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Add LPPassManager interface that LoopPass can use to skip

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rest of the passes in the queue for a loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2007-02-23 00:10:16 +00:00
parent 7d35c0e2b9
commit 5afdc7d785
2 changed files with 19 additions and 1 deletions
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7
include/llvm/Analysis/LoopPass.h
View File

@ -81,8 +81,13 @@ public:
return PMT_LoopPassManager;
}
private:
public:
// 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 deleteLoopFromQueue(Loop *L);
private:
LoopQueue *LQ;
bool skipThisLoop;
};

13
lib/Analysis/LoopPass.cpp
View File

@ -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.