diff -r f6590b6e5e97 -r 25fa80338f92 common/autoconf/flags.m4
--- a/common/autoconf/flags.m4	Mon Feb 22 11:22:55 2016 +0100
+++ b/common/autoconf/flags.m4	Mon Feb 22 11:27:09 2016 +0100
@@ -123,12 +123,16 @@
 [
   # COMPILER_TARGET_BITS_FLAG  : option for selecting 32- or 64-bit output
   # COMPILER_COMMAND_FILE_FLAG : option for passing a command file to the compiler
+  # COMPILER_BINDCMD_FILE_FLAG : option for specifying a file which saves the binder
+  #                              commands produced by the link step (currently AIX only)
   if test "x$TOOLCHAIN_TYPE" = xxlc; then
     COMPILER_TARGET_BITS_FLAG="-q"
     COMPILER_COMMAND_FILE_FLAG="-f"
+    COMPILER_BINDCMD_FILE_FLAG="-bloadmap:"
   else
     COMPILER_TARGET_BITS_FLAG="-m"
     COMPILER_COMMAND_FILE_FLAG="@"
+    COMPILER_BINDCMD_FILE_FLAG=""
 
     # The solstudio linker does not support @-files.
     if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
@@ -152,6 +156,7 @@
   fi
   AC_SUBST(COMPILER_TARGET_BITS_FLAG)
   AC_SUBST(COMPILER_COMMAND_FILE_FLAG)
+  AC_SUBST(COMPILER_BINDCMD_FILE_FLAG)
 
   # FIXME: figure out if we should select AR flags depending on OS or toolchain.
   if test "x$OPENJDK_TARGET_OS" = xmacosx; then
@@ -294,10 +299,23 @@
     SET_SHARED_LIBRARY_NAME='-h [$]1'
     SET_SHARED_LIBRARY_MAPFILE='-M[$]1'
   elif test "x$TOOLCHAIN_TYPE" = xxlc; then
-    PICFLAG="-qpic=large"
+    # '-qpic' defaults to 'qpic=small'. This means that the compiler generates only
+    # one instruction for accessing the TOC. If the TOC grows larger than 64K, the linker
+    # will have to patch this single instruction with a call to some out-of-order code which
+    # does the load from the TOC. This is of course slow. But in that case we also would have
+    # to use '-bbigtoc' for linking anyway so we could also change the PICFLAG to 'qpic=large'.
+    # With 'qpic=large' the compiler will by default generate a two-instruction sequence which
+    # can be patched directly by the linker and does not require a jump to out-of-order code.
+    # Another alternative instead of using 'qpic=large -bbigtoc' may be to use '-qminimaltoc'
+    # instead. This creates a distinct TOC for every compilation unit (and thus requires two
+    # loads for accessing a global variable). But there are rumors that this may be seen as a
+    # 'performance feature' because of improved code locality of the symbols used in a
+    # compilation unit.
+    PICFLAG="-qpic"
+    JVM_CFLAGS="$JVM_CFLAGS $PICFLAG"
     C_FLAG_REORDER=''
     CXX_FLAG_REORDER=''
-    SHARED_LIBRARY_FLAGS="-qmkshrobj"
+    SHARED_LIBRARY_FLAGS="-qmkshrobj -bM:SRE -bnoentry"
     SET_EXECUTABLE_ORIGIN=""
     SET_SHARED_LIBRARY_ORIGIN=''
     SET_SHARED_LIBRARY_NAME=''
@@ -835,7 +853,7 @@
     LDFLAGS_CXX_SOLSTUDIO="-norunpath"
     LDFLAGS_CXX_JDK="$LDFLAGS_CXX_JDK $LDFLAGS_CXX_SOLSTUDIO -xnolib"
   elif test "x$TOOLCHAIN_TYPE" = xxlc; then
-    LDFLAGS_XLC="-brtl -bnolibpath -bexpall -bernotok"
+    LDFLAGS_XLC="-b64 -brtl -bnolibpath -bexpall -bernotok"
     LDFLAGS_JDK="${LDFLAGS_JDK} $LDFLAGS_XLC"
   fi