diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index aebb7d6ba80..abece9f0d9c 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -250,6 +250,11 @@ AC_CHECK_HEADER([inttypes.h],
                 [INCLUDE_INTTYPES_H='#include <inttypes.h>'],
                 [INCLUDE_INTTYPES_H=''])
 AC_SUBST(INCLUDE_INTTYPES_H)
+AC_CHECK_HEADER([stdint.h],
+                [INCLUDE_STDINT_H='#include <stdint.h>'],
+                [INCLUDE_STDINT_H=''])
+AC_SUBST(INCLUDE_STDINT_H)
+
 
 dnl Check for types
 AC_TYPE_PID_T
diff --git a/configure b/configure
index 59722c1b1aa..78935d9cf97 100755
--- a/configure
+++ b/configure
@@ -465,7 +465,7 @@ ac_includes_default="\
 #endif"
 
 ac_unique_file=""Makefile.config.in""
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS subdirs INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os OS LLVMGCCDIR ARCH CXX CXXFLAGS LDFLAGS CPPFLAGS ac_ct_CXX EXEEXT OBJEXT CC CFLAGS ac_ct_CC CPP ifGNUmake LEX LEXLIB LEX_OUTPUT_ROOT YACC BISON EGREP LN_S ECHO AR ac_ct_AR RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL DOT ETAGS ETAGSFLAGS PYTHON QMTEST HAVE_PTHREAD_MUTEX_LOCK INCLUDE_SYS_TYPES_H INCLUDE_INTTYPES_H ENDIAN HAVE_STD_EXT_HASH_MAP HAVE_GNU_EXT_HASH_MAP HAVE_GLOBAL_HASH_MAP HAVE_STD_EXT_HASH_SET HAVE_GNU_EXT_HASH_SET HAVE_GLOBAL_HASH_SET HAVE_STD_ITERATOR HAVE_BI_ITERATOR HAVE_FWD_ITERATOR ALLOCA MMAP_FILE ENABLE_OPTIMIZED SPEC95_ROOT USE_SPEC95 SPEC2000_ROOT USE_SPEC2000 POVRAY_ROOT USE_POVRAY UPB DISABLE_LLC_DIFFS JIT LLVMCC1 LLVMCC1PLUS BCR PAPIDIR SHLIBEXT LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS subdirs INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os OS LLVMGCCDIR ARCH CXX CXXFLAGS LDFLAGS CPPFLAGS ac_ct_CXX EXEEXT OBJEXT CC CFLAGS ac_ct_CC CPP ifGNUmake LEX LEXLIB LEX_OUTPUT_ROOT YACC BISON EGREP LN_S ECHO AR ac_ct_AR RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL DOT ETAGS ETAGSFLAGS PYTHON QMTEST HAVE_PTHREAD_MUTEX_LOCK INCLUDE_SYS_TYPES_H INCLUDE_INTTYPES_H INCLUDE_STDINT_H ENDIAN HAVE_STD_EXT_HASH_MAP HAVE_GNU_EXT_HASH_MAP HAVE_GLOBAL_HASH_MAP HAVE_STD_EXT_HASH_SET HAVE_GNU_EXT_HASH_SET HAVE_GLOBAL_HASH_SET HAVE_STD_ITERATOR HAVE_BI_ITERATOR HAVE_FWD_ITERATOR ALLOCA MMAP_FILE ENABLE_OPTIMIZED SPEC95_ROOT USE_SPEC95 SPEC2000_ROOT USE_SPEC2000 POVRAY_ROOT USE_POVRAY UPB DISABLE_LLC_DIFFS JIT LLVMCC1 LLVMCC1PLUS BCR PAPIDIR SHLIBEXT LIBOBJS LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -19342,6 +19342,144 @@ fi
 
 
 
