diff --git a/Makefile b/Makefile
index 97a7388..c45ac97 100644
--- a/Makefile
+++ b/Makefile
@@ -15,23 +15,28 @@
 #   3. Build VMCore, which builds the Intrinsics.inc file used by libs.
 #   4. Build libs, which are needed by llvm-config.
 #   5. Build llvm-config, which determines inter-lib dependencies for tools.
-#   6. Build tools, docs.
+#   6. Build tools, runtime, docs.
 #
 DIRS := lib/System lib/Support utils lib/VMCore lib tools/llvm-config \
-        tools docs
+        tools runtime docs
         
 OPTIONAL_DIRS := examples projects
 EXTRA_DIST := test llvm.spec include win32 Xcode
 
 include $(LEVEL)/Makefile.config 
 
+# llvm-gcc4 doesn't need runtime libs.
+ifeq ($(LLVMGCC_MAJVERS),4)
+  DIRS := $(filter-out runtime, $(DIRS))
+endif
+
 ifeq ($(MAKECMDGOALS),libs-only)
-  DIRS := $(filter-out tools docs, $(DIRS))
+  DIRS := $(filter-out tools runtime docs, $(DIRS))
   OPTIONAL_DIRS :=
 endif
 
 ifeq ($(MAKECMDGOALS),tools-only)
-  DIRS := $(filter-out docs, $(DIRS))
+  DIRS := $(filter-out runtime docs, $(DIRS))
   OPTIONAL_DIRS :=
 endif
 
diff --git a/Makefile.config.in b/Makefile.config.in
index f005c69..2652db3 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -207,6 +207,11 @@
 #DISABLE_ASSERTIONS = 1
 @DISABLE_ASSERTIONS@
 
+# When DEBUG_RUNTIME is enabled, the runtime libraries will retain debug
+# symbols.
+#DEBUG_RUNTIME = 1
+@DEBUG_RUNTIME@
+
 # When ENABLE_PROFILING is enabled, the llvm source base is built with profile
 # information to allow gprof to be used to get execution frequencies.
 #ENABLE_PROFILING = 1
diff --git a/Makefile.rules b/Makefile.rules
index a8b1b80..f80cc25 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -1099,10 +1099,18 @@
 	$(Echo) "Compiling $*.c to asm for $(BuildMode) build" $(PIC_FLAG)
 	$(MAYBE_PIC_Compile.C) $< -o $@ -S
 
+
 # make the C and C++ compilers strip debug info out of bytecode libraries.
+ifdef DEBUG_RUNTIME
+$(ObjectsBC): $(ObjDir)/%.bc: $(ObjDir)/%.ll $(GCCAS)
+	$(Echo) "Compiling $*.ll to $*.bc for $(BuildMode) build (bytecode)"
+	$(Verb) $(GCCAS) $< -o $@
+else
 $(ObjectsBC): $(ObjDir)/%.bc: $(ObjDir)/%.ll $(GCCAS)
 	$(Echo) "Compiling $*.ll to $*.bc for $(BuildMode) build (bytecode)"
 	$(Verb) $(GCCAS) -strip-debug $< -o $@
+endif
+
 
 #---------------------------------------------------------
 # Provide rule to build .bc files from .ll sources,
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 445e1ba..4b9e0c3 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -268,6 +268,15 @@
   AC_SUBST(DISABLE_ASSERTIONS,[[DISABLE_ASSERTIONS=1]])
 fi
 
+dnl --enable-debug-runtime : should runtime libraries have debug symbols?
+AC_ARG_ENABLE(debug-runtime,
+   AS_HELP_STRING([--enable-debug-runtime,Build runtime libs with debug symbols (default is NO)]),,enableval=no)
+if test ${enableval} = "no" ; then
+  AC_SUBST(DEBUG_RUNTIME,[[]])
+else
+  AC_SUBST(DEBUG_RUNTIME,[[DEBUG_RUNTIME=1]])
+fi
+
 dnl --enable-jit: check whether they want to enable the jit
 AC_ARG_ENABLE(jit,
   AS_HELP_STRING(--enable-jit,
@@ -811,6 +820,7 @@
 AC_CONFIG_MAKEFILE(Makefile.common)
 AC_CONFIG_MAKEFILE(examples/Makefile)
 AC_CONFIG_MAKEFILE(lib/Makefile)
+AC_CONFIG_MAKEFILE(runtime/Makefile)
 AC_CONFIG_MAKEFILE(test/Makefile)
 AC_CONFIG_MAKEFILE(test/Makefile.tests)
 AC_CONFIG_MAKEFILE(tools/Makefile)
@@ -823,6 +833,8 @@
 dnl Warn loudly if llvm-gcc was not obviously working
 if test "$llvm_cv_llvmgcc_sanity" = "no" ; then
  AC_MSG_WARN([***** llvm-gcc/llvm-g++ was not found, or does not appear to be ])
- AC_MSG_WARN([***** working. Please make sure you have llvm-gcc and llvm-g++ ])
- AC_MSG_WARN([***** in your path before configuring LLVM.])
+ AC_MSG_WARN([***** working. Please make sure you have llvm-gcc and llvm-g++ in])
+ AC_MSG_WARN([***** your path before configuring LLVM. The runtime libraries])
+ AC_MSG_WARN([***** (llvm/runtime) will not be built but you should be able to])
+ AC_MSG_WARN([***** build the llvm tools.])
 fi
diff --git a/configure b/configure
index 7de4517..7ae686b 100755
--- a/configure
+++ b/configure
@@ -830,6 +830,7 @@
 CVSBUILD
 ENABLE_OPTIMIZED
 DISABLE_ASSERTIONS
+DEBUG_RUNTIME
 JIT
 TARGET_HAS_JIT
 ENABLE_DOXYGEN
@@ -1519,6 +1520,7 @@
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-optimized
   --enable-assertions
+  --enable-debug-runtime
   --enable-jit            Enable Just In Time Compiling (default is YES)
   --enable-doxygen        Build doxygen documentation (default is NO)
   --enable-threads        Use threads if available (default is YES)
@@ -4561,6 +4563,21 @@
 
 fi
 
+# Check whether --enable-debug-runtime was given.
+if test "${enable_debug_runtime+set}" = set; then
+  enableval=$enable_debug_runtime;
+else
+  enableval=no
+fi
+
+if test ${enableval} = "no" ; then
+  DEBUG_RUNTIME=
+
+else
+  DEBUG_RUNTIME=DEBUG_RUNTIME=1
+
+fi
+
 # Check whether --enable-jit was given.
 if test "${enable_jit+set}" = set; then
   enableval=$enable_jit;
@@ -10281,7 +10298,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 10284 "configure"
+#line 10301 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12425,7 +12442,7 @@
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 12428 "configure"' > conftest.$ac_ext
+  echo '#line 12445 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -14143,11 +14160,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14146: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14163: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:14150: \$? = $ac_status" >&5
+   echo "$as_me:14167: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -14411,11 +14428,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14414: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14431: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:14418: \$? = $ac_status" >&5
+   echo "$as_me:14435: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -14515,11 +14532,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14518: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14535: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:14522: \$? = $ac_status" >&5
+   echo "$as_me:14539: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -16967,7 +16984,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 16970 "configure"
+#line 16987 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -17067,7 +17084,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 17070 "configure"
+#line 17087 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -19435,11 +19452,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:19438: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:19455: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:19442: \$? = $ac_status" >&5
+   echo "$as_me:19459: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -19539,11 +19556,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:19542: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:19559: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:19546: \$? = $ac_status" >&5
+   echo "$as_me:19563: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -21109,11 +21126,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21112: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21129: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:21116: \$? = $ac_status" >&5
+   echo "$as_me:21133: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -21213,11 +21230,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21216: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21233: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:21220: \$? = $ac_status" >&5
+   echo "$as_me:21237: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -23448,11 +23465,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:23451: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:23468: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:23455: \$? = $ac_status" >&5
+   echo "$as_me:23472: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -23716,11 +23733,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:23719: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:23736: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:23723: \$? = $ac_status" >&5
+   echo "$as_me:23740: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -23820,11 +23837,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:23823: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:23840: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:23827: \$? = $ac_status" >&5
+   echo "$as_me:23844: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -33414,6 +33431,9 @@
 ac_config_commands="$ac_config_commands lib/Makefile"
 
 
+ac_config_commands="$ac_config_commands runtime/Makefile"
+
+
 ac_config_commands="$ac_config_commands test/Makefile"
 
 
@@ -34007,6 +34027,7 @@
     "Makefile.common") CONFIG_COMMANDS="$CONFIG_COMMANDS Makefile.common" ;;
     "examples/Makefile") CONFIG_COMMANDS="$CONFIG_COMMANDS examples/Makefile" ;;
     "lib/Makefile") CONFIG_COMMANDS="$CONFIG_COMMANDS lib/Makefile" ;;
+    "runtime/Makefile") CONFIG_COMMANDS="$CONFIG_COMMANDS runtime/Makefile" ;;
     "test/Makefile") CONFIG_COMMANDS="$CONFIG_COMMANDS test/Makefile" ;;
     "test/Makefile.tests") CONFIG_COMMANDS="$CONFIG_COMMANDS test/Makefile.tests" ;;
     "tools/Makefile") CONFIG_COMMANDS="$CONFIG_COMMANDS tools/Makefile" ;;
@@ -34148,6 +34169,7 @@
 CVSBUILD!$CVSBUILD$ac_delim
 ENABLE_OPTIMIZED!$ENABLE_OPTIMIZED$ac_delim
 DISABLE_ASSERTIONS!$DISABLE_ASSERTIONS$ac_delim
+DEBUG_RUNTIME!$DEBUG_RUNTIME$ac_delim
 JIT!$JIT$ac_delim
 TARGET_HAS_JIT!$TARGET_HAS_JIT$ac_delim
 ENABLE_DOXYGEN!$ENABLE_DOXYGEN$ac_delim
@@ -34170,7 +34192,6 @@
 LN_S!$LN_S$ac_delim
 CMP!$CMP$ac_delim
 CP!$CP$ac_delim
-DATE!$DATE$ac_delim
 _ACEOF
 
   if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -34212,6 +34233,7 @@
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   cat >conf$$subs.sed <<_ACEOF
+DATE!$DATE$ac_delim
 FIND!$FIND$ac_delim
 MKDIR!$MKDIR$ac_delim
 MV!$MV$ac_delim
@@ -34277,7 +34299,7 @@
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 63; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 64; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
@@ -34688,6 +34710,8 @@
    ${SHELL} ${llvm_src}/autoconf/install-sh -c ${srcdir}/examples/Makefile examples/Makefile ;;
     "lib/Makefile":C) ${llvm_src}/autoconf/mkinstalldirs `dirname lib/Makefile`
    ${SHELL} ${llvm_src}/autoconf/install-sh -c ${srcdir}/lib/Makefile lib/Makefile ;;
+    "runtime/Makefile":C) ${llvm_src}/autoconf/mkinstalldirs `dirname runtime/Makefile`
+   ${SHELL} ${llvm_src}/autoconf/install-sh -c ${srcdir}/runtime/Makefile runtime/Makefile ;;
     "test/Makefile":C) ${llvm_src}/autoconf/mkinstalldirs `dirname test/Makefile`
    ${SHELL} ${llvm_src}/autoconf/install-sh -c ${srcdir}/test/Makefile test/Makefile ;;
     "test/Makefile.tests":C) ${llvm_src}/autoconf/mkinstalldirs `dirname test/Makefile.tests`
@@ -34909,8 +34933,12 @@
 if test "$llvm_cv_llvmgcc_sanity" = "no" ; then
  { echo "$as_me:$LINENO: WARNING: ***** llvm-gcc/llvm-g++ was not found, or does not appear to be " >&5
 echo "$as_me: WARNING: ***** llvm-gcc/llvm-g++ was not found, or does not appear to be " >&2;}
- { echo "$as_me:$LINENO: WARNING: ***** working. Please make sure you have llvm-gcc and llvm-g++ " >&5
-echo "$as_me: WARNING: ***** working. Please make sure you have llvm-gcc and llvm-g++ " >&2;}
- { echo "$as_me:$LINENO: WARNING: ***** in your path before configuring LLVM." >&5
-echo "$as_me: WARNING: ***** in your path before configuring LLVM." >&2;}
+ { echo "$as_me:$LINENO: WARNING: ***** working. Please make sure you have llvm-gcc and llvm-g++ in" >&5
+echo "$as_me: WARNING: ***** working. Please make sure you have llvm-gcc and llvm-g++ in" >&2;}
+ { echo "$as_me:$LINENO: WARNING: ***** your path before configuring LLVM. The runtime libraries" >&5
+echo "$as_me: WARNING: ***** your path before configuring LLVM. The runtime libraries" >&2;}
+ { echo "$as_me:$LINENO: WARNING: ***** (llvm/runtime) will not be built but you should be able to" >&5
+echo "$as_me: WARNING: ***** (llvm/runtime) will not be built but you should be able to" >&2;}
+ { echo "$as_me:$LINENO: WARNING: ***** build the llvm tools." >&5
+echo "$as_me: WARNING: ***** build the llvm tools." >&2;}
 fi
diff --git a/runtime/GC/GCInterface.h b/runtime/GC/GCInterface.h
new file mode 100644
index 0000000..4eb4818
--- /dev/null
+++ b/runtime/GC/GCInterface.h
@@ -0,0 +1,48 @@
+/*===-- GCInterface.h - Public interface exposed by garbage collectors ----===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and 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
new file mode 100644
index 0000000..b57dc85
--- /dev/null
+++ b/runtime/GC/Makefile
@@ -0,0 +1,19 @@
+##===- runtime/GC/Makefile ---------------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and 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
new file mode 100644
index 0000000..6f8e54c
--- /dev/null
+++ b/runtime/GC/SemiSpace/Makefile
@@ -0,0 +1,19 @@
+##===- runtime/GC/SemiSpace/Makefile -----------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and 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/semispace.c b/runtime/GC/SemiSpace/semispace.c
new file mode 100644
index 0000000..cb5864b
--- /dev/null
+++ b/runtime/GC/SemiSpace/semispace.c
@@ -0,0 +1,122 @@
+/*===-- semispace.c - Simple semi-space copying garbage collector ---------===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and 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 GCRoot {
+  void **RootPtr;
+  void *Meta;
+} GCRoot;
+
+typedef struct GCRoots {
+  struct GCRoots *Next;
+  unsigned NumRoots;
+  GCRoot RootRecords[];
+} GCRoots;
+GCRoots *llvm_gc_root_chain;
+
+void llvm_cg_walk_gcroots(void (*FP)(void **Root, void *Meta)) {
+  GCRoots *R = llvm_gc_root_chain;
+  for (; R; R = R->Next) {
+    unsigned i, e;
+    for (i = 0, e = R->NumRoots; i != e; ++i)
+      FP(R->RootRecords[i].RootPtr, R->RootRecords[i].Meta);
+  }
+}
+/* END FIXME! */
+
+
diff --git a/runtime/GC/gc_exported_symbols.lst b/runtime/GC/gc_exported_symbols.lst
new file mode 100644
index 0000000..0ed60f5
--- /dev/null
+++ b/runtime/GC/gc_exported_symbols.lst
@@ -0,0 +1,7 @@
+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/GCCLibraries/Makefile b/runtime/GCCLibraries/Makefile
new file mode 100644
index 0000000..b976f12
--- /dev/null
+++ b/runtime/GCCLibraries/Makefile
@@ -0,0 +1,12 @@
+##===- runtime/GCCLibraries/Makefile -----------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../..
