[llvm-commits] [llvm] r145135 - /llvm/trunk/docs/ReleaseNotes.html

[Chris Lattner]

Author: lattner
Date: Fri Nov 25 14:33:27 2011
New Revision: 145135

URL: http://llvm.org/viewvc/llvm-project?rev=145135&view=rev
Log:
add some notes

Modified:
    llvm/trunk/docs/ReleaseNotes.html

Modified: llvm/trunk/docs/ReleaseNotes.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/ReleaseNotes.html?rev=145135&r1=145134&r2=145135&view=diff
==============================================================================
--- llvm/trunk/docs/ReleaseNotes.html (original)
+++ llvm/trunk/docs/ReleaseNotes.html Fri Nov 25 14:33:27 2011
@@ -752,6 +752,9 @@
  Better code generation for Cortex-A9
  Many APIs take ArrayRef's now.
  Pass manager extension API.
+
+
+Information about branch probability and basic block frequency is now available within LLVM based on a combination of static branch prediction heuristics and __builtin_expect calls.  That information is currently used for register spill placement and if-conversion, with additional optimizations planned for future releases.  The same frameworks are intended for eventual use with profile-guided optimization, but that is not yet implemented.
  
  -->