http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55792
--- Comment #23 from H.J. Lu <hjl.tools at gmail dot com> 2013-01-09 22:51:36
UTC ---
The old BLOCK came from
(gdb) bt
#0 remap_block (block=0x7fffffffd690, id=0x7fffffffd840) at
/export/gnu/import/git/gcc/gcc/tree-inline.c:624
#1 0x00000000009fe52a in remap_blocks (block=0x7ffff1393d20,
id=0x7fffffffd840)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:645
#2 0x00000000009fe586 in remap_blocks (block=0x7ffff1385370,
id=0x7fffffffd840)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:648
#3 0x00000000009fe586 in remap_blocks (block=0x7ffff1385320,
id=0x7fffffffd840)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:648
---Type <return> to continue, or q <return> to quit---
#4 0x00000000009fe586 in remap_blocks (block=0x7ffff1385280,
id=0x7fffffffd840)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:648
#5 0x00000000009fe586 in remap_blocks (block=0x7ffff13851e0,
id=0x7fffffffd840)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:648
#6 0x0000000000a0bc63 in tree_function_versioning (old_decl=0x7fffec94b400,
new_decl=0x7fffe9105000, tree_map=0x0,
update_clones=true, args_to_skip=0x0, skip_return=false,
blocks_to_copy=0x0, new_entry=0x0)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:5225
---Type <return> to continue, or q <return> to quit---
#7 0x00000000007d2d05 in save_inline_function_body (node=0x7ffff1753818)
at /export/gnu/import/git/gcc/gcc/ipa-inline-transform.c:354
#8 0x00000000007d2ec6 in inline_transform (node=0x7ffff1753818) at
/export/gnu/import/git/gcc/gcc/ipa-inline-transform.c:411
#9 0x00000000008adbe3 in execute_one_ipa_transform_pass (node=0x7ffff1753818,
ipa_pass=0x16cfc80 <pass_ipa_inline>)
at /export/gnu/import/git/gcc/gcc/passes.c:2177
#10 0x00000000008add31 in execute_all_ipa_transforms () at
/export/gnu/import/git/gcc/gcc/passes.c:2213
#11 0x00000000005da348 in expand_function (node=0x7ffff1753818) at
/export/gnu/import/git/gcc/gcc/cgraphunit.c:1634
---Type <return> to continue, or q <return> to quit---
#12 0x00000000005da821 in expand_all_functions () at
/export/gnu/import/git/gcc/gcc/cgraphunit.c:1745
#13 0x00000000005db2ab in compile () at
/export/gnu/import/git/gcc/gcc/cgraphunit.c:2043
#14 0x000000000053c60a in lto_main () at
/export/gnu/import/git/gcc/gcc/lto/lto.c:3390
#15 0x0000000000999401 in compile_file () at
/export/gnu/import/git/gcc/gcc/toplev.c:545
#16 0x000000000099b3e4 in do_compile () at
/export/gnu/import/git/gcc/gcc/toplev.c:1878
#17 0x000000000099b54f in toplev_main (argc=28, argv=0x7fffffffdc78) at
/export/gnu/import/git/gcc/gcc/toplev.c:1954
#18 0x0000000000fff958 in main (argc=28, argv=0x7fffffffdc78) at
/export/gnu/import/git/gcc/gcc/main.c:36
(gdb) p id->block
$90 = (tree) 0x0
