Release notes for segmented stacks.

Patch by Sanjoy Das.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145416 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index c6657b94d6603fe2ac34aae8a7a94bcdf563914d..faf9a4bd2b3dbe198b273f995bebe9ccdb1ec6b3 100644 (file)
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -936,7 +936,10 @@ be used to verify some algorithms.
    make it run faster:</p>
 
 <ul>
-<li>XXX: Segmented stacks.</li>
+<li>LLVM can now produce code that works with libgcc
+    to <a href="SegmentedStacks.html">dynamically allocate stack
+    segments</a>, as opposed to allocating a worst-case chunk of
+    virtual memory for each thread.</li>
 <li>LLVM generates substantially better code for indirect gotos due to a new
     tail duplication pass, which can be a substantial performance win for
     interpreter loops that use them.</li>

diff --git a/docs/SegmentedStacks.html b/docs/SegmentedStacks.html
index a91b109308a2242c6170307636f31afca0a69de0..16f55074732c38ec6058e52f0a261bfda8a2852f 100644 (file)
--- a/docs/SegmentedStacks.html
+++ b/docs/SegmentedStacks.html
@@ -20,18 +20,12 @@
                   <li><a href="#alloca">Variable Sized Allocas</a></li>
                 </ol>
           </li>
-          <li><a href="#results">Results</a>
-            <ol>
-              <li><a href="#go">Go on LLVM</a></li>
-              <li><a href="#abi">Runtime ABI</a></li>
-            </ol>
-          </li>
         </ol>
 
         <h2><a name="intro">Introduction</a></h2>
         <div>
           <p>
-            Segmented stack allows stack space to be allocated incrementally than as a monolithic chunk (of some worst case size) at thread initialization. This is done by allocating stack blocks (henceforth called <em>stacklets</em>) and linking them into a doubly linked list. The function prologue is responsible for checking if the current stacklet has enough space for the function to execute; and if not, call into the libgcc runtime to allocate more stack space. Support for segmented stacks on x86 / Linux is currently being worked on.
+            Segmented stack allows stack space to be allocated incrementally than as a monolithic chunk (of some worst case size) at thread initialization. This is done by allocating stack blocks (henceforth called <em>stacklets</em>) and linking them into a doubly linked list. The function prologue is responsible for checking if the current stacklet has enough space for the function to execute; and if not, call into the libgcc runtime to allocate more stack space. When using <tt>llc</tt>, segmented stacks can be enabled by adding <tt>-segmented-stacks</tt> to the command line.
           </p>
           <p>
             The runtime functionality is <a href="http://gcc.gnu.org/wiki/SplitStacks">already there in libgcc</a>.