Sanjay Patel 1cded9afe4 add unpredictable metadata type for control flow ...

This patch defines 'unpredictable' metadata. This metadata can be used to signal to the optimizer
or backend that a branch or switch is unpredictable, and therefore, it's probably better to not
split a compound predicate into multiple branches such as in CodeGenPrepare::splitBranchCondition().

This was discussed in:
https://llvm.org/bugs/show_bug.cgi?id=23827

Dependent patches to alter codegen and expose this in clang to follow.

Differential Revision; http://reviews.llvm.org/D12341


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246688 91177308-0d34-0410-b5e6-96231b3b80d8

2015-09-02 19:06:43 +00:00

..

llvm

add unpredictable metadata type for control flow

2015-09-02 19:06:43 +00:00

llvm-c

LTO: Simplify merged module ownership.

2015-08-24 22:22:53 +00:00