+if test "${ac_cv_header_stdint_h+set}" = set; then
+  echo "$as_me:$LINENO: checking for stdint.h" >&5
+echo $ECHO_N "checking for stdint.h... $ECHO_C" >&6
+if test "${ac_cv_header_stdint_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_stdint_h" >&5
+echo "${ECHO_T}$ac_cv_header_stdint_h" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking stdint.h usability" >&5
+echo $ECHO_N "checking stdint.h usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <stdint.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_header_compiler=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking stdint.h presence" >&5
+echo $ECHO_N "checking stdint.h presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdint.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc in
+  yes:no )
+    { echo "$as_me:$LINENO: WARNING: stdint.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: stdint.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: stdint.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: stdint.h: proceeding with the preprocessor's result" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------ ##
+## Report this to bug-autoconf@gnu.org. ##
+## ------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+  no:yes )
+    { echo "$as_me:$LINENO: WARNING: stdint.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: stdint.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: stdint.h: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: stdint.h: check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: stdint.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: stdint.h: proceeding with the preprocessor's result" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------ ##
+## Report this to bug-autoconf@gnu.org. ##
+## ------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+echo "$as_me:$LINENO: checking for stdint.h" >&5
+echo $ECHO_N "checking for stdint.h... $ECHO_C" >&6
+if test "${ac_cv_header_stdint_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_header_stdint_h=$ac_header_preproc
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_stdint_h" >&5
+echo "${ECHO_T}$ac_cv_header_stdint_h" >&6
+
+fi
+if test $ac_cv_header_stdint_h = yes; then
+  INCLUDE_STDINT_H='#include <stdint.h>'
+else
+  INCLUDE_STDINT_H=''
+fi
+
+
+
+
 
 echo "$as_me:$LINENO: checking for pid_t" >&5
 echo $ECHO_N "checking for pid_t... $ECHO_C" >&6
@@ -21786,8 +21924,7 @@ _ACEOF
 
 
 
-
-for ac_func in getcwd gettimeofday strdup strtoq strtoll backtrace isatty mkstemp getrusage isnan
+for ac_func in getcwd gettimeofday strdup strtoq strtoll backtrace isatty mkstemp getrusage
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
 echo "$as_me:$LINENO: checking for $ac_func" >&5
@@ -23091,6 +23228,7 @@ s,@QMTEST@,$QMTEST,;t t
 s,@HAVE_PTHREAD_MUTEX_LOCK@,$HAVE_PTHREAD_MUTEX_LOCK,;t t
 s,@INCLUDE_SYS_TYPES_H@,$INCLUDE_SYS_TYPES_H,;t t
 s,@INCLUDE_INTTYPES_H@,$INCLUDE_INTTYPES_H,;t t
+s,@INCLUDE_STDINT_H@,$INCLUDE_STDINT_H,;t t
 s,@ENDIAN@,$ENDIAN,;t t
 s,@HAVE_STD_EXT_HASH_MAP@,$HAVE_STD_EXT_HASH_MAP,;t t
 s,@HAVE_GNU_EXT_HASH_MAP@,$HAVE_GNU_EXT_HASH_MAP,;t t
diff --git a/include/Support/DataTypes.h.in b/include/Support/DataTypes.h.in
index b1f14b26d50..180258478d3 100644
--- a/include/Support/DataTypes.h.in
+++ b/include/Support/DataTypes.h.in
@@ -33,6 +33,7 @@
 // Note that <inttypes.h> includes <stdint.h>, if this is a C99 system.
 @INCLUDE_INTTYPES_H@
 @INCLUDE_SYS_TYPES_H@
+@INCLUDE_STDINT_H@
 #else
 // Visual C++ doesn't provide standard integer headers, but it does provide
 // built-in data types.
diff --git a/include/llvm/Support/DataTypes.h.in b/include/llvm/Support/DataTypes.h.in
index b1f14b26d50..180258478d3 100644
--- a/include/llvm/Support/DataTypes.h.in
+++ b/include/llvm/Support/DataTypes.h.in
@@ -33,6 +33,7 @@
 // Note that <inttypes.h> includes <stdint.h>, if this is a C99 system.
 @INCLUDE_INTTYPES_H@
 @INCLUDE_SYS_TYPES_H@
+@INCLUDE_STDINT_H@
 #else
 // Visual C++ doesn't provide standard integer headers, but it does provide
 // built-in data types.