[Bug middle-end/53321] [4.8 Regression] LTO bootstrap failed with bootstrap-profiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53321

--- Comment #22 from H.J. Lu <hjl.tools at gmail dot com> 2012-07-06 18:46:09 UTC ---
After inlining, IPA calls tree_profiling which rebuilds edges:

#2  0x0000000000683ccd in rebuild_cgraph_edges ()
    at /export/gnu/import/git/gcc/gcc/cgraphbuild.c:433
#3  0x0000000000c02de6 in tree_profiling ()
    at /export/gnu/import/git/gcc/gcc/tree-profile.c:564
#4  0x0000000000a1be4f in execute_one_pass (pass=0x1908520)
    at /export/gnu/import/git/gcc/gcc/passes.c:2165
#5  0x0000000000a1cb0c in execute_ipa_pass_list (pass=0x1908520)
    at /export/gnu/import/git/gcc/gcc/passes.c:2532
#6  0x000000000068b874 in ipa_passes ()
    at /export/gnu/import/git/gcc/gcc/cgraphunit.c:1844

  basic_block bb; 
  struct cgraph_node *node = cgraph_get_node (current_function_decl);
  gimple_stmt_iterator gsi;

  cgraph_node_remove_callees (node);
  ipa_remove_all_references (&node->symbol.ref_list);

  node->count = ENTRY_BLOCK_PTR->count;

and creates new edges.  After that, all things went downhill

#0  internal_error (
    gmsgid=0x158c110 "vector %s %s domain error, in %s at %s:%u")
    at /export/gnu/import/git/gcc/gcc/diagnostic.c:955
#1  0x000000000124f707 in vec_assert_fail (op=0x12fc800 "index", 
    struct_name=0x12fc7e0 "VEC(inline_edge_summary_t,base)", 
    file=0x12fc808 "/export/gnu/import/git/gcc/gcc/ipa-inline.h", line=200, 
    function=0x12fd380 "inline_edge_summary")
    at /export/gnu/import/git/gcc/gcc/vec.c:527
#2  0x000000000067c685 in VEC_inline_edge_summary_t_base_index (
    vec_=0x1aea360, ix_=6, 
    file_=0x12fc808 "/export/gnu/import/git/gcc/gcc/ipa-inline.h", line_=200, 
    function_=0x12fd380 "inline_edge_summary")
    at /export/gnu/import/git/gcc/gcc/ipa-inline.h:145
#3  0x000000000067c6cd in inline_edge_summary (edge=0x7ffff1ab67b8)
    at /export/gnu/import/git/gcc/gcc/ipa-inline.h:199

since inline_edge_summary_vec was never updated.