[PATCH] Ensure count_scale is no larger than REG_BR_PROB_BASE

[Dehao Chen]

Is this patch ok for trunk? Bootstrapped and regression test on-going.

Thanks,
Dehao

2014-05-16  Dehao Chen  <de...@google.com>

        * tree-inline.c (initialize_cfun): Ensure count_scale is no larger
        than REG_BR_PROB_BASE.
        (copy_cfg_body): Likewise.

Index: gcc/tree-inline.c
===================================================================
--- gcc/tree-inline.c (revision 210535)
+++ gcc/tree-inline.c (working copy)
@@ -2190,7 +2190,8 @@ initialize_cfun (tree new_fndecl, tree callee_fnde
   if (!DECL_RESULT (new_fndecl))
     DECL_RESULT (new_fndecl) = DECL_RESULT (callee_fndecl);

-  if (ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count)
+  if (ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count
+      && count < ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count)
     count_scale
         = GCOV_COMPUTE_SCALE (count,
                               ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count);
@@ -2451,7 +2452,8 @@ copy_cfg_body (copy_body_data * id, gcov_type coun
       freqs_to_counts (id->src_node, count > in_count ? count : in_count);
     }

-  if (ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count)
+  if (ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count
+      && count < ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count)
     count_scale
         = GCOV_COMPUTE_SCALE (count,
                               ENTRY_BLOCK_PTR_FOR_FN (src_cfun)->count);