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| author | Chris Lattner <sabre@nondot.org> | 2011-11-25 20:33:27 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-11-25 20:33:27 +0000 |
| commit | 6a007d11e31c646a46c0991af0529fc94150a059 (patch) | |
| tree | cdc19c3ad9306ba620633104f86393940c0c63d8 /docs | |
| parent | adb417afa6168771077e84dd1174e716316a9473 (diff) | |
add some notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145135 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/ReleaseNotes.html | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html index 68bd0f4aa1..8b533e62a4 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. --> |