Re-implement the main strength-reduction portion of LoopStrengthReduction.

[oota-llvm.git] / lib / Analysis / LoopPass.cpp

diff --git a/lib/Analysis/LoopPass.cpp b/lib/Analysis/LoopPass.cpp
index e297ab420731f7976c5aad9270603c710a2ed205..43463cd8ef1cc6c13537b56facb61bb38c400f2e 100644 (file)
--- a/lib/Analysis/LoopPass.cpp
+++ b/lib/Analysis/LoopPass.cpp
@@ -224,7 +224,8 @@ bool LPPassManager::runOnFunction(Function &F) {
     for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {  
       Pass *P = getContainedPass(Index);
 
-      dumpPassInfo(P, EXECUTION_MSG, ON_LOOP_MSG, "");
+      dumpPassInfo(P, EXECUTION_MSG, ON_LOOP_MSG,
+                   CurrentLoop->getHeader()->getNameStr());
       dumpRequiredSet(P);
 
       initializeAnalysisImpl(P);
@@ -239,18 +240,31 @@ bool LPPassManager::runOnFunction(Function &F) {
       }
 
       if (Changed)
-        dumpPassInfo(P, MODIFICATION_MSG, ON_LOOP_MSG, "");
+        dumpPassInfo(P, MODIFICATION_MSG, ON_LOOP_MSG,
+                     skipThisLoop ? "<deleted>" :
+                                    CurrentLoop->getHeader()->getNameStr());
       dumpPreservedSet(P);
 
-      if (!skipThisLoop)
+      if (!skipThisLoop) {
+        // Manually check that this loop is still healthy. This is done
+        // instead of relying on LoopInfo::verifyLoop since LoopInfo
+        // is a function pass and it's really expensive to verify every
+        // loop in the function every time. That level of checking can be
+        // enabled with the -verify-loop-info option.
+        Timer *T = StartPassTimer(LI);
+        CurrentLoop->verifyLoop();
+        StopPassTimer(LI, T);
+
+        // Then call the regular verifyAnalysis functions.
         verifyPreservedAnalysis(LP);
+      }
 
       removeNotPreservedAnalysis(P);
       recordAvailableAnalysis(P);
-      removeDeadPasses(P, "", ON_LOOP_MSG);
-
-      // If dominator information is available then verify the info if requested.
-      verifyDomInfo(*LP, F);
+      removeDeadPasses(P,
+                       skipThisLoop ? "<deleted>" :
+                                      CurrentLoop->getHeader()->getNameStr(),
+                       ON_LOOP_MSG);
 
       if (skipThisLoop)
         // Do not run other passes on this loop.
@@ -263,7 +277,7 @@ bool LPPassManager::runOnFunction(Function &F) {
     if (skipThisLoop)
       for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {  
         Pass *P = getContainedPass(Index);
-        freePass(P, "", ON_LOOP_MSG);
+        freePass(P, "<deleted>", ON_LOOP_MSG);
       }
 
     // Pop the loop from queue after running all passes.