[PM] Add pass run listeners to the pass manager.

This commit provides the necessary C/C++ APIs and infastructure to enable fine-
grain progress report and safe suspension points after each pass in the pass
manager.

Clients can provide a callback function to the pass manager to call after each
pass. This can be used in a variety of ways (progress report, dumping of IR
between passes, safe suspension of threads, etc).

The run listener list is maintained in the LLVMContext, which allows a multi-
threaded client to be only informed for it's own thread. This of course assumes
that the client created a LLVMContext for each thread.

This fixes <rdar://problem/16728690>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207430 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/IR/LegacyPassManager.cpp b/lib/IR/LegacyPassManager.cpp
index b6d75b483f..aea29fdc5b 100644
--- a/lib/IR/LegacyPassManager.cpp
+++ b/lib/IR/LegacyPassManager.cpp
@@ -16,6 +16,7 @@
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/LegacyPassManagers.h"
 #include "llvm/IR/LegacyPassNameParser.h"
+#include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
@@ -1313,6 +1314,8 @@ bool BBPassManager::runOnFunction(Function &F) {
         TimeRegion PassTimer(getPassTimer(BP));
 
         LocalChanged |= BP->runOnBasicBlock(*I);
+
+        F.getContext().notifyPassRun(BP, F.getParent(), &F, &*I);
       }
 
       Changed |= LocalChanged;
@@ -1551,6 +1554,8 @@ bool FPPassManager::runOnFunction(Function &F) {
     removeNotPreservedAnalysis(FP);
     recordAvailableAnalysis(FP);
     removeDeadPasses(FP, F.getName(), ON_FUNCTION_MSG);
+
+    F.getContext().notifyPassRun(FP, F.getParent(), &F);
   }
   return Changed;
 }
@@ -1630,6 +1635,8 @@ MPPassManager::runOnModule(Module &M) {
     removeNotPreservedAnalysis(MP);
     recordAvailableAnalysis(MP);
     removeDeadPasses(MP, M.getModuleIdentifier(), ON_MODULE_MSG);
+
+    M.getContext().notifyPassRun(MP, &M);
   }
 
   // Finalize module passes