* ra-build.c
@ 2008-02-28 19:04 aparna
2008-02-29 5:16 ` ra-build.c Ian Lance Taylor
0 siblings, 1 reply; 3+ messages in thread
From: aparna @ 2008-02-28 19:04 UTC (permalink / raw)
To: gcc-help
hi,
pls can any one tell me, why this "for" loop is used
"for (insn = PREV_INSN (insn); insn && !INSN_P (insn);insn = PREV_INSN
(insn));"
IN
function: live_in()
file Name: ra-build.c
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ra-build.c
2008-02-28 19:04 ra-build.c aparna
@ 2008-02-29 5:16 ` Ian Lance Taylor
[not found] ` <2848.10.11.101.94.1204255212.squirrel@www.cse.iitb.ac.in>
0 siblings, 1 reply; 3+ messages in thread
From: Ian Lance Taylor @ 2008-02-29 5:16 UTC (permalink / raw)
To: aparna; +Cc: gcc-help
aparna@cse.iitb.ac.in writes:
> pls can any one tell me, why this "for" loop is used
>
> "for (insn = PREV_INSN (insn); insn && !INSN_P (insn);insn = PREV_INSN
> (insn));"
>
>
> IN
> function: live_in()
> file Name: ra-build.c
It's walking the insn chain backward to find the next real insn.
ra-build.c was removed back in 2005, before the gcc 4.0 release, by
the way.
Ian
^ permalink raw reply [flat|nested] 3+ messages in thread
* interference gragh
[not found] ` <m3mypknu1n.fsf@localhost.localdomain>
@ 2008-03-02 19:39 ` aparna
0 siblings, 0 replies; 3+ messages in thread
From: aparna @ 2008-03-02 19:39 UTC (permalink / raw)
To: Ian Lance Taylor; +Cc: gcc-help
ra-conflict.c file is not there in gcc new version. and global.c is
talking somthing about assignment of hard registers. but, assignment of
hard registers
comes after build interference graph. i am confused.
is both building interference graph and register allocation done in
global.c?
> In gcc 3.4, the interference graph is built in global.c. In current
> mainline gcc, it is built in ra-conflict.c.
>
> Ian
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2008-02-28 19:04 ra-build.c aparna
2008-02-29 5:16 ` ra-build.c Ian Lance Taylor
[not found] ` <2848.10.11.101.94.1204255212.squirrel@www.cse.iitb.ac.in>
[not found] ` <m3mypknu1n.fsf@localhost.localdomain>
2008-03-02 19:39 ` interference gragh aparna
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