This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
optimization/2076: scheduler ignores data dependency
- To: gcc-gnats at gcc dot gnu dot org
- Subject: optimization/2076: scheduler ignores data dependency
- From: dje at watson dot ibm dot com
- Date: 23 Feb 2001 22:36:19 -0000
- Reply-To: dje at watson dot ibm dot com
>Number: 2076
>Category: optimization
>Synopsis: scheduler ignores data dependency
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Feb 23 14:46:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: dje@watson.ibm.com
>Release: gcc-3.0 20010222 (prerelease)
>Organization:
>Environment:
rs6000-ibm-aix4.3.3.0
>Description:
c-torture/execute/980205.c demonstrates a bug where the
first scheduler pass moves a load of a parameter from the
stack argument area before the parameter has been spilled
to the argument area. Compiler pass 980205.c.16.regmove
shows the arguments spilled to the argument area before
FP pseudo is loaded. After the scheduling pass, the load
from the pseudo has been moved to the beginning of the
basic block before the argument area on the stack is valid.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: