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diff --git a/docs/WritingAnLLVMPass.html b/docs/WritingAnLLVMPass.html index 7d81c81..14811fd 100644 --- a/docs/WritingAnLLVMPass.html +++ b/docs/WritingAnLLVMPass.html @@ -19,6 +19,7 @@ </ul> <li><a href="#passtype">Pass classes and requirements</a> <ul> + <li><a href="#ImmutablePass">The <tt>ImmutablePass</tt> class</a> <li><a href="#Pass">The <tt>Pass</tt> class</a> <ul> <li><a href="#run">The <tt>run</tt> method</a> @@ -365,6 +366,27 @@ optimize how passes are run, so that the resultant compiler isn't unneccesarily slow.<p> +<!-- ======================================================================= --> +</ul><table width="100%" bgcolor="#441188" border=0 cellpadding=4 cellspacing=0> +<tr><td> </td><td width="100%"> +<font color="#EEEEFF" face="Georgia,Palatino"><b> +<a name="ImmutablePass">The <tt>ImmutablePass</tt> class +</b></font></td></tr></table><ul> + +The most plain and boring type of pass is the "<tt><a +href="http://llvm.cs.uiuc.edu/doxygen/structImmutablePass.html">ImmutablePass</a></tt>" +class. This pass type is used for passes that do not have to be run, do not +change state, and never need to be updated. This is not a normal type of +transformation or analysis, but can provide information about the current +compiler configuration.<p> + +Although this pass class is very infrequently used, it is important for +providing information about the current target machine being compiled for, and +other static information that can affect the various transformations.<p> + +<tt>ImmutablePass</tt>'s never invalidate other transformations, are never +invalidated, and are never "run".<p> + <!-- ======================================================================= --> </ul><table width="100%" bgcolor="#441188" border=0 cellpadding=4 cellspacing=0> @@ -1201,6 +1223,6 @@ href="#Pass"><tt>Pass</tt></a>, only the other way around.<p> <address><a href="mailto:sabre@nondot.org">Chris Lattner</a></address> <!-- Created: Tue Aug 6 15:00:33 CDT 2002 --> <!-- hhmts start --> -Last modified: Mon Sep 16 17:37:27 CDT 2002 +Last modified: Wed Sep 25 17:20:10 CDT 2002 <!-- hhmts end --> </font></body></html> |