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how to get the .dfa output file in gcc

From: ddmetro <puzzlesdj at gmail dot com>
To: gcc at gcc dot gnu dot org
Date: Wed, 30 Sep 2009 10:26:06 -0700 (PDT)
Subject: how to get the .dfa output file in gcc

Hi All,

We are trying to get the .dfa output file, showing details about the
automaton constructed for - instruction scheduling, using pipeline hazard
detector. However we are unable to do so.

We tried
(a.)uncommenting - (automata_option "v") - in ia64.md file
(b.)adding v_flag = 1 in gen_automata_option() function of genautomata.c
file
and running: make insn-automata.c

None of these gave a .dfa output file.
 
Target language for which optimization is being done: C
Target machine architecture: i686
GCC version: 4.4.1

Kindly help us with our issue.

Thanking All
-Dhiraj

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