tree 20f6625dd81b0c6f8870d7213336aa7a4316431b
parent dc14d72264ef5a37fcc5266b2fba4d684653e9ec
author Daniel Sanders <daniel_l_sanders@apple.com> 1550869147 +0000
committer Daniel Sanders <daniel_l_sanders@apple.com> 1550869147 +0000

Restore ability for C++ API users to Enable IPRA.

Summary:
Prior to r310876 one of our out-of-tree targets was enabling IPRA by modifying
the TargetOptions::EnableIPRA. This no longer works on current trunk since the
useIPRA() hook overrides any values that are set in advance. This patch adjusts
the behaviour of the hook so that API users and useIPRA() can both enable it
but useIPRA() cannot disable it if the API user already enabled it.

Reviewers: arsenm

Reviewed By: arsenm

Subscribers: wdng, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D38043

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354692 91177308-0d34-0410-b5e6-96231b3b80d8