[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ramana at gcc dot gnu.org
      Known to fail|                            |

--- Comment #16 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2010-12-03 11:04:06 UTC ---
Isn't this now fixed ? 

Ramana

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[martinwguy at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

--- Comment #17 from Martin Guy <martinwguy at gmail dot com> 2010-12-03 14:46:28 UTC ---
Sort of. The cause of the bug was never found, and the workaround is to disable
an instruction.  It might be worth trying enabling movsfcc in current GCC and
re-running the tests, since the conditional execution stuff in the middle end
was rewritten between 4.3 and 4.4 if I remember correctly, so the actual bug in
the middle end may have gone away with that rewrite.

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |4.3.4

--- Comment #18 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
fixed.

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[rearnsha at gcc dot gnu dot org]

------- Comment #15 from rearnsha at gcc dot gnu dot org  2009-05-16 22:25 -------
Subject: Bug 39501

Author: rearnsha
Date: Sat May 16 22:24:59 2009
New Revision: 147623

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=147623
Log:
        PR target/39501
        * arm.md (movsfcc): Disable if not TARGET_HARD_FLOAT.
        * testsuite/gcc.c-torture/execute/pr39501.c: New file.
        * testsuite/gcc.c-torture/execute/pr39501.x: New file.

Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.c-torture/execute/pr39501.c
    branches/gcc-4_3-branch/gcc/testsuite/gcc.c-torture/execute/pr39501.x
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/config/arm/arm.md


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[rearnsha at gcc dot gnu dot org]

------- Comment #14 from rearnsha at gcc dot gnu dot org  2009-04-04 12:25 -------
Subject: Bug 39501

Author: rearnsha
Date: Sat Apr  4 12:25:06 2009
New Revision: 145537

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145537
Log:
        PR target/39501
        * arm.md (movsfcc): Disable if not TARGET_HARD_FLOAT.
        * testsuite/gcc.c-torture/execute/pr39501.c: New file.
        * testsuite/gcc.c-torture/execute/pr39501.x: New file.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/execute/pr39501.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/execute/pr39501.x
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/config/arm/arm.md


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[steven at gcc dot gnu dot org]

------- Comment #13 from steven at gcc dot gnu dot org  2009-04-04 12:00 -------
Re. comment #10: I don't know about the "buggier" and "slower" parts.

But for "bigger" I know we have benchmarks that say otherwise. e.g. CSiBE for
arm-elf (http://www.inf.u-szeged.hu/csibe/s-arm.php) and CSiBE for arm-linux
(http://www.inf.u-szeged.hu/csibe/s-arm-linux.php, unfortunately stopped
running in 2006 due to -- you've guessed it -- lack of funding).

Obviously there's no denying that GCC still is too far behind most commercial
compilers for ARM...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[steven at gcc dot gnu dot org]

------- Comment #12 from steven at gcc dot gnu dot org  2009-04-04 11:53 -------
Re. comment #10: And who are you funding, Martin Guy, to improve GCC for ARM?
Or are you just another user who expects magic for free?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[martinwguy at yahoo dot it]

------- Comment #11 from martinwguy at yahoo dot it  2009-04-04 11:50 -------
Sorry about that. I've now seen
http://gcc.gnu.org/ml/gcc-patches/2009-04/msg00300.html

    M


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[martinwguy at yahoo dot it]

------- Comment #10 from martinwguy at yahoo dot it  2009-04-04 11:23 -------
Is that *it*? Disable movsfcc completely without finding the cause of the
specific failure?
No wonder the generated ARM code is bigger, slower and buggier with every
release!


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501

[Bug target/39501] -O -ffinite-math-only gets min(x,y) optimization wrong for soft-float on arm-*-gnueabi

[rearnsha at gcc dot gnu dot org]

------- Comment #9 from rearnsha at gcc dot gnu dot org  2009-04-04 10:37 -------
Subject: Bug 39501

Author: rearnsha
Date: Sat Apr  4 10:37:10 2009
New Revision: 145534

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145534
Log:
        PR target/39501
        * arm.md (movsfcc): Disable if not TARGET_HARD_FLOAT.
        * testsuite/gcc.c-torture/execute/pr39501.c: New file.
        * testsuite/gcc.c-torture/execute/pr39501.x: New file.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr39501.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr39501.x
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.md


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501