+PARALLEL_DIRS := crtend libc libgcc libm 
+include $(LEVEL)/Makefile.common
diff --git a/runtime/GCCLibraries/README.txt b/runtime/GCCLibraries/README.txt
new file mode 100644
index 0000000..24890d2
--- /dev/null
+++ b/runtime/GCCLibraries/README.txt
@@ -0,0 +1,7 @@
+This directory contains libraries which are used when building the GCC 
+front-end.  For the most part, these are just stub libraries, but some 
+of them contain actual code.
+
+In particular, the crtend library contains the runtime code to handle
+static constructors and destructors for C and C++ programs.
+
diff --git a/runtime/GCCLibraries/crtend/Exception.cpp b/runtime/GCCLibraries/crtend/Exception.cpp
new file mode 100644
index 0000000..d4ac290
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/Exception.cpp
@@ -0,0 +1,54 @@
+//===- Exception.cpp - Generic language-independent exceptions ------------===//
+//
+// This file defines the the shared data structures used by all language
+// specific exception handling runtime libraries.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Exception.h"
+
+// Thread local state for exception handling.  FIXME: This should really be made
+// thread-local!
+
+// UncaughtExceptionStack - The stack of exceptions currently being thrown.
+static llvm_exception *UncaughtExceptionStack = 0;
+
+// __llvm_eh_has_uncaught_exception - This is used to implement
+// std::uncaught_exception.
+//
+bool __llvm_eh_has_uncaught_exception() throw() {
+  return UncaughtExceptionStack != 0;
+}
+
+// __llvm_eh_current_uncaught_exception - This function checks to see if the
+// current uncaught exception is of the specified language type.  If so, it
+// returns a pointer to the exception area data.
+//
+void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType) throw() {
+  if (UncaughtExceptionStack->ExceptionType == HandlerType)
+    return UncaughtExceptionStack+1;
+  return 0;
+}
+
+// __llvm_eh_add_uncaught_exception - This adds the specified exception to the
+// top of the uncaught exception stack.  The exception should not already be on
+// the stack!
+void __llvm_eh_add_uncaught_exception(llvm_exception *E) throw() {
+  E->Next = UncaughtExceptionStack;
+  UncaughtExceptionStack = E;
+}
+
+
+// __llvm_eh_get_uncaught_exception - Returns the current uncaught exception.
+// There must be an uncaught exception for this to work!
+llvm_exception *__llvm_eh_get_uncaught_exception() throw() {
+  return UncaughtExceptionStack;
+}
+
+// __llvm_eh_pop_from_uncaught_stack - Remove the current uncaught exception
+// from the top of the stack.
+llvm_exception *__llvm_eh_pop_from_uncaught_stack() throw() {
+  llvm_exception *E = __llvm_eh_get_uncaught_exception();
+  UncaughtExceptionStack = E->Next;
+  return E;
+}
diff --git a/runtime/GCCLibraries/crtend/Exception.h b/runtime/GCCLibraries/crtend/Exception.h
new file mode 100644
index 0000000..dc4d3a5
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/Exception.h
@@ -0,0 +1,71 @@
+//===- Exception.h - Generic language-independent exceptions ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the the shared data structures used by all language
+// specific exception handling runtime libraries.
+//
+// NOTE NOTE NOTE: A copy of this file lives in llvmgcc/libstdc++-v3/libsupc++/
+// Any modifications to this file must keep it in sync!
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef EXCEPTION_H
+#define EXCEPTION_H
+
+struct llvm_exception {
+  // ExceptionDestructor - This call-back function is used to destroy the
+  // current exception, without requiring the caller to know what the concrete
+  // exception type is.
+  //
+  void (*ExceptionDestructor)(llvm_exception *);
+
+  // ExceptionType - This field identifies what runtime library this exception
+  // came from.  Currently defined values are:
+  //     0 - Error
+  //     1 - longjmp exception (see longjmp-exception.c)
+  //     2 - C++ exception (see c++-exception.c)
+  //
+  unsigned ExceptionType;
+
+  // Next - This points to the next exception in the current stack.
+  llvm_exception *Next;
+
+  // HandlerCount - This is a count of the number of handlers which have
+  // currently caught this exception.  If the handler is caught and this number
+  // falls to zero, the exception is destroyed.
+  //
+  unsigned HandlerCount;
+
+  // isRethrown - This field is set on an exception if it has been 'throw;'n.
+  // This is needed because the exception might exit through a number of the
+  // end_catch statements matching the number of begin_catch statements that
+  // have been processed.  When this happens, the exception should become
+  // uncaught, not dead.
+  //
+  int isRethrown;
+};
+
+enum {
+  ErrorException = 0,
+  SJLJException  = 1,
+  CXXException   = 2
+};
+
+// Language independent exception handling API...
+//
+extern "C" {
+  bool __llvm_eh_has_uncaught_exception() throw();
+  void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType) throw();
+  void __llvm_eh_add_uncaught_exception(llvm_exception *E) throw();
+
+  llvm_exception *__llvm_eh_get_uncaught_exception() throw();
+  llvm_exception *__llvm_eh_pop_from_uncaught_stack() throw();
+}
+
+#endif
diff --git a/runtime/GCCLibraries/crtend/Makefile b/runtime/GCCLibraries/crtend/Makefile
new file mode 100644
index 0000000..1fd3167
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/Makefile
@@ -0,0 +1,83 @@
+##===- runtime/GCCLibraries/crtend/Makefile ----------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+#
+# This directory contains the C and C++ runtime libraries for the LLVM GCC
+# front-ends.  See the README.txt file for more details.
+#
+# Since this archive has strange requirements, we use some custom rules for 
+# building it.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+DONT_BUILD_RELINKED = 1
+LIBRARYNAME = crtend
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+MainSrc      := crtend.c
+GenericEHSrc := Exception.cpp
+SJLJEHSrc    := SJLJ-Exception.cpp
+
+EXTRA_DIST   := $(MainSrc) $(GenericEHSrc) $(SJLJEHSrc) \
+                comp_main.lst comp_genericeh.lst comp_sjljeh.lst
+
+include $(LEVEL)/Makefile.common
+
+MainObj      := $(ObjDir)/crtend.bc
+GenericEHObj := $(ObjDir)/Exception.bc
+SJLJEHObj    := $(ObjDir)/SJLJ-Exception.bc
+
+# __main and ctor/dtor support component
+$(ObjDir)/comp_main.bc: $(MainObj)
+	$(Echo) Linking $(notdir $@) component...
+	$(Verb) $(GCCLD) -link-as-library \
+	-internalize-public-api-file=$(PROJ_SRC_DIR)/comp_main.lst \
+	$(MainObj) -o $@
+
+# Generic exception handling support runtime.
+$(ObjDir)/comp_genericeh.bc: $(GenericEHObj)
+	$(Echo) Linking $(notdir $@) component...
+	$(Verb) $(GCCLD) -link-as-library \
+	-internalize-public-api-file=$(PROJ_SRC_DIR)/comp_genericeh.lst \
+	$(GenericEHObj) -o $@ 
+
+# setjmp/longjmp exception handling support runtime.
+$(ObjDir)/comp_sjljeh.bc: $(SJLJEHObj)
+	$(Echo) Linking $(notdir $@) component...
+	$(Verb) $(GCCLD) -link-as-library \
+	-internalize-public-api-file=$(PROJ_SRC_DIR)/comp_sjljeh.lst \
+	$(SJLJEHObj) -o $@
+
+SYMBOLHACKEDOBJS := $(ObjDir)/comp_main.bc $(ObjDir)/comp_genericeh.bc \
+                    $(ObjDir)/comp_sjljeh.bc
+
+all-local:: $(LibName.BCA)
+
+ifdef BYTECODE_DESTINATION
+BytecodeDestDir := $(BYTECODE_DESTINATION)
+else
+BytecodeDestDir := $(PROJ_libdir)
+endif
+
+DestBytecodeLib = $(BytecodeDestDir)/lib$(LIBRARYNAME).a
+install-bytecode-local:: $(DestBytecodeLib)
+install-local:: $(DestBytecodeLib)
+
+$(LibName.BCA): $(SYMBOLHACKEDOBJS) $(LibDir)/.dir $(LLVMToolDir)/llvm-ar
+	$(Echo) Building $(BuildMode) Bytecode Archive $(notdir $@)
+	$(Verb) $(RM) -f $@
+	$(Verb) $(LArchive) $@ $(SYMBOLHACKEDOBJS)
+
+$(DestBytecodeLib): $(BytecodeDestDir) $(LibName.BCA) 
+	$(Echo) Installing $(BuildMode) Bytecode Archive $(DestBytecodeLib)
+	$(Verb) $(DataInstall) $(LibName.BCA) $(DestBytecodeLib)
+
+uninstall-local::
+	$(Echo) Uninstalling $(BuildMode) Bytecode Archive $(DestBytecodeLib)
+	-$(Verb) $(RM) -f $(DestBytecodeLib)
diff --git a/runtime/GCCLibraries/crtend/README.txt b/runtime/GCCLibraries/crtend/README.txt
new file mode 100644
index 0000000..a763cb2
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/README.txt
@@ -0,0 +1,15 @@
+This directory contains the C and C++ runtime libraries for the LLVM GCC
+front-ends.  It is composed of four distinct pieces:
+
+1. __main: now dead, but provided for compatibility.
+
+2. Generic EH support routines.  This is used by C/C++ programs that use
+   setjmp/longjmp, and by C++ programs that make use of exceptions.
+
+3. setjmp/longjmp EH support.  This is used by C/C++ programs that call SJLJ.
+
+4. C++ exception handling runtime support.
+
+These four components are compiled together into an archive file, so that
+applications using a subset of the four do not pull in unnecessary code and
+dependencies.
diff --git a/runtime/GCCLibraries/crtend/SJLJ-Exception.cpp b/runtime/GCCLibraries/crtend/SJLJ-Exception.cpp
new file mode 100644
index 0000000..6a3e472
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/SJLJ-Exception.cpp
@@ -0,0 +1,146 @@
+//===- SJLJ-Exception.cpp - SetJmp/LongJmp Exception Handling -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the API used by the Setjmp/Longjmp exception handling
+// runtime library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SJLJ-Exception.h"
+#include <cstdlib>
+#include <cassert>
+
+// Assert should only be used for debugging the runtime library.  Enabling it in
+// CVS will break some platforms!
+#undef assert
+#define assert(X)
+
+// get_sjlj_exception - Adjust the llvm_exception pointer to be an appropriate
+// llvm_sjlj_exception pointer.
+inline llvm_sjlj_exception *get_sjlj_exception(llvm_exception *E) {
+  assert(E->ExceptionType == SJLJException);
+  return (llvm_sjlj_exception*)(E+1) - 1;
+}
+
+// SetJmpMapEntry - One entry in a linked list of setjmps for the current
+// function.
+struct SetJmpMapEntry {
+  void *JmpBuf;
+  unsigned SetJmpID;
+  SetJmpMapEntry *Next;
+};
+
+// SJLJDestructor - This function is used to free the exception when
+// language-indent code needs to destroy the exception without knowing exactly
+// what type it is.
+static void SJLJDestructor(llvm_exception *E) {
+  free(get_sjlj_exception(E));
+}
+
+
+// __llvm_sjljeh_throw_longjmp - This function creates the longjmp exception and
+// returns.  It takes care of mapping the longjmp value from 0 -> 1 as
+// appropriate.  The caller should immediately call llvm.unwind after this
+// function call.
+void __llvm_sjljeh_throw_longjmp(void *JmpBuffer, int Val) throw() {
+  llvm_sjlj_exception *E =
+    (llvm_sjlj_exception *)malloc(sizeof(llvm_sjlj_exception));
+  E->BaseException.ExceptionDestructor = SJLJDestructor;
+  E->BaseException.ExceptionType = SJLJException;
+  E->BaseException.HandlerCount = 0;
+  E->BaseException.isRethrown = 0;
+  E->JmpBuffer = JmpBuffer;
+  E->LongJmpValue = Val ? Val : 1;
+
+  __llvm_eh_add_uncaught_exception(&E->BaseException);
+}
+
+// __llvm_sjljeh_init_setjmpmap - This funciton initializes the pointer provided
+// to an empty setjmp map, and should be called on entry to a function which
+// calls setjmp.
+void __llvm_sjljeh_init_setjmpmap(void **SetJmpMap) throw() {
+  *SetJmpMap = 0;
+}
+
+// __llvm_sjljeh_destroy_setjmpmap - This function frees all memory associated
+// with the specified setjmpmap structure.  It should be called on all exits
+// (returns or unwinds) from the function which calls ...init_setjmpmap.
+void __llvm_sjljeh_destroy_setjmpmap(void **SetJmpMap) throw() {
+  SetJmpMapEntry *Next;
+  for (SetJmpMapEntry *SJE = *(SetJmpMapEntry**)SetJmpMap; SJE; SJE = Next) {
+    Next = SJE->Next;
+    free(SJE);
+  }
+}
+
+// __llvm_sjljeh_add_setjmp_to_map - This function adds or updates an entry to
+// the map, to indicate which setjmp should be returned to if a longjmp happens.
+void __llvm_sjljeh_add_setjmp_to_map(void **SetJmpMap, void *JmpBuf,
+                                     unsigned SetJmpID) throw() {
+  SetJmpMapEntry **SJE = (SetJmpMapEntry**)SetJmpMap;
+
+  // Scan for a pre-existing entry...
