Re: optimization/5854: initialize_uninitialized_subregs() breaks HC11/HC12 port

Re: optimization/5854: initialize_uninitialized_subregs() breaks HC11/HC12 port

[jakub]

Synopsis: initialize_uninitialized_subregs() breaks HC11/HC12 port

State-Changed-From-To: open->feedback
State-Changed-By: jakub
State-Changed-When: Wed Mar 20 02:02:52 2002
State-Changed-Why:
    Can you please attach preprocessed source on which it ICEs
    plus arguments used?

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5854

Re: optimization/5854: initialize_uninitialized_subregs() breaks HC11/HC12 port

[jakub]

Synopsis: initialize_uninitialized_subregs() breaks HC11/HC12 port

State-Changed-From-To: analyzed->closed
State-Changed-By: jakub
State-Changed-When: Thu Apr  4 02:17:06 2002
State-Changed-Why:
    Fixed.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5854

Re: optimization/5854: initialize_uninitialized_subregs() breaks HC11/HC12 port

[jakub]

Synopsis: initialize_uninitialized_subregs() breaks HC11/HC12 port

Responsible-Changed-From-To: unassigned->jakub
Responsible-Changed-By: jakub
Responsible-Changed-When: Thu Mar 21 15:42:15 2002
Responsible-Changed-Why:
    Working on a fix.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5854

Re: optimization/5854: initialize_uninitialized_subregs() breaks HC11/HC12 port

[ciceron]

Synopsis: initialize_uninitialized_subregs() breaks HC11/HC12 port

State-Changed-From-To: feedback->analyzed
State-Changed-By: ciceron
State-Changed-When: Wed Mar 20 13:56:58 2002
State-Changed-Why:
    I added explanation on how to reproduce and detailed
    explanation of what is the problem in gcc.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5854

optimization/5854: initialize_uninitialized_subregs() breaks HC11/HC12 port

[Stephane.Carrez]

>Number:         5854
>Category:       optimization
>Synopsis:       initialize_uninitialized_subregs() breaks HC11/HC12 port
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 06 12:36:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Stephane Carrez
>Release:        3_1-20020305
>Organization:
>Environment:

>Description:
The patch:

http://gcc.gnu.org/ml/gcc-patches/2001-11/msg01067.html

From: Andrew Macleod <amacleod at cygnus dot com>

        * rtl.h (initialize_uninitialized_subregs): New prototype.
        * toplev.c (rest_of_compilation): Call initialize_uninitialized_subregs
        when optimization is on.
        * flow.c (find_regno_partial): Find subregs within an expression.
        (initialize_uninitialized_subregs): Initialize live on entry registers
        which are used in subreg expressions.

creates a regression on m6811 target compared to 3.0.3/3.0.4
It is no longer possible to build the libgcc2 library.

Removing or disabling the call to
initialize_uninitialized_subregs() solves the problem.


>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: