* Variant code generation
[not found] <1297727993.9081.ezmlm@gcc.gnu.org>
@ 2011-02-16 7:07 ` sankar chebolu
2011-02-16 8:53 ` Ian Lance Taylor
0 siblings, 1 reply; 2+ messages in thread
From: sankar chebolu @ 2011-02-16 7:07 UTC (permalink / raw)
To: gcc-help
Hi all,
Does GCC has any command line switches which generate variant code?
To be more precise, Does GCC has some switches which, if applied to certain input program, it is not necessary that they will generate exactly the same code everytime.
Regards,
Sankar
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* Re: Variant code generation
2011-02-16 7:07 ` Variant code generation sankar chebolu
@ 2011-02-16 8:53 ` Ian Lance Taylor
0 siblings, 0 replies; 2+ messages in thread
From: Ian Lance Taylor @ 2011-02-16 8:53 UTC (permalink / raw)
To: sankar chebolu; +Cc: gcc-help
sankar chebolu <chnabsankar@yahoo.com> writes:
> Does GCC has any command line switches which generate variant code?
> To be more precise, Does GCC has some switches which, if applied to certain input program, it is not necessary that they will generate exactly the same code everytime.
GCC is generally intended to be deterministic, in the sense that if you
run it twice with the same input and the same options, you should get
precisely the same result.
There are a few exceptions: there are a few places where GCC uses random
numbers. For those places you can use the -frandom-seed option where
deterministic output is important. See the description of that option
for the cases where random numbers are used.
Ian
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[not found] <1297727993.9081.ezmlm@gcc.gnu.org>
2011-02-16 7:07 ` Variant code generation sankar chebolu
2011-02-16 8:53 ` Ian Lance Taylor
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