[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[eweddington at cso dot atmel dot com]

------- Comment #2 from eweddington at cso dot atmel dot com  2007-07-25 17:57 -------
The AVR test results for a 4.2.1 prerelease still shows failure on -O0 only:
http://gcc.gnu.org/ml/gcc-testresults/2007-07/msg00335.html

However the results for a 4.3 snapshot shows failure on all -O settings:
http://gcc.gnu.org/ml/gcc-testresults/2007-07/msg00603.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[hutchinsonandy at aim dot com]

------- Comment #3 from hutchinsonandy at aim dot com  2008-03-29 12:55 -------
Created an attachment (id=15396)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15396&action=view)
Patch to correct return_address

The attached patch fixes this problem and PR21078
The AVR target support for builtin_return_address only returned value of
frame_pointer+1 - so it would only be correct if stack and frame were empty.

The attached patch calculates the stack usage in the function prolog. This is
placed in symbol stack_usage using UNSPEC instruction pattern. Builtin Return
address uses RETURN_ADDR_RTX(count, tem) to add this to frame pointer to get to
correct address. This only supports level 0 (same function). Other levels (ie
upper functions) return 0  - which is correct response if not supported.
The address is that read from the stack - ie word address.

Testsuite torture/execute/20010122-1.c and PR17377.c both pass with this patch
applied.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[eric dot weddington at atmel dot com]

-- 

eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-04-04 21:43:08
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[hutchinsonandy at gcc dot gnu dot org]

------- Comment #4 from hutchinsonandy at gcc dot gnu dot org  2009-10-31 15:27 -------
*** Bug 21078 has been marked as a duplicate of this bug. ***


-- 
Bug 21080 depends on bug 21078, which changed state.

Bug 21078 Summary: Testsuite reports excecution failure for gcc.c-torture/execute/20010122.c for some optimization levels
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21078

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[hutchinsonandy at gcc dot gnu dot org]

------- Comment #5 from hutchinsonandy at gcc dot gnu dot org  2009-10-31 17:02 -------
Anatoly,

can we implement this patch to correct __builtin_return_address and thus remove
these old bug reports and associated testsuite failures? It also provides a
means to document stack usage which would seem useful.


-- 

hutchinsonandy at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aesok at pautinka dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[hutchinsonandy at gcc dot gnu dot org]

------- Comment #6 from hutchinsonandy at gcc dot gnu dot org  2009-11-26 17:20 -------
Fixed on 4.5

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21078


-- 

hutchinsonandy at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[eric dot weddington at atmel dot com]

------- Comment #7 from eric dot weddington at atmel dot com  2010-01-29 17:08 -------
Setting Target Milestone.


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eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080

[Bug target/21080] Excecution test failure for avr for pr17377 test case.

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-17 22:47 -------
This looks like the same cause as PR 21078 since both use __builtin_return_address.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |21078
          Component|c                           |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21080