+  for (; *SJE; SJE = &(*SJE)->Next)
+    if ((*SJE)->JmpBuf == JmpBuf) {
+      (*SJE)->SetJmpID = SetJmpID;
+      return;
+    }
+
+  // No prexisting entry found, append to the end of the list...
+  SetJmpMapEntry *New = (SetJmpMapEntry *)malloc(sizeof(SetJmpMapEntry));
+  *SJE = New;
+  New->JmpBuf = JmpBuf;
+  New->SetJmpID = SetJmpID;
+  New->Next = 0;
+}
+
+// __llvm_sjljeh_is_longjmp_exception - This function returns true if the
+// current uncaught exception is a longjmp exception.  This is the first step of
+// catching a sjlj exception.
+bool __llvm_sjljeh_is_longjmp_exception() throw() {
+  return __llvm_eh_current_uncaught_exception_type(SJLJException) != 0;
+}
+
+// __llvm_sjljeh_get_longjmp_value - This function returns the value that the
+// setjmp call should "return".  This requires that the current uncaught
+// exception be a sjlj exception, though it does not require the exception to be
+// caught by this function.
+int __llvm_sjljeh_get_longjmp_value() throw() {
+  llvm_sjlj_exception *E =
+    get_sjlj_exception(__llvm_eh_get_uncaught_exception());
+  return E->LongJmpValue;
+}
+
+// __llvm_sjljeh_try_catching_longjmp_exception - This function checks to see if
+// the current uncaught longjmp exception matches any of the setjmps collected
+// in the setjmpmap structure.  If so, it catches and destroys the exception,
+// returning the index of the setjmp which caught the exception.  If not, it
+// leaves the exception uncaught and returns a value of ~0.
+unsigned __llvm_sjljeh_try_catching_longjmp_exception(void **SetJmpMap) throw(){
+  llvm_sjlj_exception *E =
+    get_sjlj_exception(__llvm_eh_get_uncaught_exception());
+
+  // Scan for a matching entry in the SetJmpMap...
+  SetJmpMapEntry *SJE = *(SetJmpMapEntry**)SetJmpMap;
+  for (; SJE; SJE = SJE->Next)
+    if (SJE->JmpBuf == E->JmpBuffer) {
+      // "Catch" and destroy the exception...
+      __llvm_eh_pop_from_uncaught_stack();
+
+      // We know it's a longjmp exception, so we can just free it instead of
+      // calling the destructor.
+      free(E);
+
+      // Return the setjmp ID which we should branch to...
+      return SJE->SetJmpID;
+    }
+
+  // No setjmp in this function catches the exception!
+  return ~0;
+}
diff --git a/runtime/GCCLibraries/crtend/SJLJ-Exception.h b/runtime/GCCLibraries/crtend/SJLJ-Exception.h
new file mode 100644
index 0000000..ac27cbe
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/SJLJ-Exception.h
@@ -0,0 +1,80 @@
+//===- SJLJ-Exception.h - SetJmp/LongJmp Exception Handling -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the data structures and API used by the Setjmp/Longjmp
+// exception handling runtime library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SJLJ_EXCEPTION_H
+#define SJLJ_EXCEPTION_H
+
+#include "Exception.h"
+
+struct llvm_sjlj_exception {
+  // JmpBuffer - This is the buffer which was longjmp'd with.
+  //
+  void *JmpBuffer;
+
+  // LongJmpValue - The value passed into longjmp, which the corresponding
+  // setjmp should return.  Note that this value will never be equal to 0.
+  //
+  int LongJmpValue;
+
+  // BaseException - The language independent portion of the exception state.
+  // This is at the end of the record so that we can add additional members to
+  // this structure without breaking binary compatibility.
+  //
+  llvm_exception BaseException;
+};
+
+extern "C" {
+  // __llvm_sjljeh_throw_longjmp - This function creates the longjmp exception
+  // and returns.  It takes care of mapping the longjmp value from 0 -> 1 as
+  // appropriate.  The caller should immediately call llvm.unwind after this
+  // function call.
+  void __llvm_sjljeh_throw_longjmp(void *JmpBuffer, int Val) throw();
+
+  // __llvm_sjljeh_init_setjmpmap - This funciton initializes the pointer
+  // provided to an empty setjmp map, and should be called on entry to a
+  // function which calls setjmp.
+  void __llvm_sjljeh_init_setjmpmap(void **SetJmpMap) throw();
+
+  // __llvm_sjljeh_destroy_setjmpmap - This function frees all memory associated
+  // with the specified setjmpmap structure.  It should be called on all exits
+  // (returns or unwinds) from the function which calls ...init_setjmpmap.
+  void __llvm_sjljeh_destroy_setjmpmap(void **SetJmpMap) throw();
+
+  // __llvm_sjljeh_add_setjmp_to_map - This function adds or updates an entry to
+  // the map, to indicate which setjmp should be returned to if a longjmp
+  // happens.
+  void __llvm_sjljeh_add_setjmp_to_map(void **SetJmpMap, void *JmpBuf,
+                                       unsigned SetJmpID) throw();
+
+  // __llvm_sjljeh_is_longjmp_exception - This function returns true if the
+  // current uncaught exception is a longjmp exception.  This is the first step
+  // of catching a sjlj exception.
+  bool __llvm_sjljeh_is_longjmp_exception() throw();
+
+  // __llvm_sjljeh_get_longjmp_value - This function returns the value that the
+  // setjmp call should "return".  This requires that the current uncaught
+  // exception be a sjlj exception, though it does not require the exception to
+  // be caught by this function.
+  int __llvm_sjljeh_get_longjmp_value() throw();
+
+  // __llvm_sjljeh_try_catching_longjmp_exception - This function checks to see
+  // if the current uncaught longjmp exception matches any of the setjmps
+  // collected in the setjmpmap structure.  If so, it catches and destroys the
+  // exception, returning the index of the setjmp which caught the exception.
+  // If not, it leaves the exception uncaught and returns a value of ~0.
+  unsigned __llvm_sjljeh_try_catching_longjmp_exception(void **SetJmpMap)
+    throw();
+}
+
+#endif
diff --git a/runtime/GCCLibraries/crtend/comp_genericeh.lst b/runtime/GCCLibraries/crtend/comp_genericeh.lst
new file mode 100644
index 0000000..9270648
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/comp_genericeh.lst
@@ -0,0 +1,9 @@
+__main
+llvm.global_ctors
+llvm.global_dtors
+
+__llvm_eh_has_uncaught_exception
+__llvm_eh_current_uncaught_exception_type
+__llvm_eh_add_uncaught_exception
+__llvm_eh_get_uncaught_exception
+__llvm_eh_pop_from_uncaught_stack
diff --git a/runtime/GCCLibraries/crtend/comp_main.lst b/runtime/GCCLibraries/crtend/comp_main.lst
new file mode 100644
index 0000000..ea953b7
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/comp_main.lst
@@ -0,0 +1,3 @@
+__main
+llvm.global_ctors
+llvm.global_dtors
diff --git a/runtime/GCCLibraries/crtend/comp_sjljeh.lst b/runtime/GCCLibraries/crtend/comp_sjljeh.lst
new file mode 100644
index 0000000..afcaaf0
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/comp_sjljeh.lst
@@ -0,0 +1,7 @@
+__llvm_sjljeh_throw_longjmp
+__llvm_sjljeh_init_setjmpmap
+__llvm_sjljeh_destroy_setjmpmap
+__llvm_sjljeh_add_setjmp_to_map
+__llvm_sjljeh_is_longjmp_exception
+__llvm_sjljeh_get_longjmp_value
+__llvm_sjljeh_try_catching_longjmp_exception
diff --git a/runtime/GCCLibraries/crtend/crtend.c b/runtime/GCCLibraries/crtend/crtend.c
new file mode 100644
index 0000000..561b6fd
--- /dev/null
+++ b/runtime/GCCLibraries/crtend/crtend.c
@@ -0,0 +1,16 @@
+/*===- crtend.c - Initialization code for programs ------------------------===*\
+ * 
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file was developed by the LLVM research group and is distributed under
+ * the University of Illinois Open Source License. See LICENSE.TXT for details.
+ *
+ *===----------------------------------------------------------------------===*
+ *
+ * This file defines the __main function, which we preserve for backwards 
+ * compatibility.
+ *
+\*===----------------------------------------------------------------------===*/
+
+void __main(void) {
+}
diff --git a/runtime/GCCLibraries/libc/COPYING.LIB b/runtime/GCCLibraries/libc/COPYING.LIB
new file mode 100644
index 0000000..cf9b6b9
--- /dev/null
+++ b/runtime/GCCLibraries/libc/COPYING.LIB
@@ -0,0 +1,510 @@
+
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations
+below.
+
+  When we speak of free software, we are referring to freedom of use,
+not price.  Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+  To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights.  These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+  For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you.  You must make sure that they, too, receive or can get the source
+code.  If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it.  And you must show them these terms so they know their rights.
+
+  We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+  To protect each distributor, we want to make it very clear that
+there is no warranty for the free library.  Also, if the library is
+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
+^L
+  Finally, software patents pose a constant threat to the existence of
+any free program.  We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder.  Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
+  Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License.  This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License.  We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
+
+  When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library.  The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom.  The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
+
+  We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License.  It also provides other free software developers Less
+of an advantage over competing non-free programs.  These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries.  However, the Lesser license provides advantages in certain
+special circumstances.
+
+  For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it
+becomes a de-facto standard.  To achieve this, non-free programs must
+be allowed to use the library.  A more frequent case is that a free
+library does the same job as widely used non-free libraries.  In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+  In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software.  For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+  Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.  Pay close attention to the difference between a
+"work based on the library" and a "work that uses the library".  The
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
+^L
+                  GNU LESSER GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
+
+  A "library" means a collection of software functions and/or data
+prepared so as to be conveniently linked with application programs
+(which use some of those functions and data) to form executables.
+
+  The "Library", below, refers to any such software library or work
+which has been distributed under these terms.  A "work based on the
+Library" means either the Library or any derivative work under
+copyright law: that is to say, a work containing the Library or a
+portion of it, either verbatim or with modifications and/or translated
+straightforwardly into another language.  (Hereinafter, translation is
+included without limitation in the term "modification".)
+
+  "Source code" for a work means the preferred form of the work for
+making modifications to it.  For a library, complete source code means
+all the source code for all modules it contains, plus any associated
+interface definition files, plus the scripts used to control
+compilation and installation of the library.
+
+  Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running a program using the Library is not restricted, and output from
+such a program is covered only if its contents constitute a work based
+on the Library (independent of the use of the Library in a tool for
+writing it).  Whether that is true depends on what the Library does
+and what the program that uses the Library does.
+
+  1. You may copy and distribute verbatim copies of the Library's
+complete source code as you receive it, in any medium, provided that
+you conspicuously and appropriately publish on each copy an
+appropriate copyright notice and disclaimer of warranty; keep intact
+all the notices that refer to this License and to the absence of any
+warranty; and distribute a copy of this License along with the
+Library.
+
+  You may charge a fee for the physical act of transferring a copy,
+and you may at your option offer warranty protection in exchange for a
+fee.
+
+  2. You may modify your copy or copies of the Library or any portion
+of it, thus forming a work based on the Library, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) The modified work must itself be a software library.
+
+    b) You must cause the files modified to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    c) You must cause the whole of the work to be licensed at no
+    charge to all third parties under the terms of this License.
+
+    d) If a facility in the modified Library refers to a function or a
+    table of data to be supplied by an application program that uses
+    the facility, other than as an argument passed when the facility
+    is invoked, then you must make a good faith effort to ensure that,
+    in the event an application does not supply such function or
+    table, the facility still operates, and performs whatever part of
+    its purpose remains meaningful.
+
+    (For example, a function in a library to compute square roots has
+    a purpose that is entirely well-defined independent of the
+    application.  Therefore, Subsection 2d requires that any
+    application-supplied function or table used by this function must
+    be optional: if the application does not supply it, the square
+    root function must still compute square roots.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Library,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Library, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote
+it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Library.
+
+In addition, mere aggregation of another work not based on the Library
+with the Library (or with a work based on the Library) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may opt to apply the terms of the ordinary GNU General Public
+License instead of this License to a given copy of the Library.  To do
+this, you must alter all the notices that refer to this License, so
+that they refer to the ordinary GNU General Public License, version 2,
+instead of to this License.  (If a newer version than version 2 of the
+ordinary GNU General Public License has appeared, then you can specify
+that version instead if you wish.)  Do not make any other change in
+these notices.
+^L
+  Once this change is made in a given copy, it is irreversible for
+that copy, so the ordinary GNU General Public License applies to all
+subsequent copies and derivative works made from that copy.
+
+  This option is useful when you wish to copy part of the code of
+the Library into a program that is not a library.
+
+  4. You may copy and distribute the Library (or a portion or
+derivative of it, under Section 2) in object code or executable form
+under the terms of Sections 1 and 2 above provided that you accompany
+it with the complete corresponding machine-readable source code, which
+must be distributed under the terms of Sections 1 and 2 above on a
+medium customarily used for software interchange.
+
+  If distribution of object code is made by offering access to copy
+from a designated place, then offering equivalent access to copy the
+source code from the same place satisfies the requirement to
+distribute the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  5. A program that contains no derivative of any portion of the
+Library, but is designed to work with the Library by being compiled or
+linked with it, is called a "work that uses the Library".  Such a
+work, in isolation, is not a derivative work of the Library, and
+therefore falls outside the scope of this License.
+
+  However, linking a "work that uses the Library" with the Library
+creates an executable that is a derivative of the Library (because it
+contains portions of the Library), rather than a "work that uses the
+library".  The executable is therefore covered by this License.
+Section 6 states terms for distribution of such executables.
+
+  When a "work that uses the Library" uses material from a header file
+that is part of the Library, the object code for the work may be a
+derivative work of the Library even though the source code is not.
+Whether this is true is especially significant if the work can be
+linked without the Library, or if the work is itself a library.  The
+threshold for this to be true is not precisely defined by law.
+
+  If such an object file uses only numerical parameters, data
+structure layouts and accessors, and small macros and small inline
+functions (ten lines or less in length), then the use of the object
+file is unrestricted, regardless of whether it is legally a derivative
+work.  (Executables containing this object code plus portions of the
+Library will still fall under Section 6.)
+
+  Otherwise, if the work is a derivative of the Library, you may
+distribute the object code for the work under the terms of Section 6.
+Any executables containing that work also fall under Section 6,
+whether or not they are linked directly with the Library itself.
