#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/Support/Debug.h"
using namespace llvm;
+namespace llvm {
#define MLB class LoopBase<MachineBasicBlock, MachineLoop>
TEMPLATE_INSTANTIATION(MLB);
#undef MLB
#define MLIB class LoopInfoBase<MachineBasicBlock, MachineLoop>
TEMPLATE_INSTANTIATION(MLIB);
#undef MLIB
+}
char MachineLoopInfo::ID = 0;
static RegisterPass<MachineLoopInfo>
AU.addRequired<MachineDominatorTree>();
MachineFunctionPass::getAnalysisUsage(AU);
}
+
+MachineBasicBlock *MachineLoop::getTopBlock() {
+ MachineBasicBlock *TopMBB = getHeader();
+ MachineFunction::iterator Begin = TopMBB->getParent()->begin();
+ if (TopMBB != Begin) {
+ MachineBasicBlock *PriorMBB = prior(MachineFunction::iterator(TopMBB));
+ while (contains(PriorMBB)) {
+ TopMBB = PriorMBB;
+ if (TopMBB == Begin) break;
+ PriorMBB = prior(MachineFunction::iterator(TopMBB));
+ }
+ }
+ return TopMBB;
+}
+
+MachineBasicBlock *MachineLoop::getBottomBlock() {
+ MachineBasicBlock *BotMBB = getHeader();
+ MachineFunction::iterator End = BotMBB->getParent()->end();
+ if (BotMBB != prior(End)) {
+ MachineBasicBlock *NextMBB = llvm::next(MachineFunction::iterator(BotMBB));
+ while (contains(NextMBB)) {
+ BotMBB = NextMBB;
+ if (BotMBB == llvm::next(MachineFunction::iterator(BotMBB))) break;
+ NextMBB = llvm::next(MachineFunction::iterator(BotMBB));
+ }
+ }
+ return BotMBB;
+}
+
+void MachineLoop::dump() const {
+ print(dbgs());
+}