[PM] Refactor the new pass manager to use a single template to implement

the generic functionality of the pass managers themselves.

In the new infrastructure, the pass "manager" isn't actually interesting
at all. It just pipelines a single chunk of IR through N passes. We
don't need to know anything about the IR or the passes to do this really
and we can replace the 3 implementations of the exact same functionality
with a single generic PassManager template, complementing the single
generic AnalysisManager template.

I've left typedefs in place to give convenient names to the various
obvious instantiations of the template.

With this, I think I've nuked almost all of the redundant logic in the
managers, and I think the overall design is actually simpler for having
single templates that clearly indicate there is no special logic here.
The logging is made somewhat more annoying by this change, but I don't
think the difference is worth having heavy-weight traits to help log
things.

llvm-svn: 225783

1 files changed, 0 insertions, 32 deletions

diff --git a/llvm/lib/Analysis/CGSCCPassManager.cpp b/llvm/lib/Analysis/CGSCCPassManager.cpp
index 7e86d66..659e37b 100644
--- a/llvm/lib/Analysis/CGSCCPassManager.cpp
+++ b/llvm/lib/Analysis/CGSCCPassManager.cpp
@@ -17,38 +17,6 @@ static cl::opt<bool>
     DebugPM("debug-cgscc-pass-manager", cl::Hidden,
             cl::desc("Print CGSCC pass management debugging information"));
 
-PreservedAnalyses CGSCCPassManager::run(LazyCallGraph::SCC &C,
-                                        CGSCCAnalysisManager *AM) {
-  PreservedAnalyses PA = PreservedAnalyses::all();
-
-  if (DebugPM)
-    dbgs() << "Starting CGSCC pass manager run.\n";
-
-  for (unsigned Idx = 0, Size = Passes.size(); Idx != Size; ++Idx) {
-    if (DebugPM)
-      dbgs() << "Running CGSCC pass: " << Passes[Idx]->name() << "\n";
-
-    PreservedAnalyses PassPA = Passes[Idx]->run(C, AM);
-
-    // If we have an active analysis manager at this level we want to ensure we
-    // update it as each pass runs and potentially invalidates analyses. We
-    // also update the preserved set of analyses based on what analyses we have
-    // already handled the invalidation for here and don't need to invalidate
-    // when finished.
-    if (AM)
-      PassPA = AM->invalidate(C, std::move(PassPA));
-
-    // Finally, we intersect the final preserved analyses to compute the
-    // aggregate preserved set for this pass manager.
-    PA.intersect(std::move(PassPA));
-  }
-
-  if (DebugPM)
-    dbgs() << "Finished CGSCC pass manager run.\n";
-
-  return PA;
-}
-
 char CGSCCAnalysisManagerModuleProxy::PassID;
 
 CGSCCAnalysisManagerModuleProxy::Result