Have separate flags for "optimizer debug" and "print DOT graph".

Instead of having -dddd mean "-ddd and print the CFG as a DOT graph",
have a separate -g flag to request the CFG.

Also, put the routines to set the "optimizer debug" and "print DOT
graph" flags into optimize.c, and make the flags in question static.

(And "CFG graph" is redundant, like "ATM machine", "PIN number", and "NT
technology"....)

1 files changed, 5 insertions, 4 deletions

diff --git a/testprogs/visopts.py b/testprogs/visopts.py
index d0e46d64..03aa804e 100755
--- a/testprogs/visopts.py
+++ b/testprogs/visopts.py
@@ -10,12 +10,13 @@ Usage guide:
        ./configure --enable-optimizer-dbg
        make
        make testprogs
-2. Run filtertest to compile BPF expression, save to output a.txt
-       testprogs/filtertest EN10MB host 192.168.1.1 > a.txt
+2. Run filtertest to compile BPF expression and produce the CFG as a
+   DOT graph, save to output a.txt
+       testprogs/filtertest -g EN10MB host 192.168.1.1 > a.txt
 3. Send a.txt to this program's standard input
        cat a.txt | testprogs/visopts.py
 4. Step 2&3 can be merged:
-       testprogs/filtertest EN10MB host 192.168.1.1 | testprogs/visopts.py
+       testprogs/filtertest -g EN10MB host 192.168.1.1 | testprogs/visopts.py
 5. The standard output is something like this:
        generated files under directory: /tmp/visopts-W9ekBw
          the directory will be removed when this programs finished.
@@ -23,7 +24,7 @@ Usage guide:
 6. Using open link at the 3rd line `http://localhost:39062/expr1.html'
 
 Note:
-1. CFG graph is translated to SVG document, expr1.html embeded them as external
+1. The CFG is translated to SVG an document, expr1.html embeded them as external
    document. If you open expr1.html as local file using file:// protocol, some
    browsers will deny such requests so the web pages will not shown properly.
    For chrome, you can run it using following command to avoid this: