From 6a007d11e31c646a46c0991af0529fc94150a059 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 25 Nov 2011 20:33:27 +0000 Subject: [PATCH] add some notes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145135 91177308-0d34-0410-b5e6-96231b3b80d8 --- docs/ReleaseNotes.html | 3 +++ 1 file changed, 3 insertions(+) diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html index 68bd0f4aa10..8b533e62a43 100644 --- a/docs/ReleaseNotes.html +++ b/docs/ReleaseNotes.html @@ -752,6 +752,9 @@ be used to verify some algorithms. 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. --> -- 2.34.1