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* Re: optimization/6647: -O2 (or above) invalid optimization
@ 2002-05-14 8:11 jakub
0 siblings, 0 replies; 3+ messages in thread
From: jakub @ 2002-05-14 8:11 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, pmassimi, skal
Synopsis: -O2 (or above) invalid optimization
State-Changed-From-To: open->analyzed
State-Changed-By: jakub
State-Changed-When: Tue May 14 08:11:43 2002
State-Changed-Why:
The optimization is valid, the source is not.
The code does illegal type punning, see info gcc on
-fstrict-aliasing for details.
Either rewrite the code using unions, or use -fno-strict-aliasing.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6647
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: optimization/6647: -O2 (or above) invalid optimization
@ 2002-05-16 18:56 rth
0 siblings, 0 replies; 3+ messages in thread
From: rth @ 2002-05-16 18:56 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, pmassimi, skal
Synopsis: -O2 (or above) invalid optimization
State-Changed-From-To: analyzed->closed
State-Changed-By: rth
State-Changed-When: Thu May 16 18:56:12 2002
State-Changed-Why:
Jakub, please just close these after diagnosing not-a-bug.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6647
^ permalink raw reply [flat|nested] 3+ messages in thread
* optimization/6647: -O2 (or above) invalid optimization
@ 2002-05-13 8:26 skal
0 siblings, 0 replies; 3+ messages in thread
From: skal @ 2002-05-13 8:26 UTC (permalink / raw)
To: gcc-gnats; +Cc: pmassimi
>Number: 6647
>Category: optimization
>Synopsis: -O2 (or above) invalid optimization
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon May 13 08:26:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Pascal Massimino
>Release: 2.96 -> 3.0.4
>Organization:
>Environment:
PIII mobile, linux, redhat 7.1
>Description:
Initialization of a 'float/double' variable occurs
after its address taken and derefenced.
Only occurs with -O2 or above.
>How-To-Repeat:
see attached file bug.cpp
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2002-05-17 1:56 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2002-05-14 8:11 optimization/6647: -O2 (or above) invalid optimization jakub
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2002-05-16 18:56 rth
2002-05-13 8:26 skal
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