[Bug tree-optimization/34723] [4.7/4.8/4.9 Regression] Summing variable should be initialized to the first member before the loop

["ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34723

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.4
>From gcc-bugs-return-437761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 16 18:41:17 2013
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From: "tejohnson at google dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/59527] [4.9 Regression] ICE: in fixup_reorder_chain, at cfgrtl.c:3739 during PGO Firefox build
Date: Mon, 16 Dec 2013 18:41:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59527

--- Comment #2 from Teresa Johnson <tejohnson at google dot com> ---
I will take a look and report back. -freorder-blocks-and-partition was
recently enabled by default, which presumably exposed this issue.
Thanks,
Teresa

On Mon, Dec 16, 2013 at 8:21 AM, octoploid at yandex dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
> 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
>
> --
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>From gcc-bugs-return-437762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 16 18:55:55 2013
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Subject: [Bug libstdc++/59436] [4.9 Regression] FAIL: 17_intro/headers/c++200x/stdc++.cc (test for excess errors)
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY436

--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #11)
> It is PCH related. Stage1 and stage2 cc1plus can compile the same input.
> But stage3 cc1plus fails.

It is very sensitive PCH load address.