[Bug target/43799] New: -fschedule-insns breaks vararg functions in recent builds

[Bug target/43799] New: -fschedule-insns breaks vararg functions in recent builds

[zsojka at seznam dot cz]

Command line:
gcc -fschedule-insns testcase-1.c && ./a.out
gcc -O[123s] -fschedule-insns testcase-2.c && ./a.out

Tested revisions:
r158486 - fail
r158225 - OK
4.5 r158486 - OK

Compiler output:
$ /mnt/svn/gcc-trunk/binary-158486-lto-fortran/bin/gcc -O3 -fschedule-insns
testcase.c && ./a.out
Aborted


-- 
           Summary: -fschedule-insns breaks vararg functions in recent
                    builds
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] -fschedule-insns breaks vararg functions in recent builds

[hjl dot tools at gmail dot com]

------- Comment #1 from hjl dot tools at gmail dot com  2010-04-19 14:06 -------
Testcase?


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] -fschedule-insns breaks vararg functions in recent builds

[zsojka at seznam dot cz]

------- Comment #2 from zsojka at seznam dot cz  2010-04-19 14:10 -------
Created an attachment (id=20416)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20416&action=view)
reduced testcase (from gcc.c-torture/execute/stdarg-2.c)

Command line:
$ gcc -fschedule-insns pr43799.c && ./a.out
Aborted


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
             Status|WAITING                     |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2010-04-19 14:11:59
               date|                            |
            Summary|-fschedule-insns breaks     |[4.6 Regression] -fschedule-
                   |vararg functions in recent  |insns breaks vararg
                   |builds                      |functions in recent builds
   Target Milestone|---                         |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[zsojka at seznam dot cz]

------- Comment #3 from zsojka at seznam dot cz  2010-04-19 14:14 -------
Created an attachment (id=20417)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20417&action=view)
reduced testcase (from gcc.c-torture/execute/stdarg-4.c)

Command line:
$ gcc -O3 -fschedule-insns pr43799-2.c && ./a.out
Aborted
Fails at all -O[123s] levels.

At least with -O3 -fschedule-insns, this check:
        cmp     edi, 5  # i,
is missing in the generated code


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[zsojka at seznam dot cz]

------- Comment #4 from zsojka at seznam dot cz  2010-04-19 14:23 -------
Created an attachment (id=20418)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20418&action=view)
list of testsuite failures (gcc, g++, fortran)

$ make check RUNTESTFLAGS="--target_board=unix/-fschedule-insns"
$ grep '^FAIL:' gcc/testsuite/*/*.log | grep ' exec'

It's possible not all these failures are related to this PR.

4.5 r158486 passes the run without any execution failure.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[hjl dot tools at gmail dot com]

------- Comment #5 from hjl dot tools at gmail dot com  2010-04-19 18:03 -------
It is caused by revision 158483:

http://gcc.gnu.org/ml/gcc-cvs/2010-04/msg00589.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[hjl dot tools at gmail dot com]

------- Comment #6 from hjl dot tools at gmail dot com  2010-05-04 18:20 -------
A patch is posted at

http://gcc.gnu.org/ml/gcc-patches/2010-05/msg00247.html


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hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2010-
                   |                            |05/msg00247.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[hjl at gcc dot gnu dot org]

------- Comment #7 from hjl at gcc dot gnu dot org  2010-05-04 18:51 -------
Subject: Bug 43799

Author: hjl
Date: Tue May  4 18:51:29 2010
New Revision: 159040

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159040
Log:
Add clobber CC register to sse_prologue_save patterns.

gcc/

2010-05-04  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/43799
        * config/i386/i386.md (sse_prologue_save): Add clobber CC
        register.
        (*sse_prologue_save_insn1): Likewise.
        (SSE prologue save splitter): Likewise.

gcc/testsuite/

2010-05-04  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/43799
        * gcc.target/i386/pr43799.c: New.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr43799.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799

[Bug target/43799] [4.6 Regression] -fschedule-insns breaks vararg functions in recent builds

[hjl dot tools at gmail dot com]

------- Comment #8 from hjl dot tools at gmail dot com  2010-05-04 18:52 -------
Fixed.


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43799