On Jun 7, 2010, at 19:47 , Jeff Squyres wrote:
> I'm getting these warnings from PGI 7.0.7. Do they matter? Is "clobber"
> important?
clobber might be the most important piece of information there, it trigger a
warning for the compiler that the condition code register have been altered.
This code is protected by OMPI_GCC_INLINE_ASSEMBLY, so if we're compiling it it
means that somehow we detected that PGI support the GCC inline assembly. Now,
if they only half-support it, there is not much we can do.
Can you send the assembly instructions generated by the PGI compiler for the
following code:
int32_t oldval;
do {
oldval = *addr;
} while (0 == opal_atomic_cmpset_32(addr, oldval, oldval + delta));
return (oldval + delta);
Thanks,
george.
>
> CXX mpicxx.lo
> "../../../opal/include/opal/sys/amd64/atomic.h", line 91: warning: "cc"
> clobber ignored
> : "memory", "cc");
> ^
>
> "../../../opal/include/opal/sys/amd64/atomic.h", line 83: warning: parameter
> "oldval" was set but never used
> int32_t oldval, int32_t newval)
> ^
>
> "../../../opal/include/opal/sys/amd64/atomic.h", line 112: warning: "cc"
> clobber ignored
> : "memory", "cc"
> ^
>
> "../../../opal/include/opal/sys/amd64/atomic.h", line 104: warning: parameter
> "oldval" was set but never used
> int64_t oldval, int64_t newval)
> ^
>
> --
> Jeff Squyres
> jsquy...@cisco.com
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
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