[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[dhazeghi@yahoo.com]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7513



------- Additional Comments From dhazeghi@yahoo.com  2003-05-26 04:07 -------
Hello,

gcc 3.1 is a bit old at this point. Would it be possible for you to test against a more recent version 
(ie gcc 3.3) and see if this problem still occurs? Also the testcase you include is quite lengthy. 
Would it be at all possible for you reduce it to something a bit smaller? Thanks,

Dara



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[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[pinskia@physics.uc.edu]

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pinskia@physics.uc.edu changed:

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


------- Additional Comments From pinskia@physics.uc.edu  2003-05-26 04:09 -------
See Dara's Question.



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[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[dhazeghi@yahoo.com]

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dhazeghi@yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|                            |sparc-sun-solaris
   GCC host triplet|                            |sparc-sun-solaris
 GCC target triplet|                            |arm-elf


------- Additional Comments From dhazeghi@yahoo.com  2003-06-02 03:58 -------
Hello,

if I send you the assembly files produced by gcc 3.3 branch and mainline, can you confirm whether 
they still exhibit this problem? Thanks,

Dara



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[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[rearnsha@gcc.gnu.org]

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rearnsha@gcc.gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rearnsha@arm.com
             Status|WAITING                     |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-06-02 14:44:20
               date|                            |


------- Additional Comments From rearnsha@gcc.gnu.org  2003-06-02 14:44 -------
I can confirm that the testcase still shows the bug on 3.3.  While the trunk
does not exhibit the problem, that is because other passes have moved the blocks
of code around and eliminated the need for "far" jumps.



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[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[ted@arraycomm.com]

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------- Additional Comments From ted@arraycomm.com  2003-06-03 18:46 -------
Subject: Re:  [ARM/Thumb] cross-compiler -mthumb -O2 trashes
 link register

I defer to Richard Earnshaw's reply. He is certainly the expert.
May i propose (again) however the simple fix of making -ffixed-lr
be the default until or if the real problem is fixed.
Thanks
Ted Merrill

On 2 Jun 2003, dhazeghi@yahoo.com wrote:

> if I send you the assembly files produced by gcc 3.3 branch and mainline, can you confirm whether
> they still exhibit this problem? Thanks,





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[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[dhazeghi at yahoo dot com]

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dhazeghi at yahoo dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
           Priority|P3                          |P2

[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[cvs-commit at gcc dot gnu dot org]

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------- Additional Comments From cvs-commit at gcc dot gnu dot org  2003-10-31 21:44 -------
Subject: Bug 7513

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rearnsha@gcc.gnu.org	2003-10-31 21:44:40

Modified files:
	gcc            : ChangeLog 

Log message:
	Bah! Missed PR no again!
	PR target/7513
	* arm.h (CONDITIONAL_REGISTER_USAGE): Disable use of LR in Thumb
	code.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.1627&r2=2.1628

[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[rearnsha at gcc dot gnu dot org]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7513


rearnsha at gcc dot gnu dot org changed:

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


------- Additional Comments From rearnsha at gcc dot gnu dot org  2003-10-31 21:49 -------
Fixed with the suggested work-around.  Not pleasant!

[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[dhazeghi at yahoo dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7513

[Bug target/7513] [ARM/Thumb] cross-compiler -mthumb -O2 trashes link register

[rearnsha at gcc dot gnu dot org]

------- Additional Comments From rearnsha at gcc dot gnu dot org  2003-12-19 15:43 -------
*** Bug 13199 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andy dot parker at oxsemi
                   |                            |dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7513