Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be
disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index e31bad7..75a6fd1 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -499,6 +499,13 @@
<div>
+<p>Stack Coloring - We have implemented a new optimization pass
+ to merge stack objects which are used in disjoin areas of the code.
+ This optimization reduces the required stack space significantly, in cases
+ where it is clear to the optimizer that the stack slot is not shared.
+ We use the lifetime markers to tell the codegen that a certain alloca
+ is used within a region.</p>
+
<p>We have put a significant amount of work into the code generator
infrastructure, which allows us to implement more aggressive algorithms and
make it run faster:</p>