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RegionInfo: Add helpers to replace entry/exit recursively

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Contributed by: Star Tan <tanmx_star@yeah.net>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179157 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tobias Grosser
2013-04-10 06:54:49 +00:00
parent 90dd7fd167
commit d03fdfb97c
2 changed files with 50 additions and 0 deletions
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lib/Analysis/RegionInfo.cpp
+32
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@@ -79,6 +79,38 @@ void Region::replaceExit(BasicBlock *BB) {
exit = BB;
}
void Region::replaceEntryRecursive(BasicBlock *NewEntry) {
std::vector<Region *> RegionQueue;
BasicBlock *OldEntry = getEntry();
RegionQueue.push_back(this);
while (!RegionQueue.empty()) {
Region *R = RegionQueue.back();
RegionQueue.pop_back();
R->replaceEntry(NewEntry);
for (Region::const_iterator RI = R->begin(), RE = R->end(); RI != RE; ++RI)
if ((*RI)->getEntry() == OldEntry)
RegionQueue.push_back(*RI);
}
}
void Region::replaceExitRecursive(BasicBlock *NewExit) {
std::vector<Region *> RegionQueue;
BasicBlock *OldExit = getExit();
RegionQueue.push_back(this);
while (!RegionQueue.empty()) {
Region *R = RegionQueue.back();
RegionQueue.pop_back();
R->replaceExit(NewExit);
for (Region::const_iterator RI = R->begin(), RE = R->end(); RI != RE; ++RI)
if ((*RI)->getExit() == OldExit)
RegionQueue.push_back(*RI);
}
}
bool Region::contains(const BasicBlock *B) const {
BasicBlock *BB = const_cast<BasicBlock*>(B);