[Bug gcov-profile/59527] [4.9 Regression] ICE: in fixup_reorder_chain, at cfgrtl.c:3739 during PGO Firefox build

[octoploid at yandex dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59527

--- Comment #1 from Markus Trippelsdorf <octoploid at yandex dot com> ---
Created attachment 31447
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31447&action=edit
unreduced testcase

 % g++ -w -r -nostdlib -fprofile-use -fprofile-correction -march=amdfam10
-fno-exceptions -std=gnu++0x -O3 test.ii
In file included from /var/tmp/moz-build-dir/js/src/Unified_cpp_9.cpp:101:0:
/var/tmp/mozilla-central/js/src/vm/Stack.cpp: In member function
‘js::ScriptFrameIter& js::ScriptFrameIter::operator++()’:
/var/tmp/mozilla-central/js/src/vm/Stack.cpp:717:1: internal compiler error: in
fixup_reorder_chain, at cfgrtl.c:3739