+^L
+  6. As an exception to the Sections above, you may also combine or
+link a "work that uses the Library" with the Library to produce a
+work containing portions of the Library, and distribute that work
+under terms of your choice, provided that the terms permit
+modification of the work for the customer's own use and reverse
+engineering for debugging such modifications.
+
+  You must give prominent notice with each copy of the work that the
+Library is used in it and that the Library and its use are covered by
+this License.  You must supply a copy of this License.  If the work
+during execution displays copyright notices, you must include the
+copyright notice for the Library among them, as well as a reference
+directing the user to the copy of this License.  Also, you must do one
+of these things:
+
+    a) Accompany the work with the complete corresponding
+    machine-readable source code for the Library including whatever
+    changes were used in the work (which must be distributed under
+    Sections 1 and 2 above); and, if the work is an executable linked
+    with the Library, with the complete machine-readable "work that
+    uses the Library", as object code and/or source code, so that the
+    user can modify the Library and then relink to produce a modified
+    executable containing the modified Library.  (It is understood
+    that the user who changes the contents of definitions files in the
+    Library will not necessarily be able to recompile the application
+    to use the modified definitions.)
+
+    b) Use a suitable shared library mechanism for linking with the
+    Library.  A suitable mechanism is one that (1) uses at run time a
+    copy of the library already present on the user's computer system,
+    rather than copying library functions into the executable, and (2)
+    will operate properly with a modified version of the library, if
+    the user installs one, as long as the modified version is
+    interface-compatible with the version that the work was made with.
+
+    c) Accompany the work with a written offer, valid for at least
+    three years, to give the same user the materials specified in
+    Subsection 6a, above, for a charge no more than the cost of
+    performing this distribution.
+
+    d) If distribution of the work is made by offering access to copy
+    from a designated place, offer equivalent access to copy the above
+    specified materials from the same place.
+
+    e) Verify that the user has already received a copy of these
+    materials or that you have already sent this user a copy.
+
+  For an executable, the required form of the "work that uses the
+Library" must include any data and utility programs needed for
+reproducing the executable from it.  However, as a special exception,
+the materials to be distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
+components (compiler, kernel, and so on) of the operating system on
+which the executable runs, unless that component itself accompanies
+the executable.
+
+  It may happen that this requirement contradicts the license
+restrictions of other proprietary libraries that do not normally
+accompany the operating system.  Such a contradiction means you cannot
+use both them and the Library together in an executable that you
+distribute.
+^L
+  7. You may place library facilities that are a work based on the
+Library side-by-side in a single library together with other library
+facilities not covered by this License, and distribute such a combined
+library, provided that the separate distribution of the work based on
+the Library and of the other library facilities is otherwise
+permitted, and provided that you do these two things:
+
+    a) Accompany the combined library with a copy of the same work
+    based on the Library, uncombined with any other library
+    facilities.  This must be distributed under the terms of the
+    Sections above.
+
+    b) Give prominent notice with the combined library of the fact
+    that part of it is a work based on the Library, and explaining
+    where to find the accompanying uncombined form of the same work.
+
+  8. You may not copy, modify, sublicense, link with, or distribute
+the Library except as expressly provided under this License.  Any
+attempt otherwise to copy, modify, sublicense, link with, or
+distribute the Library is void, and will automatically terminate your
+rights under this License.  However, parties who have received copies,
+or rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+  9. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Library or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Library (or any work based on the
+Library), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Library or works based on it.
+
+  10. Each time you redistribute the Library (or any work based on the
+Library), the recipient automatically receives a license from the
+original licensor to copy, distribute, link with or modify the Library
+subject to these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties with
+this License.
+^L
+  11. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Library at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Library by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Library.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply, and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  12. If the distribution and/or use of the Library is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Library under this License
+may add an explicit geographical distribution limitation excluding those
+countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  13. The Free Software Foundation may publish revised and/or new
+versions of the Lesser General Public License from time to time.
+Such new versions will be similar in spirit to the present version,
+but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Library
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation.  If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+^L
+  14. If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission.  For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this.  Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+                            NO WARRANTY
+
+  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+^L
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms
+of the ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.
+It is safest to attach them to the start of each source file to most
+effectively convey the exclusion of warranty; and each file should
+have at least the "copyright" line and a pointer to where the full
+notice is found.
+
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or
+your school, if any, to sign a "copyright disclaimer" for the library,
+if necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James
+  Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
+
+
diff --git a/runtime/GCCLibraries/libc/LICENSE.TXT b/runtime/GCCLibraries/libc/LICENSE.TXT
new file mode 100644
index 0000000..7bcfd36
--- /dev/null
+++ b/runtime/GCCLibraries/libc/LICENSE.TXT
@@ -0,0 +1,17 @@
+libc
+------------------------------------------------------------------------------
+The stripped down C library found in llvm/runtime/GCCLibraries/libc is licensed
+to you under the GNU Lesser General Public License (LGPL).  The license, along
+with copyright information, is in COPYING.LIB.
+
+Portions of glibc also contain copyrights and licenses from third parties.
+Those are listed in LICENSES.
+
+FSF copyright and warranty disclaimer:
+Copyright (C) 1991, 1992, 1996, 1997, 1999 Free Software Foundation, Inc.
+Copyright (C) 1995,96,97,2002 Free Software Foundation, Inc.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
diff --git a/runtime/GCCLibraries/libc/LICENSES b/runtime/GCCLibraries/libc/LICENSES
new file mode 100644
index 0000000..b3b8899
--- /dev/null
+++ b/runtime/GCCLibraries/libc/LICENSES
@@ -0,0 +1,219 @@
+This file contains the copying permission notices for various files in the
+GNU C Library distribution that have copyright owners other than the Free
+Software Foundation.  These notices all require that a copy of the notice
+be included in the accompanying documentation and be distributed with
+binary distributions of the code, so be sure to include this file along
+with any binary distributions derived from the GNU C Library.
+
+
+All code incorporated from 4.4 BSD is distributed under the following
+license:
+
+Copyright (C) 1991 Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. [This condition was removed.]
+4. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+
+The DNS resolver code, taken from BIND 4.9.5, is copyrighted both by
+UC Berkeley and by Digital Equipment Corporation.  The DEC portions
+are under the following license:
+
+Portions Copyright (C) 1993 by Digital Equipment Corporation.
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies, and
+that the name of Digital Equipment Corporation not be used in
+advertising or publicity pertaining to distribution of the document or
+software without specific, written prior permission.
+
+THE SOFTWARE IS PROVIDED ``AS IS'' AND DIGITAL EQUIPMENT CORP.
+DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL
+DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+The Sun RPC support (from rpcsrc-4.0) is covered by the following
+license:
+
+Copyright (C) 1984, Sun Microsystems, Inc.
+
+Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+unrestricted use provided that this legend is included on all tape media
+and as a part of the software program in whole or part.  Users may copy
+or modify Sun RPC without charge, but are not authorized to license or
+distribute it to anyone else except as part of a product or program
+developed by the user.
+
+SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+
+Sun RPC is provided with no support and without any obligation on the
+part of Sun Microsystems, Inc. to assist in its use, correction,
+modification or enhancement.
+
+SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+OR ANY PART THEREOF.
+
+In no event will Sun Microsystems, Inc. be liable for any lost revenue
+or profits or other special, indirect and consequential damages, even if
+Sun has been advised of the possibility of such damages.
+
+
+The following CMU license covers some of the support code for Mach,
+derived from Mach 3.0:
+
+Mach Operating System
+Copyright (C) 1991,1990,1989 Carnegie Mellon University
+All Rights Reserved.
+
+Permission to use, copy, modify and distribute this software and its
+documentation is hereby granted, provided that both the copyright
+notice and this permission notice appear in all copies of the
+software, derivative works or modified versions, and any portions
+thereof, and that both notices appear in supporting documentation.
+
+CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS ``AS IS''
+CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+
+Carnegie Mellon requests users of this software to return to
+
+ Software Distribution Coordinator
+ School of Computer Science
+ Carnegie Mellon University
+ Pittsburgh PA 15213-3890
+
+or Software.Distribution@CS.CMU.EDU any improvements or
+extensions that they make and grant Carnegie Mellon the rights to
+redistribute these changes.
+
+The file if_ppp.h is under the following CMU license:
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. Neither the name of the University nor the names of its contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY AND
+ CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+The following license covers the files from Intel's "Highly Optimized
+Mathematical Functions for Itanium" collection:
+
+Intel License Agreement
+
+Copyright (c) 2000, Intel Corporation
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+* The name of Intel Corporation may not be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+The files inet/getnameinfo.c and sysdeps/posix/getaddrinfo.c are copyright
+(C) by Craig Metz and are distributed under the following license:
+
+/* The Inner Net License, Version 2.00
+
+  The author(s) grant permission for redistribution and use in source and
+binary forms, with or without modification, of the software and documentation
+provided that the following conditions are met:
+
+0. If you receive a version of the software that is specifically labelled
+   as not being for redistribution (check the version message and/or README),
+   you are not permitted to redistribute that version of the software in any
+   way or form.
+1. All terms of the all other applicable copyrights and licenses must be
+   followed.
+2. Redistributions of source code must retain the authors' copyright
+   notice(s), this list of conditions, and the following disclaimer.
+3. Redistributions in binary form must reproduce the authors' copyright
+   notice(s), this list of conditions, and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+4. [The copyright holder has authorized the removal of this clause.]
+5. Neither the name(s) of the author(s) nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+  If these license terms cause you a real problem, contact the author.  */
diff --git a/runtime/GCCLibraries/libc/Makefile b/runtime/GCCLibraries/libc/Makefile
new file mode 100644
index 0000000..4dc2f88
--- /dev/null
+++ b/runtime/GCCLibraries/libc/Makefile
@@ -0,0 +1,19 @@
+##===- runtime/GCCLibraries/libc/Makefile ------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+BYTECODE_LIBRARY = 1
+DONT_BUILD_RELINKED = 1
+LIBRARYNAME = c
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+include $(LEVEL)/Makefile.common
+
+CompileCommonOpts := $(filter-out -pedantic,$(CompileCommonOpts))
+CompileCommonOpts := $(filter-out -Wno-long-long,$(CompileCommonOpts))
diff --git a/runtime/GCCLibraries/libc/README.txt b/runtime/GCCLibraries/libc/README.txt
new file mode 100644
index 0000000..c29ebc6
--- /dev/null
+++ b/runtime/GCCLibraries/libc/README.txt
@@ -0,0 +1,4 @@
+This directory contains source files to build the LLVM version of libc.
+
+Currently it is hacked together on a by-demand basis, but someday a proper
+port of libc would be very nice.
diff --git a/runtime/GCCLibraries/libc/atox.c b/runtime/GCCLibraries/libc/atox.c
new file mode 100644
index 0000000..726f432
--- /dev/null
+++ b/runtime/GCCLibraries/libc/atox.c
@@ -0,0 +1,118 @@
+//===-- atox.c - Ascii string parsers for LLVM libc Library -------*- C -*-===//
+// 
+// A lot of this code is ripped gratuitously from glibc and libiberty.
+//
+//===----------------------------------------------------------------------===//
+
+
+#define isspace(x) ((x) == ' ' || (x) == '\t' || (x) == '\n')
+#define isdigit(x) ((x) >= '0' && (x) <= '9')
+#define isupper(x) ((x) >= 'A' && (x) <= 'Z')
+#define islower(x) ((x) >= 'a' && (x) <= 'z')
+#define isalpha(x) (isupper(x) || islower(x))
+
+#ifndef ULONG_MAX
+#define ULONG_MAX       ((unsigned long)(~0L))          /* 0xFFFFFFFF */
+#endif
+
+#ifndef LONG_MAX
+#define LONG_MAX        ((long)(ULONG_MAX >> 1))        /* 0x7FFFFFFF */
+#endif
+
+#ifndef LONG_MIN
+#define LONG_MIN        ((long)(~LONG_MAX))             /* 0x80000000 */
+#endif
+
+#if 0
+/*
+ * Convert a string to a long integer.
+ *
+ * Ignores `locale' stuff.  Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+long strtol(const char *nptr, char **endptr, int base) {
+        register const char *s = nptr;
+        register unsigned long acc;
+        register int c;
+        register unsigned long cutoff;
+        register int neg = 0, any, cutlim;
+
+        /*
+         * Skip white space and pick up leading +/- sign if any.
+         * If base is 0, allow 0x for hex and 0 for octal, else
+         * assume decimal; if base is already 16, allow 0x.
+         */
+        do {
+                c = *s++;
+        } while (isspace(c));
+        if (c == '-') {
+                neg = 1;
+                c = *s++;
+        } else if (c == '+')
+                c = *s++;
+        if ((base == 0 || base == 16) &&
+            c == '0' && (*s == 'x' || *s == 'X')) {
+                c = s[1];
+                s += 2;
+                base = 16;
+        }
+        if (base == 0)
+                base = c == '0' ? 8 : 10;
+
+        /*
+         * Compute the cutoff value between legal numbers and illegal
+         * numbers.  That is the largest legal value, divided by the
+         * base.  An input number that is greater than this value, if
+         * followed by a legal input character, is too big.  One that
+         * is equal to this value may be valid or not; the limit
+         * between valid and invalid numbers is then based on the last
+         * digit.  For instance, if the range for longs is
+         * [-2147483648..2147483647] and the input base is 10,
+         * cutoff will be set to 214748364 and cutlim to either
+         * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
+         * a value > 214748364, or equal but the next digit is > 7 (or 8),
+         * the number is too big, and we will return a range error.
+         *
+         * Set any if any `digits' consumed; make it negative to indicate
+         * overflow.
+         */
+        cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX;
+        cutlim = cutoff % (unsigned long)base;
+        cutoff /= (unsigned long)base;
+        for (acc = 0, any = 0;; c = *s++) {
+                if (isdigit(c))
+                        c -= '0';
+                else if (isalpha(c))
+                        c -= isupper(c) ? 'A' - 10 : 'a' - 10;
+                else
+                        break;
+                if (c >= base)
+                        break;
+                if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim)
+                        any = -1;
+                else {
+                        any = 1;
+                        acc *= base;
+                        acc += c;
+                }
+        }
+        if (any < 0) {
+                acc = neg ? LONG_MIN : LONG_MAX;
+        } else if (neg)
+                acc = -acc;
+        if (endptr != 0)
+                *endptr = (char *) (any ? s - 1 : nptr);
+        return (acc);
+}
+
+
+/* Convert a string to an int.  */
+int atoi(const char *nptr) {
+  return (int)strtol(nptr, 0, 10);
+}
+
+/* Convert a string to a long int.  */
+long int atol(const char *nptr) {
+  return strtol(nptr, 0, 10);
+}
+#endif
diff --git a/runtime/GCCLibraries/libc/io.c b/runtime/GCCLibraries/libc/io.c
new file mode 100644
index 0000000..e09283ad
--- /dev/null
+++ b/runtime/GCCLibraries/libc/io.c
@@ -0,0 +1,18 @@
+//===-- io.c - IO routines for LLVM libc Library ------------------*- C -*-===//
+// 
+// A lot of this code is ripped gratuitously from glibc and libiberty.
