[PM] port Rewrite Statepoints For GC to the new pass manager.

Summary:
The port is nearly straightforward.
The only complication is related to the analyses handling,
since one of the analyses used in this module pass is domtree,
which is a function analysis. That requires asking for the results
of each function and disallows a single interface for run-on-module
pass action.

Decided to copy-paste the main body of this pass.
Most of its code is requesting analyses anyway, so not that much
of a copy-paste.

The rest of the code movement is to transform all the implementation
helper functions like stripNonValidData into non-member statics.

Extended all the related LLVM tests with new-pass-manager use.
No failures.

Reviewers: sanjoy, anna, reames

Reviewed By: anna

Subscribers: skatkov, llvm-commits

Differential Revision: https://reviews.llvm.org/D41162

llvm-svn: 320796
diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/libcall.ll b/llvm/test/Transforms/RewriteStatepointsForGC/libcall.ll
index 4dbc9fe..cb54858 100644
--- a/llvm/test/Transforms/RewriteStatepointsForGC/libcall.ll
+++ b/llvm/test/Transforms/RewriteStatepointsForGC/libcall.ll
@@ -2,6 +2,7 @@
 ; This test verifies that calls to libcalls functions do not get converted to
 ; statepoint calls.
 ; RUN: opt -S -rewrite-statepoints-for-gc < %s | FileCheck %s
+; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
 
 declare double @ldexp(double %x, i32 %n) nounwind readnone