This is the mail archive of the libc-hacker@sources.redhat.com mailing list for the glibc project.

Note that libc-hacker is a closed list. You may look at the archives of this list, but subscription and posting are not open.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: INTERNAL_SYSCALL and function calls in arguments

Ulrich Drepper <drepper@redhat.com> writes:

> Andreas Schwab wrote:
>
>> Here is a patch to fix the INTERNAL_SYSCALL macro for x86_64 and ia64.
>> The definition on arm is probably also affected, but I can't test it.
>
> How does the generated code for all cases but the problematic one look
> like?  If more code is generated the change is no good.

Since the change only introduces temporary variables which the compiler
would create internally anyway, the compiler is perfectly capable to
optimize them away, and in all cases except sched_setaffinity the
generated code is virtually identical.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]