+//
+//===----------------------------------------------------------------------===//
+
+int putchar(int);
+
+// The puts() function writes the string pointed to by s, followed by a 
+// NEWLINE character, to the standard output stream stdout. On success the 
+// number of characters written is returned; otherwise they return EOF.
+//
+int puts(const char *S) {
+  const char *Str = S;
+  while (*Str) putchar(*Str++);
+  putchar('\n');
+  return Str+1-S;
+}
diff --git a/runtime/GCCLibraries/libc/qsort.c b/runtime/GCCLibraries/libc/qsort.c
new file mode 100644
index 0000000..2949b78
--- /dev/null
+++ b/runtime/GCCLibraries/libc/qsort.c
@@ -0,0 +1,261 @@
+//===-- qsort.c - The qsort function for the LLVM libc Library ----*- C -*-===//
+// 
+// This code is a modified form of the qsort() function from the GNU C
+// library.
+//
+// Modifications:
+//  2003/05/29 - Code disabled for compilation.  Line wrapping changed.
+//
+//===----------------------------------------------------------------------===//
+
+/* Copyright (C) 1991, 1992, 1996, 1997, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Douglas C. Schmidt (schmidt@ics.uci.edu).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* If you consider tuning this algorithm, you should consult first:
+   Engineering a sort function; Jon Bentley and M. Douglas McIlroy;
+   Software - Practice and Experience; Vol. 23 (11), 1249-1265, 1993.  */
+
+#if 0
+
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Byte-wise swap two items of size SIZE. */
+#define SWAP(a, b, size)                        \
+  do                                            \
+    {                                           \
+      register size_t __size = (size);          \
+      register char *__a = (a), *__b = (b);     \
+      do                                        \
+        {                                       \
+          char __tmp = *__a;                    \
+          *__a++ = *__b;                        \
+          *__b++ = __tmp;                       \
+        } while (--__size > 0);                 \
+    } while (0)
+
+/* Discontinue quicksort algorithm when partition gets below this size.
+   This particular magic number was chosen to work best on a Sun 4/260. */
+#define MAX_THRESH 4
+
+/* Stack node declarations used to store unfulfilled partition obligations. */
+typedef struct
+  {
+    char *lo;
+    char *hi;
+  } stack_node;
+
+/* The next 4 #defines implement a very fast in-line stack abstraction. */
+/* The stack needs log (total_elements) entries (we could even subtract
+   log(MAX_THRESH)).  Since total_elements has type size_t, we get as
+   upper bound for log (total_elements):
+   bits per byte (CHAR_BIT) * sizeof(size_t).  */
+#define STACK_SIZE      (CHAR_BIT * sizeof(size_t))
+#define PUSH(low, high) ((void) ((top->lo = (low)), (top->hi = (high)), ++top))
+#define POP(low, high)  ((void) (--top, (low = top->lo), (high = top->hi)))
+#define STACK_NOT_EMPTY  (stack < top)
+
+
+/* Order size using quicksort.  This implementation incorporates
+   four optimizations discussed in Sedgewick:
+
+   1. Non-recursive, using an explicit stack of pointer that store the
+      next array partition to sort.  To save time, this maximum amount
+      of space required to store an array of SIZE_MAX is allocated on the
+      stack.  Assuming a 32-bit (64 bit) integer for size_t, this needs
+      only 32 * sizeof(stack_node) == 256 bytes (for 64 bit: 1024 bytes).
+      Pretty cheap, actually.
+
+   2. Chose the pivot element using a median-of-three decision tree.
+      This reduces the probability of selecting a bad pivot value and
+      eliminates certain extraneous comparisons.
+
+   3. Only quicksorts TOTAL_ELEMS / MAX_THRESH partitions, leaving
+      insertion sort to order the MAX_THRESH items within each partition.
+      This is a big win, since insertion sort is faster for small, mostly
+      sorted array segments.
+
+   4. The larger of the two sub-partitions is always pushed onto the
+      stack first, with the algorithm then concentrating on the
+      smaller partition.  This *guarantees* no more than log (total_elems)
+      stack size is needed (actually O(1) in this case)!  */
+
+typedef int(*__compar_fn_t)(const void *, const void *);
+void
+qsort (void *const pbase, size_t total_elems, size_t size,
+            __compar_fn_t cmp)
+{
+  register char *base_ptr = (char *) pbase;
+
+  const size_t max_thresh = MAX_THRESH * size;
+
+  if (total_elems == 0)
+    /* Avoid lossage with unsigned arithmetic below.  */
+    return;
+
+  if (total_elems > MAX_THRESH)
+    {
+      char *lo = base_ptr;
+      char *hi = &lo[size * (total_elems - 1)];
+      stack_node stack[STACK_SIZE];
+      stack_node *top = stack + 1;
+
+      while (STACK_NOT_EMPTY)
+        {
+          char *left_ptr;
+          char *right_ptr;
+
+          /* Select median value from among LO, MID, and HI. Rearrange
+             LO and HI so the three values are sorted. This lowers the
+             probability of picking a pathological pivot value and
+             skips a comparison for both the LEFT_PTR and RIGHT_PTR in
+             the while loops. */
+
+          char *mid = lo + size * ((hi - lo) / size >> 1);
+
+          if ((*cmp) ((void *) mid, (void *) lo) < 0)
+            SWAP (mid, lo, size);
+          if ((*cmp) ((void *) hi, (void *) mid) < 0)
+            SWAP (mid, hi, size);
+          else
+            goto jump_over;
+          if ((*cmp) ((void *) mid, (void *) lo) < 0)
+            SWAP (mid, lo, size);
+        jump_over:;
+
+          left_ptr  = lo + size;
+          right_ptr = hi - size;
+
+          /* Here's the famous ``collapse the walls'' section of quicksort.
+             Gotta like those tight inner loops!  They are the main reason
+             that this algorithm runs much faster than others. */
+          do
+            {
+              while ((*cmp) ((void *) left_ptr, (void *) mid) < 0)
+                left_ptr += size;
+
+              while ((*cmp) ((void *) mid, (void *) right_ptr) < 0)
+                right_ptr -= size;
+
+              if (left_ptr < right_ptr)
+                {
+                  SWAP (left_ptr, right_ptr, size);
+                  if (mid == left_ptr)
+                    mid = right_ptr;
+                  else if (mid == right_ptr)
+                    mid = left_ptr;
+                  left_ptr += size;
+                  right_ptr -= size;
+                }
+              else if (left_ptr == right_ptr)
+                {
+                  left_ptr += size;
+                  right_ptr -= size;
+                  break;
+                }
+            }
+          while (left_ptr <= right_ptr);
+
+          /* Set up pointers for next iteration.  First determine whether
+             left and right partitions are below the threshold size.  If so,
+             ignore one or both.  Otherwise, push the larger partition's
+             bounds on the stack and continue sorting the smaller one. */
+
+          if ((size_t) (right_ptr - lo) <= max_thresh)
+            {
+              if ((size_t) (hi - left_ptr) <= max_thresh)
+                /* Ignore both small partitions. */
+                POP (lo, hi);
+              else
+                /* Ignore small left partition. */
+                lo = left_ptr;
+            }
+          else if ((size_t) (hi - left_ptr) <= max_thresh)
+            /* Ignore small right partition. */
+            hi = right_ptr;
+          else if ((right_ptr - lo) > (hi - left_ptr))
+            {
+              /* Push larger left partition indices. */
+              PUSH (lo, right_ptr);
+              lo = left_ptr;
+            }
+          else
+            {
+              /* Push larger right partition indices. */
+              PUSH (left_ptr, hi);
+              hi = right_ptr;
+            }
+        }
+    }
+
+  /* Once the BASE_PTR array is partially sorted by quicksort the rest
+     is completely sorted using insertion sort, since this is efficient
+     for partitions below MAX_THRESH size. BASE_PTR points to the beginning
+     of the array to sort, and END_PTR points at the very last element in
+     the array (*not* one beyond it!). */
+
+#define min(x, y) ((x) < (y) ? (x) : (y))
+
+  {
+    char *const end_ptr = &base_ptr[size * (total_elems - 1)];
+    char *tmp_ptr = base_ptr;
+    char *thresh = min(end_ptr, base_ptr + max_thresh);
+    register char *run_ptr;
+
+    /* Find smallest element in first threshold and place it at the
+       array's beginning.  This is the smallest array element,
+       and the operation speeds up insertion sort's inner loop. */
+
+    for (run_ptr = tmp_ptr + size; run_ptr <= thresh; run_ptr += size)
+      if ((*cmp) ((void *) run_ptr, (void *) tmp_ptr) < 0)
+        tmp_ptr = run_ptr;
+
+    if (tmp_ptr != base_ptr)
+      SWAP (tmp_ptr, base_ptr, size);
+
+    /* Insertion sort, running from left-hand-side up to right-hand-side.  */
+
+    run_ptr = base_ptr + size;
+    while ((run_ptr += size) <= end_ptr)
+      {
+        tmp_ptr = run_ptr - size;
+        while ((*cmp) ((void *) run_ptr, (void *) tmp_ptr) < 0)
+          tmp_ptr -= size;
+
+        tmp_ptr += size;
+        if (tmp_ptr != run_ptr)
+          {
+            char *trav;
+
+            trav = run_ptr + size;
+            while (--trav >= run_ptr)
+              {
+                char c = *trav;
+                char *hi, *lo;
+
+                for (hi = lo = trav; (lo -= size) >= tmp_ptr; hi = lo)
+                  *hi = *lo;
+                *hi = c;
+              }
+          }
+      }
+  }
+}
+#endif
diff --git a/runtime/GCCLibraries/libc/remove.c b/runtime/GCCLibraries/libc/remove.c
new file mode 100644
index 0000000..b7d2fa2
--- /dev/null
+++ b/runtime/GCCLibraries/libc/remove.c
@@ -0,0 +1,51 @@
+//===-- remove.c - The remove function for the LLVM libc Library --*- C -*-===//
+// 
+// This code is a modified form of the remove() function from the GNU C
+// library.
+//
+// Modifications:
+//  2005/11/28 - Added to LLVM tree.  Functions renamed to allow compilation.
+//               Code to control symbol linkage types removed.
+//
+//===----------------------------------------------------------------------===//
+
+/* ANSI C `remove' function to delete a file or directory.  POSIX.1 version.
+   Copyright (C) 1995,96,97,2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+remove (const char * file)
+{
+  int save;
+
+  save = errno;
+  if (rmdir (file) == 0)
+    return 0;
+  else if (errno == ENOTDIR && unlink (file) == 0)
+    {
+      errno = (save);
+      return 0;
+    }
+
+  return -1;
+}
+
diff --git a/runtime/GCCLibraries/libc/string.c b/runtime/GCCLibraries/libc/string.c
new file mode 100644
index 0000000..bd43b34
--- /dev/null
+++ b/runtime/GCCLibraries/libc/string.c
@@ -0,0 +1,172 @@
+//===-- string.c - String functions for the LLVM libc Library -----*- C -*-===//
+// 
+// A lot of this code is ripped gratuitously from glibc and libiberty.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef strlen
+#undef strlen
+#endif
+size_t strlen(const char *Str) {
+  size_t Count = 0;
+  while (*Str) { ++Count; ++Str; }
+  return Count;
+}
+
+#ifdef strdup
+#undef strdup
+#endif
+char *strdup(const char *str) {
+  size_t Len = strlen(str);
+  char *Result = (char*)malloc((Len+1)*sizeof(char));
+  memcpy(Result, str, Len+1);
+  return Result;
+}
+
+#ifdef strndup
+#undef strndup
+#endif
+char *strndup(const char *str, size_t n) {
+  size_t Len = strlen(str);
+  if (Len > n) Len = n;
+  char *Result = (char*)malloc((Len+1)*sizeof(char));
+  memcpy(Result, str, Len);
+  Result[Len] = 0;
+  return Result;
+}
+
+#ifdef strcpy
+#undef strcpy
+#endif
+char *strcpy(char *s1, const char *s2) {
+  char *dest = s1;
+  while ((*s1++ = *s2++));
+  return dest;
+}
+
+#ifdef strncpy
+#undef strncpy
+#endif
+char *strncpy(char *s1, const char *s2, size_t n) {
+  char *dest = s1;
+  while (n-- && (*s1++ = *s2++));
+  return dest;
+}
+
+#ifdef strcat
+#undef strcat
+#endif
+char *strcat(char *s1, const char *s2) {
+  strcpy(s1+strlen(s1), s2);
+  return s1;
+}
+
+
+#ifdef strcmp
+#undef strcmp
+#endif
+/* Compare S1 and S2, returning less than, equal to or
+   greater than zero if S1 is lexicographically less than,
+   equal to or greater than S2.  */
+int strcmp (const char *p1, const char *p2) {
+  register const unsigned char *s1 = (const unsigned char *) p1;
+  register const unsigned char *s2 = (const unsigned char *) p2;
+  unsigned char c1, c2;
+
+  do
+    {
+      c1 = (unsigned char) *s1++;
+      c2 = (unsigned char) *s2++;
+      if (c1 == '\0')
+        return c1 - c2;
+    }
+  while (c1 == c2);
+
+  return c1 - c2;
+}
+
+// http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/generic/?cvsroot=glibc
+#if 0
+typedef unsigned int op_t;
+#define OPSIZ 4
+
+void *memset (void *dstpp, int c, size_t len) {
+  long long int dstp = (long long int) dstpp;
+
+  if (len >= 8)
+    {
+      size_t xlen;
+      op_t cccc;
+
+      cccc = (unsigned char) c;
+      cccc |= cccc << 8;
+      cccc |= cccc << 16;
+      if (OPSIZ > 4)
+        /* Do the shift in two steps to avoid warning if long has 32 bits.  */
+        cccc |= (cccc << 16) << 16;
+
+      /* There are at least some bytes to set.
