README.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-//===----------------------------------------------------------------------===//
-
-Possible enhancement: If a collection cycle happens and the heap is not
-compacted very much (say less than 25% of the allocated memory was freed), the
-memory regions should be doubled in size.
diff --git a/runtime/GC/SemiSpace/semispace.c b/runtime/GC/SemiSpace/semispace.c
deleted file mode 100644
index 0ae6e11bd2..0000000000
--- a/runtime/GC/SemiSpace/semispace.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/*===-- semispace.c - Simple semi-space copying garbage collector ---------===*\
-|*
-|*                     The LLVM Compiler Infrastructure
-|*
-|* This file is distributed under the University of Illinois Open Source
-|* License. See LICENSE.TXT for details.
-|* 
-|*===----------------------------------------------------------------------===*|
-|* 
-|* This garbage collector is an extremely simple copying collector.  It splits
-|* the managed region of memory into two pieces: the current space to allocate
-|* from, and the copying space.  When the portion being allocated from fills up,
-|* a garbage collection cycle happens, which copies all live blocks to the other
-|* half of the managed space.
-|*
-\*===----------------------------------------------------------------------===*/
-
-#include "../GCInterface.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-/* AllocPtr - This points to the next byte that is available for allocation.
- */
-static char *AllocPtr;
-
-/* AllocEnd - This points to the first byte not available for allocation.  When
- * AllocPtr passes this, we have run out of space.
- */
-static char *AllocEnd;
-
-/* CurSpace/OtherSpace - These pointers point to the two regions of memory that
- * we switch between.  The unallocated portion of the CurSpace is known to be
- * zero'd out, but the OtherSpace contains junk.
- */
-static void *CurSpace, *OtherSpace;
-
-/* SpaceSize - The size of each space. */
-static unsigned SpaceSize;
-
-/* llvm_gc_initialize - Allocate the two spaces that we plan to switch between.
- */
-void llvm_gc_initialize(unsigned InitialHeapSize) {
-  SpaceSize = InitialHeapSize/2;
-  CurSpace = AllocPtr = calloc(1, SpaceSize);
-  OtherSpace = malloc(SpaceSize);
-  AllocEnd = AllocPtr + SpaceSize;
-}
-
-/* We always want to inline the fast path, but never want to inline the slow
- * path.
- */
-void *llvm_gc_allocate(unsigned Size) __attribute__((always_inline));
-static void* llvm_gc_alloc_slow(unsigned Size) __attribute__((noinline));
-
-void *llvm_gc_allocate(unsigned Size) {
-  char *OldAP = AllocPtr;
-  char *NewEnd = OldAP+Size;
-  if (NewEnd > AllocEnd)
-    return llvm_gc_alloc_slow(Size);
-  AllocPtr = NewEnd;
-  return OldAP;
-}
-
-static void* llvm_gc_alloc_slow(unsigned Size) {
-  llvm_gc_collect();
-  if (AllocPtr+Size > AllocEnd) {
-    fprintf(stderr, "Garbage collector ran out of memory "
-            "allocating object of size: %d\n", Size);
-    exit(1);
-  }
-
-  return llvm_gc_allocate(Size);
-}
-
-
-static void process_pointer(void **Root, void *Meta) {
-  printf("process_root[0x%p] = 0x%p\n", (void*) Root, (void*) *Root);
-}
-
-void llvm_gc_collect() {
-  // Clear out the space we will be copying into.
-  // FIXME: This should do the copy, then clear out whatever space is left.
-  memset(OtherSpace, 0, SpaceSize);
-
-  printf("Garbage collecting!!\n");
-  llvm_cg_walk_gcroots(process_pointer);
-  abort();
-}
-
-/* We use no read/write barriers */
-void *llvm_gc_read(void *ObjPtr, void **FieldPtr) { return *FieldPtr; }
-void llvm_gc_write(void *V, void *ObjPtr, void **FieldPtr) { *FieldPtr = V; }
-
-
-/*===----------------------------------------------------------------------===**
- * FIXME: This should be in a code-generator specific library, but for now this
- * will work for all code generators.
- */
-typedef struct FrameMap FrameMap;
-struct FrameMap {
-  int32_t NumRoots; // Number of roots in stack frame.
-  int32_t NumMeta;  // Number of metadata descriptors. May be < NumRoots.
-  void *Meta[];     // May be absent for roots without metadata.
-};
-
-typedef struct StackEntry StackEntry;
-struct StackEntry {
-  StackEntry *Next;       // Caller's stack entry.
-  const FrameMap *Map;    // Pointer to constant FrameMap.
-  void *Roots[];          // Stack roots (in-place array).
-};
-StackEntry *llvm_gc_root_chain;
-
-void llvm_cg_walk_gcroots(void (*FP)(void **Root, void *Meta)) {
-  StackEntry *R;
-  for (R = llvm_gc_root_chain; R; R = R->Next) {
-    unsigned i, e;
-    for (i = 0, e = R->Map->NumMeta; i != e; ++i)
-      FP(&R->Roots[i], R->Map->Meta[i]);
-    for (e = R->Map->NumRoots; i != e; ++i)
-      FP(&R->Roots[i], NULL);
-  }
-}
-/* END FIXME! */
-
-
diff --git a/runtime/GC/gc_exported_symbols.lst b/runtime/GC/gc_exported_symbols.lst
deleted file mode 100644
index 0ed60f57ee..0000000000
--- a/runtime/GC/gc_exported_symbols.lst
+++ /dev/null
@@ -1,7 +0,0 @@
-llvm_gc_initialize
-llvm_gc_allocate
-llvm_gc_collect
-llvm_gc_write
-llvm_gc_read
-
-llvm_gc_root_chain
\ No newline at end of file
diff --git a/runtime/Makefile b/runtime/Makefile
index 3883041d2e..9937c11e3b 100644
--- a/runtime/Makefile
+++ b/runtime/Makefile
@@ -11,7 +11,7 @@ LEVEL = ..
 include $(LEVEL)/Makefile.config
 
 ifneq ($(wildcard $(LLVMGCC)),)
-PARALLEL_DIRS  := libprofile GC
+PARALLEL_DIRS  := libprofile
 else
 PARALLEL_DIRS  := 
 install all ::