[Bug bootstrap/66448] [6 Regression] Bootstrap fails on darwin after r224161

["aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66448

Aldy Hernandez <aldyh at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org

--- Comment #2 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---

> 2. Once (1) is fixed, bootstrap then fails with:
> 
> /GCC/gcc-trunk/gcc/ipa-pure-const.c:1640:1: error:
> ‘{anonymous}::pass_ipa_pure_const::pass_ipa_pure_const(gcc::context*)’
> defined but not used [-Werror=unused-function]
>  pass_ipa_pure_const::
> 
> A --disable-werror boostrap completes, but there are a number of
> constructors and destructors that report "declared but not used". AFAICT,
> it's only constructors/destructors.
> 
> This is occurring at stage #2, and I thought maybe that the stage#1 compiler
> could have been mis-compiled by the bootstrap; however, gcc-4.9, 5.1 and
> clang (xcode 5.1.1) bootstraps all give the same result.

Jason, is pass_ipa_pure_const::pass_ipa_pure_const() really declared but not
used?

If so, can we mark it ATTRIBUTE_UNSUED or is there a more generic way of fixing
this?
>From gcc-bugs-return-488280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 07 12:42:39 2015
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Subject: [Bug bootstrap/66448] [6 Regression] Bootstrap fails on darwin after r224161
Date: Sun, 07 Jun 2015 12:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66448

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Aldy Hernandez from comment #2)
> > 2. Once (1) is fixed, bootstrap then fails with:
> > 
> > /GCC/gcc-trunk/gcc/ipa-pure-const.c:1640:1: error:
> > ‘{anonymous}::pass_ipa_pure_const::pass_ipa_pure_const(gcc::context*)’
> > defined but not used [-Werror=unused-function]
> >  pass_ipa_pure_const::
> > 
> > A --disable-werror boostrap completes, but there are a number of
> > constructors and destructors that report "declared but not used". AFAICT,
> > it's only constructors/destructors.
> > 
> > This is occurring at stage #2, and I thought maybe that the stage#1 compiler
> > could have been mis-compiled by the bootstrap; however, gcc-4.9, 5.1 and
> > clang (xcode 5.1.1) bootstraps all give the same result.
> 
> Jason, is pass_ipa_pure_const::pass_ipa_pure_const() really declared but not
> used?

I bet a drink that it is an incharge vs outofcharge construct/deconstruct
issue. Darwin does not support aliases so the function itself is cloned. 


> 
> If so, can we mark it ATTRIBUTE_UNSUED or is there a more generic way of
> fixing this?
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Subject: [Bug tree-optimization/66442] [6 regression] FAIL: gcc.dg/autopar/pr46885.c (test for excess errors)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf442

--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
Fixes the test case on m68k.