+         No need to test for LEN == 0 in this alignment loop.  */
+      while (dstp % OPSIZ != 0)
+        {
+          ((unsigned char *) dstp)[0] = c;
+          dstp += 1;
+          len -= 1;
+        }
+
+      /* Write 8 `op_t' per iteration until less than 8 `op_t' remain.  */
+      xlen = len / (OPSIZ * 8);
+      while (xlen > 0)
+        {
+          ((op_t *) dstp)[0] = cccc;
+          ((op_t *) dstp)[1] = cccc;
+          ((op_t *) dstp)[2] = cccc;
+          ((op_t *) dstp)[3] = cccc;
+          ((op_t *) dstp)[4] = cccc;
+          ((op_t *) dstp)[5] = cccc;
+          ((op_t *) dstp)[6] = cccc;
+          ((op_t *) dstp)[7] = cccc;
+          dstp += 8 * OPSIZ;
+          xlen -= 1;
+        }
+      len %= OPSIZ * 8;
+
+      /* Write 1 `op_t' per iteration until less than OPSIZ bytes remain.  */
+      xlen = len / OPSIZ;
+      while (xlen > 0)
+        {
+          ((op_t *) dstp)[0] = cccc;
+          dstp += OPSIZ;
+          xlen -= 1;
+        }
+      len %= OPSIZ;
+    }
+
+  /* Write the last few bytes.  */
+  while (len > 0)
+    {
+      ((unsigned char *) dstp)[0] = c;
+      dstp += 1;
+      len -= 1;
+    }
+
+  return dstpp;
+}
+#endif
+
+#ifdef memcpy
+#undef memcpy
+#endif
+void *memcpy(void *dstpp, const void *srcpp, size_t len) {
+  char *dstp = (char*)dstpp;
+  char *srcp = (char*) srcpp;
+  unsigned i;
+
+  for (i = 0; i < len; ++i)
+    dstp[i] = srcp[i];
+
+  return dstpp;
+}
diff --git a/runtime/GCCLibraries/libgcc/Makefile b/runtime/GCCLibraries/libgcc/Makefile
new file mode 100644
index 0000000..74b9c91
--- /dev/null
+++ b/runtime/GCCLibraries/libgcc/Makefile
@@ -0,0 +1,16 @@
+##===- runtime/GCCLibraries/libgcc/Makefile ----------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+BYTECODE_LIBRARY = 1
+DONT_BUILD_RELINKED = 1
+LIBRARYNAME = gcc
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+include $(LEVEL)/Makefile.common
diff --git a/runtime/GCCLibraries/libgcc/eprintf.c b/runtime/GCCLibraries/libgcc/eprintf.c
new file mode 100644
index 0000000..d4229fa
--- /dev/null
+++ b/runtime/GCCLibraries/libgcc/eprintf.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+void abort(void);
+
+/* This is used by the `assert' macro.  */
+void
+__eprintf (const char *string, const char *expression,
+           unsigned int line, const char *filename)
+{
+  fprintf (stderr, string, expression, line, filename);
+  fflush (stderr);
+  abort ();
+}
+
diff --git a/runtime/GCCLibraries/libm/Makefile b/runtime/GCCLibraries/libm/Makefile
new file mode 100644
index 0000000..74ec12e
--- /dev/null
+++ b/runtime/GCCLibraries/libm/Makefile
@@ -0,0 +1,16 @@
+##===- runtime/GCCLibraries/libm/Makefile ------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+BYTECODE_LIBRARY = 1
+DONT_BUILD_RELINKED = 1
+LIBRARYNAME = m
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+include $(LEVEL)/Makefile.common
diff --git a/runtime/GCCLibraries/libm/temp.c b/runtime/GCCLibraries/libm/temp.c
new file mode 100644
index 0000000..163971a
--- /dev/null
+++ b/runtime/GCCLibraries/libm/temp.c
@@ -0,0 +1 @@
+typedef int INTEGER;
diff --git a/runtime/Makefile b/runtime/Makefile
new file mode 100644
index 0000000..8d6f0ff
--- /dev/null
+++ b/runtime/Makefile
@@ -0,0 +1,43 @@
+##===- runtime/Makefile ------------------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ..
+include $(LEVEL)/Makefile.config
+
+ifeq ($(LLVMGCC_MAJVERS),4)
+PARALLEL_DIRS :=
+install all::
+	$(Echo) "Warning: These runtime libraries only need to be built with"
+	$(Echo) "Warning: llvm-gcc version 3. They are automatically included"
+	$(Echo) "Warning: with llvm-gcc version 4 and beyond"
+else 
+ifneq ($(wildcard $(LLVMGCC)),)
+PARALLEL_DIRS  := GCCLibraries  libdummy libprofile libtrace GC
+else
+PARALLEL_DIRS  := 
+install all ::
+	@echo '********' Warning: Your LLVMGCCDIR is set incorrectly.  Check 
+	@echo '********' Warning: llvm/Makefile.config to make sure it matches
+	@echo '********' Warning: the directory where the C front-end is
+	@echo '********' Warning: installed,and re-run configure if it does not.
+endif
+
+# Disable libprofile: a faulty libtool is generated by autoconf which breaks the
+# build on Sparc
+ifeq ($(ARCH), Sparc)
+PARALLEL_DIRS := $(filter-out libprofile, $(PARALLEL_DIRS))
+endif
+endif
+
+include $(LEVEL)/Makefile.common
+
+# Install target for libraries: Copy into $LLVMGCCDIR/bytecode-libs
+#
+install::
+
diff --git a/runtime/README.txt b/runtime/README.txt
new file mode 100644
index 0000000..2e2e547
--- /dev/null
+++ b/runtime/README.txt
@@ -0,0 +1,4 @@
+This directory contains the various runtime libraries used by components of 
+the LLVM compiler.  For example, the automatic pool allocation transformation
+inserts calls to an external pool allocator library.  This runtime library is
+an example of the type of library that lives in these directories.
diff --git a/runtime/libdummy/Makefile b/runtime/libdummy/Makefile
new file mode 100644
index 0000000..6dad7bc
--- /dev/null
+++ b/runtime/libdummy/Makefile
@@ -0,0 +1,19 @@
+##===- runtime/libdummy/Makefile ---------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+BYTECODE_LIBRARY = 1
+DONT_BUILD_RELINKED = 1
+LIBRARYNAME = dummy
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+include $(LEVEL)/Makefile.common
+
+CompileCommonOpts := $(filter-out -pedantic,$(CompileCommonOpts))
+CompileCommonOpts := $(filter-out -Wno-long-long,$(CompileCommonOpts))
diff --git a/runtime/libdummy/README.txt b/runtime/libdummy/README.txt
new file mode 100644
index 0000000..08e7751
--- /dev/null
+++ b/runtime/libdummy/README.txt
@@ -0,0 +1,2 @@
+This directory contains stub routines which are occasionally useful when 
+performing alias analysis research.
diff --git a/runtime/libdummy/dummylib.c b/runtime/libdummy/dummylib.c
new file mode 100644
index 0000000..aa104f8
--- /dev/null
+++ b/runtime/libdummy/dummylib.c
@@ -0,0 +1,144 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdarg.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#if 0
+int stat(const char *file_name, struct stat *buf) { return 0; }
+int fstat(int filedes, struct stat *buf) { return 0; }
+int lstat(const char *file_name, struct stat *buf) { return 0; }
+
+// Varargs function definitions
+int ioctl(int d, int request, ...) {return 0; }
+int printf(const char *X) {return 0; }
+int sscanf(const char *X, const char *Y, ...) { return 0; }
+int fprintf(FILE *stream, const char *format, ...) { return 0; }
+
+
+int gettimeofday(struct timeval *tv, void *tz) { return 0; }
+void *xmalloc(size_t X) { return malloc(X); }
+  
+void srand(unsigned x) {}
+double exp(double x) { return 0; }
+double log(double x) { return 0; }
+double sqrt(double x) { return 0; }
+void exit(int x) {}
+int puts(const char *x) { return 0; }
+void __main() {}
+int atoi(const char*x) { return 1; }
+char *fgets(char*Ptr, int x, FILE*F) { return Ptr; }
+char *gets(char *C) { return C; }
+int fclose(FILE*F) { return 0; }
+FILE *fopen(const char *n, const char*x) { return malloc(sizeof(FILE)); }
+FILE *freopen(const char *path, const char *mode, FILE *stream) { return 0; }
+int fflush(FILE *F) { return 0; }
+size_t fwrite(const void* str, size_t N, size_t n, FILE *F) { return N; }
+void *memset(void *P, int X, size_t N) { return P; }
+void *memcpy(void *P, void *S, size_t N) { return P; }
+void *memmove(void *P, void *S, size_t N) { return P; }
+char *strcpy(char*Str1, const char *Str) { return Str1; }
+char *strcat(char*Str1, const char *Str) { return Str1; }
+size_t strlen(char *X) { return 0; }
+#undef putchar
+int putchar(int N) { return N; }
+int putc(int c, FILE *stream) { return c; }
+int fputc(int c, FILE *stream) { return c; }
+int fgetc(FILE *S) { return 0; }
+long ftell(FILE *F) { return 0; }
+int getc(FILE *S) { return 0; }
+size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream) { return 0; }
+int fseek(FILE *stream, long offset, int whence) { return 0; }
+int feof(FILE *stream) { return 0; }
+int fputs(const char *s, char *stream) { return 0; }
+int ferror(FILE *F) { return 0; }
+FILE *fdopen(int fildes, const char *mode) { return 0;}
+FILE *popen(const char *command, const char *type) { return 0; }
+int pclose(FILE *stream) { return 0; }
+ 
+int ungetc(int c, FILE *stream) { return 0; }
+int setvbuf(FILE *stream, char *buf, int mode , size_t size) { return 0; }
+void rewind(FILE*F) { }
+int fileno(FILE *stream) { return 1; }
+char *ttyname(int desc) { return 0; }
+long sysconf(int name) { return 0; }
+char *tmpnam(char *s) { return s; }
+
+void *calloc(size_t A, size_t B) { return malloc(A*B); }
+void *realloc(void *ptr, size_t N) { return ptr; } 
+const char *strerror(int N) { return 0; }
+int unlink(const char *path) { return 0; }
+void perror(const char *err) {}
+char *strrchr(const char *S, int C) { return (char*)S; }
+int memcmp(const char *A, const char *B, size_t N) { return 0; }
+ssize_t read(int fildes, void *buf, size_t nbyte) { return nbyte; }
+int close(int FD) { return 0; }
+int rename(const char *oldpath, const char *newpath) { return 0; }
+ssize_t write(int fd, const void *buf, size_t count) { return 0; }
+pid_t getpid(void) { return 0; }
+pid_t getppid(void) { return 0; }
+void setbuf(FILE *stream, char *buf) {}
+int isatty(int desc) { return 0; }
+int vsprintf(char *str, const char *format, va_list ap) { return 0; }
+char *getcwd(char *buf, size_t size) { return buf; }
+
+void qsort(void *base, size_t nmemb, size_t size,
+           int(*compar)(const void *, const void *)) {
+  compar(base, base);
+}
+
+
+
+#include <sys/times.h>
+clock_t times(struct tms *buf) { return 0; }
+
+
+#include <setjmp.h>
+int setjmp(jmp_buf env) { return 0; }
+void longjmp(jmp_buf env, int val) {}
+int kill(pid_t pid, int sig) { return 0; }
+int system(const char *string) { return 0; }
+char *getenv(const char *name) { return 0; }
+typedef void (*sighandler_t)(int);
+
+sighandler_t signal(int signum, sighandler_t handler) { return handler; }
+
+
+
+
+char *strchr(const char *s, int c) { return (char*)s; }
+int strcmp(const char *s1, const char *s2) { return 0; }
+int strncmp(const char *s1, const char *s2, size_t n) { return 0; }
+char *strncpy(char *s1, const char *s2, size_t n) { return s1; }
+char *strpbrk(const char *s, const char *accept) { return (char*)s; }
+char *strncat(char *dest, const char *src, size_t n) { return dest; }
+
+double atof(const char *C) { return 0; }
+
+
+long clock() { return 0; }
+char *ctime(const time_t *timep) { return 0; }
+time_t time(time_t *t) { return *t = 0; }
+
+double sin(double x) { return x; }
+double cos(double x) { return x; }
+double tan(double x) { return x; }
+double asin(double x) { return x; }
+double acos(double x) { return x; }
+double atan(double x) { return x; }
+double cosh(double x) { return x; }
+double sinh(double x) { return x; }
+double ceil(double x) { return x; }
+double floor(double x) { return x; }
+
+double atan2(double x, double y) { return x; }
+double fmod(double x, double y) { return x; }
+double pow(double x, double y) { return x; }
+
+int tolower(int x) { return x; }
+int toupper(int x) { return x; }
+
+#endif
diff --git a/runtime/libprofile/BasicBlockTracing.c b/runtime/libprofile/BasicBlockTracing.c
new file mode 100644
index 0000000..e70dc05
--- /dev/null
+++ b/runtime/libprofile/BasicBlockTracing.c
@@ -0,0 +1,67 @@
+/*===-- BasicBlockTracing.c - Support library for basic block tracing -----===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|* 
+|*===----------------------------------------------------------------------===*|
+|* 
+|* This file implements the call back routines for the basic block tracing
+|* instrumentation pass.  This should be used with the -trace-basic-blocks
+|* LLVM pass.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static unsigned *ArrayStart, *ArrayEnd, *ArrayCursor;
+
+/* WriteAndFlushBBTraceData - write out the currently accumulated trace data
+ * and reset the cursor to point to the beginning of the buffer.
+ */
+static void WriteAndFlushBBTraceData () {
+  write_profiling_data(BBTraceInfo, ArrayStart, (ArrayCursor - ArrayStart));
+  ArrayCursor = ArrayStart;
+}
+
+/* BBTraceAtExitHandler - When the program exits, just write out any remaining 
+ * data and free the trace buffer.
+ */
+static void BBTraceAtExitHandler() {
+  WriteAndFlushBBTraceData ();
+  free (ArrayStart);
+}
+
+/* llvm_trace_basic_block - called upon hitting a new basic block. */
+void llvm_trace_basic_block (unsigned BBNum) {
+  *ArrayCursor++ = BBNum;
+  if (ArrayCursor == ArrayEnd)
+    WriteAndFlushBBTraceData ();
+}
+
+/* llvm_start_basic_block_tracing - This is the main entry point of the basic
+ * block tracing library.  It is responsible for setting up the atexit
+ * handler and allocating the trace buffer.
