[PATCH x86, pr63534] Fix go bootstrap

[Evgeny Stupachenko]

Hi,

Bootstaped with --enable-languages=c,c++,fortran,lto,go passed.
Make check in progress.

Is it ok?

ChangeLog

2014-10-14  Evgeny Stupachenko  <evstu...@gmail.com>

        * config/i386/i386.c (ix86_expand_split_stack_prologue): Make
        __morestack calls local.

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index a3ca2ed..5117572 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -11999,7 +11999,10 @@ ix86_expand_split_stack_prologue (void)
                    REG_BR_PROB_BASE - REG_BR_PROB_BASE / 100);

   if (split_stack_fn == NULL_RTX)
-    split_stack_fn = gen_rtx_SYMBOL_REF (Pmode, "__morestack");
+    {
+      split_stack_fn = gen_rtx_SYMBOL_REF (Pmode, "__morestack");
+      SYMBOL_REF_FLAGS (split_stack_fn) |= SYMBOL_FLAG_LOCAL;
+    }
   fn = split_stack_fn;

   /* Get more stack space.  We pass in the desired stack space and the
@@ -12044,9 +12047,11 @@ ix86_expand_split_stack_prologue (void)
          gcc_assert ((args_size & 0xffffffff) == args_size);

          if (split_stack_fn_large == NULL_RTX)
-           split_stack_fn_large =
-             gen_rtx_SYMBOL_REF (Pmode, "__morestack_large_model");
-
+           {
+             split_stack_fn_large =
+               gen_rtx_SYMBOL_REF (Pmode, "__morestack_large_model");
+             SYMBOL_REF_FLAGS (split_stack_fn_large) |= SYMBOL_FLAG_LOCAL;
+           }
          if (ix86_cmodel == CM_LARGE_PIC)
            {
              rtx_code_label *label;