Remove -fvia-C references from the users guide

[ghc-hetmet.git] / docs / users_guide / sooner.xml

diff --git a/docs/users_guide/sooner.xml b/docs/users_guide/sooner.xml
index bb2eb87..ea3e306 100644 (file)
--- a/docs/users_guide/sooner.xml
+++ b/docs/users_guide/sooner.xml
@@ -32,7 +32,7 @@ should go here!</para>
           garbage collection for GHC, which means less compilation
           time.  If you use the <option>-Rghc-timing</option> option,
           you'll get a garbage-collector report.  (Again, you can use
-          the cheap-and-nasty <option>+RTS -Sstderr -RTS</option>
+          the cheap-and-nasty <option>+RTS -S -RTS</option>
           option to send the GC stats straight to standard
           error.)</para>
 
@@ -152,14 +152,13 @@ should go here!</para>
       </varlistentry>
 
       <varlistentry>
-       <term>Compile via C and crank up GCC:</term>
+       <term>Compile via LLVM:</term>
        <listitem>
-         <para>The native code-generator is designed to be quick, not
-          mind-bogglingly clever.  Better to let GCC have a go, as it
-          tries much harder on register allocation, etc.</para>
-
-         <para>So, when we want very fast code, we use: <option>-O
-         -fvia-C</option>.</para>
+               <para>The LLVM code generator can sometimes do a far better job
+                           at producing fast code then either the native code generator
+                                       or the C code generator. This is not universal and depends
+                                       on the code. Numeric heavy code seems to show the best
+                                       improvement when compiled via LLVM.</para>
        </listitem>
       </varlistentry>
 
@@ -511,13 +510,13 @@ Use <literal>strip</literal> on your executables.
 
 <para>
 &ldquo;I think I have a space leak&hellip;&rdquo; Re-run your program
-with <option>+RTS -Sstderr</option>, and remove all doubt!  (You'll
+with <option>+RTS -S</option>, and remove all doubt!  (You'll
 see the heap usage get bigger and bigger&hellip;)
 &lsqb;Hmmm&hellip;this might be even easier with the
 <option>-G1</option> RTS option; so&hellip; <command>./a.out +RTS
--Sstderr -G1</command>...]
+-S -G1</command>...]
 <indexterm><primary>-G RTS option</primary></indexterm>
-<indexterm><primary>-Sstderr RTS option</primary></indexterm>
+<indexterm><primary>-S RTS option</primary></indexterm>
 </para>
 
 <para>
@@ -539,7 +538,6 @@ be required).
 
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