tree 358575fc4e073a8d07c31b5d4d323812fcca40f0
parent 9fe9eec3d85d343003b381c2ae41ea70ffe1c6aa
author Amara Emerson <aemerson@apple.com> 1555304026 +0000
committer Amara Emerson <aemerson@apple.com> 1555304026 +0000

[GlobalISel] Introduce a CSEConfigBase class to allow targets to define their own CSE configs.

Because CodeGen can't depend on GlobalISel, we need a way to encapsulate the CSE
configs that can be passed between TargetPassConfig and the targets' custom
pass configs. This CSEConfigBase allows targets to create custom CSE configs
which is then used by the GISel passes for the CSEMIRBuilder.

This support will be used in a follow up commit to allow constant-only CSE for
-O0 compiles in D60580.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358368 91177308-0d34-0410-b5e6-96231b3b80d8