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* optimization/8112: gcc 3.2 sparc-sun-solaris2.8: -O2 != -O1
@ 2002-10-01 14:16 rrh
0 siblings, 0 replies; 2+ messages in thread
From: rrh @ 2002-10-01 14:16 UTC (permalink / raw)
To: gcc-gnats; +Cc: nathan
>Number: 8112
>Category: optimization
>Synopsis: gcc 3.2 sparc-sun-solaris2.8: -O2 != -O1
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Tue Oct 01 14:16:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: rrh@cray.com
>Release: gcc 3.2
>Organization:
>Environment:
sparc-sun-solaris2.8
>Description:
gcc -v shows:
Reading specs from /sw/gen/sparc-sun-solaris2.8/gcc/3.2/lib/gcc-lib/sparc-sun-solaris2.8/3.2/specs
Configured with: /export/data01/build/cpkg/programs/gcc/3.2/work.korsakoff.wc.cray.com/gcc-3.2/configure --with-gnu-as --with-as=/sw/gen/sparc-sun-solaris2.8/binutils/2.12.1/bin/as --with-gnu-ld --with-ld=/sw/gen/sparc-sun-solaris2.8/binutils/2.12.1/bin/ld --enable-languages=c++,f77,objc --with-local-prefix=/sw/gen/sparc-sun-solaris2.8/gcc/3.2 --prefix=/sw/gen/sparc-sun-solaris2.8/gcc/3.2
Thread model: posix
gcc version 3.2
Compile the attached program using "g++ -O1"; execute;
see the correct answer
result=1 expect=1
Compile the attached program using "g++ -O2"; execute;
see the incorrect answer
result=0 expect=1
g++ -O3 also fails the same way as g++ -O2
The code uses a template to encapsulate operations on
unsigned long long. Changing the liveness of some of the
automatics (for example to print the intermediate results)
will make the code do the right thing.
This problem is not repeatable on gcc3.2 on i686-pc-linux.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: optimization/8112: gcc 3.2 sparc-sun-solaris2.8: -O2 != -O1
@ 2003-03-14 14:12 ebotcazou
0 siblings, 0 replies; 2+ messages in thread
From: ebotcazou @ 2003-03-14 14:12 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nathan, nobody, rrh
Synopsis: gcc 3.2 sparc-sun-solaris2.8: -O2 != -O1
State-Changed-From-To: open->closed
State-Changed-By: ebotcazou
State-Changed-When: Fri Mar 14 14:12:40 2003
State-Changed-Why:
Can't reproduce with gcc 3.2.1 and gcc 3.2.2 on sparc-sun-solaris2.8
and sparc-sun-solaris2.9 so very likely fixed in the meantime.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8112
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2003-03-14 14:12 UTC | newest]
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2003-03-14 14:12 ebotcazou
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