+ */
+int llvm_start_basic_block_tracing(int argc, const char **argv,
+                              unsigned *arrayStart, unsigned numElements) {
+  int Ret;
+  const unsigned BufferSize = 128 * 1024;
+  unsigned ArraySize;
+
+  Ret = save_arguments(argc, argv);
+
+  /* Allocate a buffer to contain BB tracing data */
+  ArraySize = BufferSize / sizeof (unsigned);
+  ArrayStart = malloc (ArraySize * sizeof (unsigned));
+  ArrayEnd = ArrayStart + ArraySize;
+  ArrayCursor = ArrayStart;
+
+  /* Set up the atexit handler. */
+  atexit (BBTraceAtExitHandler);
+
+  return Ret;
+}
diff --git a/runtime/libprofile/BlockProfiling.c b/runtime/libprofile/BlockProfiling.c
new file mode 100644
index 0000000..2b1b011
--- /dev/null
+++ b/runtime/libprofile/BlockProfiling.c
@@ -0,0 +1,45 @@
+/*===-- BlockProfiling.c - Support library for block profiling ------------===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|* 
+|*===----------------------------------------------------------------------===*|
+|* 
+|* This file implements the call back routines for the block profiling
+|* instrumentation pass.  This should be used with the -insert-block-profiling
+|* LLVM pass.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <stdlib.h>
+
+static unsigned *ArrayStart;
+static unsigned NumElements;
+
+/* BlockProfAtExitHandler - When the program exits, just write out the profiling
+ * data.
+ */
+static void BlockProfAtExitHandler() {
+  /* Note that if this were doing something more intelligent with the
+   * instrumentation, we could do some computation here to expand what we
+   * collected into simple block profiles. (Or we could do it in llvm-prof.)
+   * Regardless, we directly count each block, so no expansion is necessary.
+   */
+  write_profiling_data(BlockInfo, ArrayStart, NumElements);
+}
+
+
+/* llvm_start_block_profiling - This is the main entry point of the block
+ * profiling library.  It is responsible for setting up the atexit handler.
+ */
+int llvm_start_block_profiling(int argc, const char **argv,
+                               unsigned *arrayStart, unsigned numElements) {
+  int Ret = save_arguments(argc, argv);
+  ArrayStart = arrayStart;
+  NumElements = numElements;
+  atexit(BlockProfAtExitHandler);
+  return Ret;
+}
diff --git a/runtime/libprofile/CommonProfiling.c b/runtime/libprofile/CommonProfiling.c
new file mode 100644
index 0000000..f37b018
--- /dev/null
+++ b/runtime/libprofile/CommonProfiling.c
@@ -0,0 +1,117 @@
+/*===-- CommonProfiling.c - Profiling support library support -------------===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|* 
+|*===----------------------------------------------------------------------===*|
+|* 
+|* This file implements functions used by the various different types of
+|* profiling implementations.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+static char *SavedArgs = 0;
+static unsigned SavedArgsLength = 0;
+
+static const char *OutputFilename = "llvmprof.out";
+
+/* save_arguments - Save argc and argv as passed into the program for the file
+ * we output.
+ */
+int save_arguments(int argc, const char **argv) {
+  unsigned Length, i;
+  if (SavedArgs || !argv) return argc;  /* This can be called multiple times */
+
+  /* Check to see if there are any arguments passed into the program for the
+   * profiler.  If there are, strip them off and remember their settings.
+   */
+  while (argc > 1 && !strncmp(argv[1], "-llvmprof-", 10)) {
+    /* Ok, we have an llvmprof argument.  Remove it from the arg list and decide
+     * what to do with it.
+     */
+    const char *Arg = argv[1];
+    memmove(&argv[1], &argv[2], (argc-1)*sizeof(char*));
+    --argc;
+
+    if (!strcmp(Arg, "-llvmprof-output")) {
+      if (argc == 1)
+        puts("-llvmprof-output requires a filename argument!");
+      else {
+        OutputFilename = strdup(argv[1]);
+        memmove(&argv[1], &argv[2], (argc-1)*sizeof(char*));
+        --argc;
+      }
+    } else {
+      printf("Unknown option to the profiler runtime: '%s' - ignored.\n", Arg);
+    }
+  }
+
+  for (Length = 0, i = 0; i != (unsigned)argc; ++i)
+    Length += strlen(argv[i])+1;
+
+  SavedArgs = (char*)malloc(Length);
+  for (Length = 0, i = 0; i != (unsigned)argc; ++i) {
+    unsigned Len = strlen(argv[i]);
+    memcpy(SavedArgs+Length, argv[i], Len);
+    Length += Len;
+    SavedArgs[Length++] = ' ';
+  }
+
+  SavedArgsLength = Length;
+
+  return argc;
+}
+
+
+/* write_profiling_data - Write a raw block of profiling counters out to the
+ * llvmprof.out file.  Note that we allow programs to be instrumented with
+ * multiple different kinds of instrumentation.  For this reason, this function
+ * may be called more than once.
+ */
+void write_profiling_data(enum ProfilingType PT, unsigned *Start,
+                          unsigned NumElements) {
+  static int OutFile = -1;
+  int PTy;
+  
+  /* If this is the first time this function is called, open the output file for
+   * appending, creating it if it does not already exist.
+   */
+  if (OutFile == -1) {
+    OutFile = open(OutputFilename, O_CREAT | O_WRONLY | O_APPEND, 0666);
+    if (OutFile == -1) {
+      fprintf(stderr, "LLVM profiling runtime: while opening '%s': ",
+              OutputFilename);
+      perror("");
+      return;
+    }
+
+    /* Output the command line arguments to the file. */
+    {
+      int PTy = ArgumentInfo;
+      int Zeros = 0;
+      write(OutFile, &PTy, sizeof(int));
+      write(OutFile, &SavedArgsLength, sizeof(unsigned));
+      write(OutFile, SavedArgs, SavedArgsLength);
+      /* Pad out to a multiple of four bytes */
+      if (SavedArgsLength & 3)
+        write(OutFile, &Zeros, 4-(SavedArgsLength&3));
+    }
+  }
+ 
+  /* Write out this record! */
+  PTy = PT;
+  write(OutFile, &PTy, sizeof(int));
+  write(OutFile, &NumElements, sizeof(unsigned));
+  write(OutFile, Start, NumElements*sizeof(unsigned));
+}
diff --git a/runtime/libprofile/EdgeProfiling.c b/runtime/libprofile/EdgeProfiling.c
new file mode 100644
index 0000000..cf71766
--- /dev/null
+++ b/runtime/libprofile/EdgeProfiling.c
@@ -0,0 +1,45 @@
+/*===-- EdgeProfiling.c - Support library for edge profiling --------------===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|* 
+|*===----------------------------------------------------------------------===*|
+|* 
+|* This file implements the call back routines for the edge profiling
+|* instrumentation pass.  This should be used with the -insert-edge-profiling
+|* LLVM pass.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <stdlib.h>
+
+static unsigned *ArrayStart;
+static unsigned NumElements;
+
+/* EdgeProfAtExitHandler - When the program exits, just write out the profiling
+ * data.
+ */
+static void EdgeProfAtExitHandler() {
+  /* Note that if this were doing something more intelligent with the
+   * instrumentation, we could do some computation here to expand what we
+   * collected into simple edge profiles.  Since we directly count each edge, we
+   * just write out all of the counters directly.
+   */
+  write_profiling_data(EdgeInfo, ArrayStart, NumElements);
+}
+
+
+/* llvm_start_edge_profiling - This is the main entry point of the edge
+ * profiling library.  It is responsible for setting up the atexit handler.
+ */
+int llvm_start_edge_profiling(int argc, const char **argv,
+                              unsigned *arrayStart, unsigned numElements) {
+  int Ret = save_arguments(argc, argv);
+  ArrayStart = arrayStart;
+  NumElements = numElements;
+  atexit(EdgeProfAtExitHandler);
+  return Ret;
+}
diff --git a/runtime/libprofile/FunctionProfiling.c b/runtime/libprofile/FunctionProfiling.c
new file mode 100644
index 0000000..d030053
--- /dev/null
+++ b/runtime/libprofile/FunctionProfiling.c
@@ -0,0 +1,42 @@
+/*===-- FunctionProfiling.c - Support library for function profiling ------===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|* 
+|*===----------------------------------------------------------------------===*|
+|* 
+|* This file implements the call back routines for the function profiling
+|* instrumentation pass.  This should be used with the
+|* -insert-function-profiling LLVM pass.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <stdlib.h>
+
+static unsigned *ArrayStart;
+static unsigned NumElements;
+
+/* FuncProfAtExitHandler - When the program exits, just write out the profiling
+ * data.
+ */
+static void FuncProfAtExitHandler() {
+  /* Just write out the data we collected.
+   */
+  write_profiling_data(FunctionInfo, ArrayStart, NumElements);
+}
+
+
+/* llvm_start_func_profiling - This is the main entry point of the function
+ * profiling library.  It is responsible for setting up the atexit handler.
+ */
+int llvm_start_func_profiling(int argc, const char **argv,
+                              unsigned *arrayStart, unsigned numElements) {
+  int Ret = save_arguments(argc, argv);
+  ArrayStart = arrayStart;
+  NumElements = numElements;
+  atexit(FuncProfAtExitHandler);
+  return Ret;
+}
diff --git a/runtime/libprofile/Makefile b/runtime/libprofile/Makefile
new file mode 100644
index 0000000..e88fcdc
--- /dev/null
+++ b/runtime/libprofile/Makefile
@@ -0,0 +1,19 @@
+##===- runtime/libprofile/Makefile -------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+BYTECODE_LIBRARY = 1
+SHARED_LIBRARY = 1
+LOADABLE_MODULE = 1
+LIBRARYNAME = profile_rt
+EXTRA_DIST = exported_symbols.lst
+EXPORTED_SYMBOL_FILE = $(PROJ_SRC_DIR)/exported_symbols.lst
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+include $(LEVEL)/Makefile.common
diff --git a/runtime/libprofile/Profiling.h b/runtime/libprofile/Profiling.h
new file mode 100644
index 0000000..2c40489
--- /dev/null
+++ b/runtime/libprofile/Profiling.h
@@ -0,0 +1,31 @@
+/*===-- Profiling.h - Profiling support library support routines --*- C -*-===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|*
+|*===----------------------------------------------------------------------===*|
+|*
+|* This file defines functions shared by the various different profiling
+|* implementations.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#ifndef PROFILING_H
+#define PROFILING_H
+
+#include "llvm/Analysis/ProfileInfoTypes.h" /* for enum ProfilingType */
+
+/* save_arguments - Save argc and argv as passed into the program for the file
+ * we output.
+ */
+int save_arguments(int argc, const char **argv);
+
+/* write_profiling_data - Write out a typed packet of profiling data to the
+ * current output file.
+ */
+void write_profiling_data(enum ProfilingType PT, unsigned *Start,
+                          unsigned NumElements);
+
+#endif
diff --git a/runtime/libprofile/exported_symbols.lst b/runtime/libprofile/exported_symbols.lst
new file mode 100644
index 0000000..6f6c3cc
--- /dev/null
+++ b/runtime/libprofile/exported_symbols.lst
@@ -0,0 +1,5 @@
+
+llvm_start_func_profiling
+llvm_start_block_profiling
+llvm_start_basic_block_tracing
+llvm_trace_basic_block
diff --git a/runtime/libtrace/Makefile b/runtime/libtrace/Makefile
new file mode 100644
index 0000000..9a07070
--- /dev/null
+++ b/runtime/libtrace/Makefile
@@ -0,0 +1,18 @@
+##===- runtime/libtrace/Makefile ---------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by the LLVM research group and is distributed under
+# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+BYTECODE_LIBRARY = 1
+LIBRARYNAME = trace
+BYTECODE_DESTINATION = $(CFERuntimeLibDir)
+
+include $(LEVEL)/Makefile.common
+
+CompileCommonOpts := $(filter-out -pedantic,$(CompileCommonOpts))
+CompileCommonOpts := $(filter-out -Wno-long-long,$(CompileCommonOpts))
diff --git a/runtime/libtrace/README.txt b/runtime/libtrace/README.txt
new file mode 100644
index 0000000..80fee9b
--- /dev/null
+++ b/runtime/libtrace/README.txt
@@ -0,0 +1,2 @@
+These routines form the support library for the LLVM -trace and -tracem 
+instrumentation passes.
diff --git a/runtime/libtrace/tracelib.c b/runtime/libtrace/tracelib.c
new file mode 100644
index 0000000..be726f1
--- /dev/null
+++ b/runtime/libtrace/tracelib.c
@@ -0,0 +1,392 @@
+/*===-- tracelib.c - Runtime routines for tracing ---------------*- C++ -*-===*
+ *
+ * Runtime routines for supporting tracing of execution for code generated by
+ * LLVM.
+ *
+ *===----------------------------------------------------------------------===*/
+
+#include "tracelib.h"
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "llvm/Support/DataTypes.h"
+
+/*===---------------------------------------------------------------------=====
+ * HASH FUNCTIONS
+ *===---------------------------------------------------------------------===*/
+
+/* use #defines until we have inlining */
+typedef uintptr_t Index;                 /* type of keys, size for hash table */
+typedef uint32_t  Generic;               /* type of values stored in table */ 
+
+/* Index IntegerHashFunc(const Generic value, const Index size) */
+#define IntegerHashFunc(value, size) \
+  ( ((((Index) value) << 3) ^ (((Index) value) >> 3)) % size )
+
+/* Index IntegerRehashFunc(const Generic oldHashValue, const Index size) */
+#define IntegerRehashFunc(oldHashValue, size) \
+  ((Index) ((oldHashValue+16) % size)) /* 16 is relatively prime to a Mersenne prime! */
+
+/* Index PointerHashFunc(const void* value, const Index size) */
+#define PointerHashFunc(value, size) \
+  IntegerHashFunc((Index) value, size)
+
+/* Index PointerRehashFunc(const void* value, const Index size) */
+#define PointerRehashFunc(value, size) \
+  IntegerRehashFunc((Index) value, size)
+
+/*===---------------------------------------------------------------------=====
+ * POINTER-TO-GENERIC HASH TABLE.
