From 9606231dd203163c8ca839b3f58c6e40a3805fa8 Mon Sep 17 00:00:00 2001
From: David Terei <davidterei@gmail.com>
Date: Wed, 28 Mar 2012 00:50:21 -0700
Subject: Don't document '-fregs-liveness' or '-fllvm-tbaa', both hidden flags

No reason user should turn them off, just want for ghc developer
debugging uses.
---
 docs/users_guide/using.xml | 45 ---------------------------------------------
 1 file changed, 45 deletions(-)

(limited to 'docs')

diff --git a/docs/users_guide/using.xml b/docs/users_guide/using.xml
index b210a3b313..9df4ee01c1 100644
--- a/docs/users_guide/using.xml
+++ b/docs/users_guide/using.xml
@@ -2147,51 +2147,6 @@ f "2"    = 2
           </listitem>
         </varlistentry>
 
-        <varlistentry>
-          <term>
-            <option>-fregs-liveness</option>
-            <indexterm><primary><option>-fregs-liveness</option></primary></indexterm>
-            <indexterm><primary>registers</primary></indexterm>
-            <indexterm><primary>stg registers</primary></indexterm>
-            <indexterm><primary>llvm optimisations</primary></indexterm>
-          </term>
-          <listitem>
-            <para><emphasis>This flag only works with the LLVM
-            (<option>-fllvm</option>) backend.</emphasis></para>
-
-            <para>GHC stores some state information that the runtime /
-            execution model needs frequent access to in the underlying
-            hardware registers. GHC historically has simply reserved these
-            registers for exclusive use for this purpose, stopping them being
-            using by intermediate code in a function. This optimisation
-            instead tracks when GHC actually needs to store this state and in
-            cases where it doesn't need it, frees up those hardware registers
-            for use.</para>
-
-            <para>Since GHC 7.6.1</para>
-          </listitem>
-        </varlistentry>
-
-        <varlistentry>
-          <term>
-            <option>-fllvm-tbaa</option>
-            <indexterm><primary><option>-fllvm-tbaa</option></primary></indexterm>
-            <indexterm><primary>alias analysis</primary></indexterm>
-            <indexterm><primary>llvm optimisations</primary></indexterm>
-          </term>
-          <listitem>
-            <para><emphasis>This flag only works with the LLVM
-            (<option>-fllvm</option>) backend.</emphasis></para>
-
-            <para>This optimisation enhances the alias analysis pass done by
-            the LLVM code generator which should result in more efficient
-            code as many other optimisations rely on accurate alias
-            information.</para>
-
-            <para>Since GHC 7.6.1</para>
-          </listitem>
-        </varlistentry>
-
         <varlistentry>
           <term>
             <option>-fexcess-precision</option>
-- 
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