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Add some notes about DEBUG flag

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4624 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner
2002-11-08 06:50:02 +00:00
parent b16fb0db91
commit a4e7c4ea68
1 changed files with 10 additions and 3 deletions
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docs/ProgrammersManual.html
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@@ -349,8 +349,15 @@ Then you can run your pass like this:<p>
Using the <tt>DEBUG()</tt> macro instead of a home brewed solution allows you to Using the <tt>DEBUG()</tt> macro instead of a home brewed solution allows you to
now have to create "yet another" command line option for the debug output for now have to create "yet another" command line option for the debug output for
your pass. Note that <tt>DEBUG()</tt> macros are disabled for optimized your pass. Note that <tt>DEBUG()</tt> macros are disabled for optimized builds,
builds, so they do not cause a performance impact at all.<p> so they do not cause a performance impact at all (for the same reason, they
should also not contain side-effects!).<p>
One additional nice thing about the <tt>DEBUG()</tt> macro is that you can
enable or disable it directly in gdb. Just use "<tt>set DebugFlag=0</tt>" or
"<tt>set DebugFlag=1</tt>" from the gdb if the program is running. If the
program hasn't been started yet, you can always just run it with
<tt>-debug</tt>.<p>
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@@ -1769,6 +1776,6 @@ pointer to the parent Function.
<a href="mailto:sabre@nondot.org">Chris Lattner</a></address> <a href="mailto:sabre@nondot.org">Chris Lattner</a></address>
<!-- Created: Tue Aug 6 15:00:33 CDT 2002 --> <!-- Created: Tue Aug 6 15:00:33 CDT 2002 -->
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Last modified: Sun Oct 20 21:37:06 CDT 2002 Last modified: Fri Nov 8 00:48:37 CST 2002
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</font></body></html> </font></body></html>