+ * These should be moved to a separate location: HashTable.[ch]
+ *===---------------------------------------------------------------------===*/
+
+typedef enum { FIND, ENTER } ACTION;
+typedef char FULLEMPTY;
+const FULLEMPTY EMPTY = '\0';
+const FULLEMPTY FULL  = '\1';
+
+// List of primes closest to powers of 2 in [2^20 -- 2^30], obtained from
+// http://www.utm.edu/research/primes/lists/2small/0bit.html.
+// Use these as the successive sizes of the hash table.
+#define NUMPRIMES 11
+#define FIRSTENTRY 2
+const unsigned PRIMES[NUMPRIMES] = { (1<<20)-3,  (1<<21)-9,  (1<<22)-3, (1<<23)-15,
+                                 (1<<24)-3,  (1<<25)-39, (1<<26)-5, (1<<27)-39,
+                                 (1<<28)-57, (1<<29)-3,  (1<<30)-35 };
+unsigned CurrentSizeEntry = FIRSTENTRY;
+
+const unsigned MAX_NUM_PROBES = 4;
+
+typedef struct PtrValueHashEntry_struct {
+  void*   key;
+  Generic value;
+} PtrValueHashEntry;
+
+typedef struct PtrValueHashTable_struct {
+  PtrValueHashEntry* table;
+  FULLEMPTY* fullEmptyFlags;
+  Index capacity;
+  Index size;
+} PtrValueHashTable;
+
+
+static Generic LookupOrInsertPtr(PtrValueHashTable* ptrTable, void* ptr,
+                                 ACTION action, Generic value);
+
+static void Insert(PtrValueHashTable* ptrTable, void* ptr, Generic value);
+
+static void Delete(PtrValueHashTable* ptrTable, void* ptr);
+
+/* Returns 0 if the item is not found. */
+/* void* LookupPtr(PtrValueHashTable* ptrTable, void* ptr) */
+#define LookupPtr(ptrTable, ptr) \
+  LookupOrInsertPtr(ptrTable, ptr, FIND, (Generic) 0)
+
+void
+InitializeTable(PtrValueHashTable* ptrTable, Index newSize)
+{
+  ptrTable->table = (PtrValueHashEntry*) calloc(newSize,
+                                                sizeof(PtrValueHashEntry));
+  ptrTable->fullEmptyFlags = (FULLEMPTY*) calloc(newSize, sizeof(FULLEMPTY));
+  ptrTable->capacity = newSize;
+  ptrTable->size = 0;
+}
+
+PtrValueHashTable*
+CreateTable(Index initialSize)
+{
+  PtrValueHashTable* ptrTable =
+    (PtrValueHashTable*) malloc(sizeof(PtrValueHashTable));
+  InitializeTable(ptrTable, initialSize);
+  return ptrTable;
+}
+
+void
+ReallocTable(PtrValueHashTable* ptrTable, Index newSize)
+{
+  if (newSize <= ptrTable->capacity)
+    return;
+
+#ifndef NDEBUG
+  printf("\n***\n*** REALLOCATING SPACE FOR POINTER HASH TABLE.\n");
+  printf("*** oldSize = %ld, oldCapacity = %ld\n***\n\n",
+         (long) ptrTable->size, (long) ptrTable->capacity); 
+#endif
+
+  unsigned int i;
+  PtrValueHashEntry* oldTable = ptrTable->table;
+  FULLEMPTY* oldFlags = ptrTable->fullEmptyFlags; 
+  Index oldSize = ptrTable->size;
+  Index oldCapacity = ptrTable->capacity;
+  
+  /* allocate the new storage and flags and re-insert the old entries */
+  InitializeTable(ptrTable, newSize);
+  for (i=0; i < oldCapacity; ++i)
+    if (oldFlags[i] == FULL)
+      Insert(ptrTable, oldTable[i].key, oldTable[i].value);
+
+  assert(ptrTable->size == oldSize && "Incorrect number of entries copied?");
+
+#ifndef NDEBUG
+  for (i=0; i < oldCapacity; ++i)
+    if (oldFlags[i] == FULL)
+      assert(LookupPtr(ptrTable, oldTable[i].key) == oldTable[i].value);
+#endif
+  
+  free(oldTable);
+  free(oldFlags);
+}
+
+void
+DeleteTable(PtrValueHashTable* ptrTable)
+{
+  free(ptrTable->table);
+  free(ptrTable->fullEmptyFlags);
+  memset(ptrTable, '\0', sizeof(PtrValueHashTable));
+  free(ptrTable);
+}
+
+void
+InsertAtIndex(PtrValueHashTable* ptrTable, void* ptr, Generic value, Index index)
+{
+  assert(ptrTable->fullEmptyFlags[index] == EMPTY && "Slot is in use!");
+  ptrTable->table[index].key = ptr; 
+  ptrTable->table[index].value = value; 
+  ptrTable->fullEmptyFlags[index] = FULL;
+  ptrTable->size++;
+}
+
+void
+DeleteAtIndex(PtrValueHashTable* ptrTable, Index index)
+{
+  assert(ptrTable->fullEmptyFlags[index] == FULL && "Deleting empty slot!");
+  ptrTable->table[index].key = 0; 
+  ptrTable->table[index].value = (Generic) 0; 
+  ptrTable->fullEmptyFlags[index] = EMPTY;
+  ptrTable->size--;
+}
+
+Index
+FindIndex(PtrValueHashTable* ptrTable, void* ptr)
+{
+  unsigned numProbes = 1;
+  Index index = PointerHashFunc(ptr, ptrTable->capacity);
+  if (ptrTable->fullEmptyFlags[index] == FULL)
+    {
+      if (ptrTable->table[index].key == ptr)
+        return index;
+      
+      /* First lookup failed on non-empty slot: probe further */
+      while (numProbes < MAX_NUM_PROBES)
+        {
+          index = PointerRehashFunc(index, ptrTable->capacity);
+          if (ptrTable->fullEmptyFlags[index] == EMPTY)
+            break;
+          else if (ptrTable->table[index].key == ptr)
+            return index;
+          ++numProbes;
+        }
+    }
+  
+  /* Lookup failed: item is not in the table. */
+  /* If last slot is empty, use that slot. */
+  /* Otherwise, table must have been reallocated, so search again. */
+  
+  if (numProbes == MAX_NUM_PROBES)
+    { /* table is too full: reallocate and search again */
+      if (CurrentSizeEntry >= NUMPRIMES-1) {
+        fprintf(stderr, "Out of PRIME Numbers!!!");
+        abort();
+      }
+      ReallocTable(ptrTable, PRIMES[++CurrentSizeEntry]);
+      return FindIndex(ptrTable, ptr);
+    }
+  else
+    {
+      assert(ptrTable->fullEmptyFlags[index] == EMPTY &&
+             "Stopped before finding an empty slot and before MAX probes!");
+      return index;
+    }
+}
+
+/* Look up hash table using 'ptr' as the key.  If an entry exists, return
+ * the value mapped to 'ptr'.  If not, and if action==ENTER is specified,
+ * create a new entry with value 'value', but return 0 in any case.
+ */
+Generic
+LookupOrInsertPtr(PtrValueHashTable* ptrTable, void* ptr, ACTION action,
+                  Generic value)
+{
+  Index index = FindIndex(ptrTable, ptr);
+  if (ptrTable->fullEmptyFlags[index] == FULL &&
+      ptrTable->table[index].key == ptr)
+    return ptrTable->table[index].value;
+  
+  /* Lookup failed: item is not in the table */
+  /* If action is ENTER, insert item into the table.  Return 0 in any case. */ 
+  if (action == ENTER)
+    InsertAtIndex(ptrTable, ptr, value, index);
+
+  return (Generic) 0;
+}
+
+void
+Insert(PtrValueHashTable* ptrTable, void* ptr, Generic value)
+{
+  Index index = FindIndex(ptrTable, ptr);
+  assert(ptrTable->fullEmptyFlags[index] == EMPTY &&
+         "ptr is already in the table: delete it first!");
+  InsertAtIndex(ptrTable, ptr, value, index);
+}
+
+void
+Delete(PtrValueHashTable* ptrTable, void* ptr)
+{
+  Index index = FindIndex(ptrTable, ptr);
+  if (ptrTable->fullEmptyFlags[index] == FULL &&
+      ptrTable->table[index].key == ptr)
+    {
+      DeleteAtIndex(ptrTable, index);
+    }
+}
+
+/*===---------------------------------------------------------------------=====
+ * RUNTIME ROUTINES TO MAP POINTERS TO SEQUENCE NUMBERS
+ *===---------------------------------------------------------------------===*/
+
+PtrValueHashTable* SequenceNumberTable = NULL;
+#define INITIAL_SIZE (PRIMES[FIRSTENTRY])
+
+#define MAX_NUM_SAVED 1024
+
+typedef struct PointerSet_struct {
+  char* savedPointers[MAX_NUM_SAVED];   /* 1024 alloca'd ptrs shd suffice */
+  unsigned int numSaved;
+  struct PointerSet_struct* nextOnStack;     /* implement a cheap stack */ 
+} PointerSet;
+
+PointerSet* topOfStack = NULL;
+
+SequenceNumber
+HashPointerToSeqNum(char* ptr)
+{
+  static SequenceNumber count = 0;
+  SequenceNumber seqnum;
+  if (SequenceNumberTable == NULL) {
+    assert(MAX_NUM_PROBES < INITIAL_SIZE+1 && "Initial size too small");
+    SequenceNumberTable = CreateTable(INITIAL_SIZE);
+  }
+  seqnum = (SequenceNumber)
+    LookupOrInsertPtr(SequenceNumberTable, ptr, ENTER, count+1);
+
+  if (seqnum == 0)    /* new entry was created with value count+1 */
+    seqnum = ++count;    /* so increment counter */
+
+  assert(seqnum <= count && "Invalid sequence number in table!");
+  return seqnum;
+}
+
+void
+ReleasePointerSeqNum(char* ptr)
+{ /* if a sequence number was assigned to this ptr, release it */
+  if (SequenceNumberTable != NULL)
+    Delete(SequenceNumberTable, ptr);
+}
+
+void
+PushPointerSet()
+{
+  PointerSet* newSet = (PointerSet*) malloc(sizeof(PointerSet));
+  newSet->numSaved = 0;
+  newSet->nextOnStack = topOfStack;
+  topOfStack = newSet;
+}
+
+void
+PopPointerSet()
+{
+  PointerSet* oldSet;
+  assert(topOfStack != NULL && "popping from empty stack!");
+  oldSet = topOfStack; 
+  topOfStack = oldSet->nextOnStack;
+  assert(oldSet->numSaved == 0);
+  free(oldSet);
+}
+
+/* free the pointers! */
+static void
+ReleaseRecordedPointers(char* savedPointers[MAX_NUM_SAVED],
+                        unsigned int numSaved)
+{
+  unsigned int i;
+  for (i=0; i < topOfStack->numSaved; ++i)
+    ReleasePointerSeqNum(topOfStack->savedPointers[i]);  
+}
+
+void
+ReleasePointersPopSet()
+{
+  ReleaseRecordedPointers(topOfStack->savedPointers, topOfStack->numSaved);
+  topOfStack->numSaved = 0;
+  PopPointerSet();
+}
+
+void
+RecordPointer(char* ptr)
+{ /* record pointers for release later */
+  if (topOfStack->numSaved == MAX_NUM_SAVED) {
+    printf("***\n*** WARNING: OUT OF ROOM FOR SAVED POINTERS."
+           " ALL POINTERS ARE BEING FREED.\n"
+           "*** THE SEQUENCE NUMBERS OF SAVED POINTERS WILL CHANGE!\n*** \n");
+    ReleaseRecordedPointers(topOfStack->savedPointers, topOfStack->numSaved);
+    topOfStack->numSaved = 0;
+  }
+  topOfStack->savedPointers[topOfStack->numSaved++] = ptr;
+}
+
+/*===---------------------------------------------------------------------=====
+ * TEST DRIVER FOR INSTRUMENTATION LIBRARY
+ *===---------------------------------------------------------------------===*/
+
+#ifndef TEST_INSTRLIB
+#undef  TEST_INSTRLIB /* #define this to turn on by default */
+#endif
+
+#ifdef TEST_INSTRLIB
+int
+main(int argc, char** argv)
+{
+  int i, j;
+  int doRelease = 0;
+
+  INITIAL_SIZE = 5; /* start with small table to test realloc's*/
+  
+  if (argc > 1 && ! strcmp(argv[1], "-r"))
+    {
+      PushPointerSet();
+      doRelease = 1;
+    }
+  
+  for (i=0; i < argc; ++i)
+    for (j=0; argv[i][j]; ++j)
+      {
+        printf("Sequence number for argc[%d][%d] (%c) = Hash(%p) = %d\n",
+               i, j, argv[i][j], argv[i]+j, HashPointerToSeqNum(argv[i]+j));
+        
+        if (doRelease)
+          RecordPointer(argv[i]+j);
+      }
+  
+  if (doRelease)
+    ReleasePointersPopSet();     
+  
+  /* print sequence numbers out again to compare with (-r) and w/o release */
+  for (i=argc-1; i >= 0; --i)
+    for (j=0; argv[i][j]; ++j)
+      printf("Sequence number for argc[%d][%d] (%c) = %d\n",
+             i, j, argv[i][j], argv[i]+j, HashPointerToSeqNum(argv[i]+j));
+  
+  return 0;
+}
+#endif
diff --git a/runtime/libtrace/tracelib.h b/runtime/libtrace/tracelib.h
new file mode 100644
index 0000000..a60697a
--- /dev/null
+++ b/runtime/libtrace/tracelib.h
@@ -0,0 +1,40 @@
+/*===-- Libraries/tracelib.h - Runtime routines for tracing -----*- C++ -*--===
+ *
+ * Runtime routines for supporting tracing of execution
+ * for code generated by LLVM.
+ *
+ *===---------------------------------------------------------------------===*/
+
+#ifndef _TEST_LIBRARIES_LIBINSTR_TRACELIB_
+#define _TEST_LIBRARIES_LIBINSTR_TRACELIB_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/types.h>
+
+/*===---------------------------------------------------------------------=====
+ * Support for tracing pointers
+ *===---------------------------------------------------------------------===*/
+
+typedef unsigned int SequenceNumber;
+
+extern SequenceNumber HashPointerToSeqNum( char* ptr);
+
+extern void           ReleasePointerSeqNum(char* ptr);
+
+extern void           RecordPointer(char* ptr);
+
+extern void           PushPointerSet();
+
+extern void           ReleasePointersPopSet();
+
+
+#ifdef __cplusplus
+}
+#endif
+
+/*===---------------------------------------------------------------------===*/
+
+#endif