[Bug target/63702] New: i386.c:36276: possible missing break ?

[Bug target/63702] New: i386.c:36276: possible missing break ?

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63702

            Bug ID: 63702
           Summary: i386.c:36276: possible missing break ?
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

[gcc/config/i386/i386.c:36276] -> [gcc/config/i386/i386.c:36338]: (warning)
Vari
able 'nargs' is reassigned a value before the old one has been used. 'break;'
mi
ssing?

    case QI_FTYPE_V4DI_V4DI_QI:
    case V4SF_FTYPE_V2DF_V4SF_QI:
    case V4SF_FTYPE_V4DF_V4SF_QI:
       nargs = 3;
    case V16SI_FTYPE_V16SI_V16SI_HI:
    case V16SI_FTYPE_V16SI_V16SI_V16SI:
    case V16SI_FTYPE_V4SI_V16SI_HI:

[Bug target/63702] i386.c:36276: possible missing break ?

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63702

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to David Binderman from comment #0)
> [gcc/config/i386/i386.c:36276] -> [gcc/config/i386/i386.c:36338]: (warning)
> Vari
> able 'nargs' is reassigned a value before the old one has been used.
> 'break;' mi
> ssing?
> 
>     case QI_FTYPE_V4DI_V4DI_QI:
>     case V4SF_FTYPE_V2DF_V4SF_QI:
>     case V4SF_FTYPE_V4DF_V4SF_QI:
>        nargs = 3;
>     case V16SI_FTYPE_V16SI_V16SI_HI:
>     case V16SI_FTYPE_V16SI_V16SI_V16SI:
>     case V16SI_FTYPE_V4SI_V16SI_HI:

No, this assignment should just be removed. I'll take care for this.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc620

--- Comment #21 from Jeffrey A. Law <law at redhat dot com> ---
Uros,

Any objection to installing that patch to work around these problems while Vlad
works on things from the rematerialization side?

Perhaps put that condition in a function which makes it clear that this is just
a workaround to give Vlad time to build out the real solution?

[Bug target/63702] i386.c:36276: possible missing break ?

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63702

--- Comment #2 from uros at gcc dot gnu.org ---
Author: uros
Date: Fri Oct 31 21:56:05 2014
New Revision: 216991

URL: https://gcc.gnu.org/viewcvs?rev=216991&root=gcc&view=rev
Log:
    PR target/63702
    * config/i386/i386.c (ix86_expand_args_builtin): Remove extra
    assignment to 'nargs' variable.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c

[Bug target/63702] i386.c:36276: possible missing break ?

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63702

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |5.0

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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Subject: [Bug bootstrap/63703] [4.9.2 Regression] cc1: internal compiler error: in init_reg_sets, at reginfo.c:178
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc703

Denis Excoffier <gcc@Denis-Excoffier.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gcc@Denis-Excoffier.org

--- Comment #4 from Denis Excoffier <gcc@Denis-Excoffier.org> ---
Me too.

Invocation command line is:

% /tmp/lcl/tmp/gcc/gcc-4.9.2/configure --prefix=/tmp/lcl/uxl/gcc-4.9.2
--disable-multilib --with-local-prefix=/usr/local/nonexistent
--enable-languages=c,c++

And compiler is:
% gcc --version
powerpc-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5493)
Copyright (C) 2005 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Near the beginning of config.log, something that could be important:

-----------
/usr/bin/hostinfo      = Mach kernel version:
   Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009;
root:xnu-1228.15.4~1/RELEASE_PPC
Kernel configured for a single processor only.
1 processor is physically available.
1 processor is logically available.
Processor type: ppc7450 (PowerPC 7450)
Processor active: 0
Primary memory available: 1.00 gigabytes
Default processor set: 53 tasks, 178 threads, 1 processors
----------

I commented out the gcc_assert at line 178. It then continues a little, until
in
powerpc-apple-darwin9.8.0/libstdc++-v3 (still stage 1), with an another ICE
(Bus error) in guard.cc:114:28.

I also confirm that 4.9.1 compiles (and runs) ok.