From 4e335c6c71143acfa561d5d1ce89e71567c1fa12 Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Fri, 23 Feb 2007 00:10:16 +0000 Subject: Add LPPassManager interface that LoopPass can use to skip rest of the passes in the queue for a loop. llvm-svn: 34508 --- llvm/lib/Analysis/LoopPass.cpp | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'llvm/lib/Analysis/LoopPass.cpp') diff --git a/llvm/lib/Analysis/LoopPass.cpp b/llvm/lib/Analysis/LoopPass.cpp index 95a18e5b00d..22d542b05ba 100644 --- a/llvm/lib/Analysis/LoopPass.cpp +++ b/llvm/lib/Analysis/LoopPass.cpp @@ -57,6 +57,13 @@ LPPassManager::~LPPassManager() { delete LQ; } +/// Delete loop from the loop queue. This is used by Loop pass to inform +/// Loop Pass Manager that it should skip rest of the passes for this loop. +void LPPassManager::deleteLoopFromQueue(Loop *L) { + // Do not pop loop from LQ here. It will be done by runOnFunction while loop. + skipThisLoop = true; +} + // Recurse through all subloops and all loops into LQ. static void addLoopIntoQueue(Loop *L, LoopQueue *LQ) { for (Loop::iterator I = L->begin(), E = L->end(); I != E; ++I) @@ -81,6 +88,8 @@ bool LPPassManager::runOnFunction(Function &F) { while (!LQ->empty()) { Loop *L = LQ->top(); + skipThisLoop = false; + // Run all passes on current SCC for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) { @@ -107,6 +116,10 @@ bool LPPassManager::runOnFunction(Function &F) { removeNotPreservedAnalysis(P); recordAvailableAnalysis(P); removeDeadPasses(P, Msg2); + + if (skipThisLoop) + // Do not run other passes on this loop. + break; } // Pop the loop from queue after running all passes. -- cgit v1.2.3