When a loop is deleted, immediately release all of the active

LoopPasses for that loop. This avoids trouble with the PassManager
trying to call verifyAnalysis on them, and frees up some memory
sooner rather than later.

llvm-svn: 82945

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/LoopPass.cpp b/llvm/lib/Analysis/LoopPass.cpp
index 08615c4e14e..4f7018da1ac 100644
--- a/llvm/lib/Analysis/LoopPass.cpp
+++ b/llvm/lib/Analysis/LoopPass.cpp
@@ -253,6 +253,15 @@ bool LPPassManager::runOnFunction(Function &F) {
         break;
     }
     
+    // If the loop was deleted, release all the loop passes. This frees up
+    // some memory, and avoids trouble with the pass manager trying to call
+    // verifyAnalysis on them.
+    if (skipThisLoop)
+      for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {  
+        Pass *P = getContainedPass(Index);
+        freePass(P, "", ON_LOOP_MSG);
+      }
+
     // Pop the loop from queue after running all passes.
     LQ.pop_back();