[Bug rtl-optimization/44174] New: [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[Bug rtl-optimization/44174] New: [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[jakub at gcc dot gnu dot org]

/* { dg-do compile } */
/* { dg-options "-O2 -fpic" { target fpic } } */

int f0 (int, int, int, int, int);
int f1 (void);

void
f2 (void)
{
  unsigned v1, v2, v3, v4;
  __asm__ ("" : "=a" (v1), "=d" (v2), "=c" (v3), "=r" (v4));
  f0 (f1 (), f1 (), f1 (), f1 (), (v4 >> 8) & 0xff);
}
used to compile with -m32 -O2 -fpic in 4.3, but starting with 4.4 fails with:
/tmp/u.c: In function 'void f2()':
/tmp/u.c:11:60: error: can't find a register in class 'CLOBBERED_REGS' while
reloading 'asm'
/tmp/u.c:11:60: error: 'asm' operand has impossible constraints

while it should be fine to use esi or edi for that.


-- 
           Summary: [4.4/4.5/4.6 Regression] can't find a register in class
                    'CLOBBERED_REGS' while reloading 'asm'
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org
GCC target triplet: i686-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.4.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[vmakarov at redhat dot com]

------- Comment #1 from vmakarov at redhat dot com  2010-05-18 19:06 -------
  It will be fixed by IRA without cover classes which I am working on. The code
is planned to be included in gcc4.6.

  For older versions, it should be fixed in reload because I believe it is a
hidden reload bug.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2010-07-25 01:48 -------
Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-07-25 01:48:40
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2010-07-25 01:49 -------
*** Bug 44018 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lloyd at randombit dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[ro at CeBiTec dot Uni-Bielefeld.DE]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

--- Comment #15 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2012-01-24 12:55:38 UTC ---
> --- Comment #14 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-24 01:29:40 UTC ---
> Since this was fixed on the trunk, can you remove the xfail?

I already did so in April last year.

    Rainer

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.4/4.5/4.6/4.7            |[4.4/4.5/4.6 Regression]
                   |Regression] can't find a    |can't find a register in
                   |register in class           |class 'CLOBBERED_REGS'
                   |'CLOBBERED_REGS' while      |while reloading 'asm'
                   |reloading 'asm'             |

--- Comment #14 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-24 01:29:40 UTC ---
Since this was fixed on the trunk, can you remove the xfail?

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[dnovillo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

--- Comment #11 from Diego Novillo <dnovillo at gcc dot gnu.org> 2011-02-02 17:56:42 UTC ---
Author: dnovillo
Date: Wed Feb  2 17:56:39 2011
New Revision: 169645

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169645
Log:
    PR rtl-optimization/44174
    * gcc.target/i386/asm-6.c: New test.

Added:
    branches/google/integration/gcc/testsuite/gcc.target/i386/asm-6.c
Modified:
    branches/google/integration/gcc/testsuite/ChangeLog

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-01-28 14:29:30 UTC ---
> Ok for mainline (I'll post to gcc-patches anyway)?

Sure, thanks.

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[ro at CeBiTec dot Uni-Bielefeld.DE]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-01-28 13:04:36 UTC ---
> --- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-01-28 12:45:43 UTC ---
>> You're right: I somehow misread the PR and though the test had already
>> been introduced in november last year.
>
> It did pass with GCC 4.3 on Solaris too so this is a regression.  Can you XFAIL
> it on Solaris for the time being?

Sure.  The following patch does this:

2011-01-28  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

    * gcc.target/i386/asm-6.c: XFAIL on i?86-pc-solaris2.1[0-9] && ilp32.

diff -r a1670fd752ff gcc/testsuite/gcc.target/i386/asm-6.c
--- a/gcc/testsuite/gcc.target/i386/asm-6.c    Thu Jan 27 20:26:26 2011 +0100
+++ b/gcc/testsuite/gcc.target/i386/asm-6.c    Fri Jan 28 14:03:13 2011 +0100
@@ -3,6 +3,7 @@

 /* { dg-do compile } */
 /* { dg-options "-O2 -fpic" { target fpic } } */
+/* { dg-xfail-if "" { i?86-pc-solaris2.1[0-9] && ilp32 } } */

 int f0 (int, int, int, int, int);
 int f1 (void);

Ok for mainline (I'll post to gcc-patches anyway)?

    Rainer

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.4/4.5 Regression] can't  |[4.4/4.5/4.6 Regression]
                   |find a register in class    |can't find a register in
                   |'CLOBBERED_REGS' while      |class 'CLOBBERED_REGS'
                   |reloading 'asm'             |while reloading 'asm'

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-01-28 12:45:43 UTC ---
> You're right: I somehow misread the PR and though the test had already
> been introduced in november last year.

It did pass with GCC 4.3 on Solaris too so this is a regression.  Can you XFAIL
it on Solaris for the time being?

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-01-27 08:39:39 UTC ---
Author: ebotcazou
Date: Thu Jan 27 08:39:33 2011
New Revision: 169325

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169325
Log:
    PR rtl-optimization/44174
    * gcc.target/i386/asm-6.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/asm-6.c
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug rtl-optimization/44174] [4.4/4.5/4.6 Regression] can't find a register in class 'CLOBBERED_REGS' while reloading 'asm'

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44174

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.4.5                       |4.4.6