//
//===----------------------------------------------------------------------===//
//
-// This file implements the pass that optimize code placement and align loop
-// headers to target specific alignment boundary.
+// This file implements the pass that optimizes code placement and aligns loop
+// headers to target-specific alignment boundaries.
//
//===----------------------------------------------------------------------===//
public:
static char ID;
- CodePlacementOpt() : MachineFunctionPass(&ID) {}
+ CodePlacementOpt() : MachineFunctionPass(ID) {}
virtual bool runOnMachineFunction(MachineFunction &MF);
- virtual const char *getPassName() const {
- return "Code Placement Optimizater";
- }
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<MachineLoopInfo>();
char CodePlacementOpt::ID = 0;
} // end anonymous namespace
-FunctionPass *llvm::createCodePlacementOptPass() {
- return new CodePlacementOpt();
-}
+char &llvm::CodePlacementOptID = CodePlacementOpt::ID;
+INITIALIZE_PASS(CodePlacementOpt, "code-placement",
+ "Code Placement Optimizer", false, false)
/// HasFallthrough - Test whether the given branch has a fallthrough, either as
/// a plain fallthrough or as a fallthrough case of a conditional branch.
continue;
// Move the block.
+ DEBUG(dbgs() << "CGP: Moving blocks starting at BB#" << Pred->getNumber()
+ << " to top of loop.\n");
Changed = true;
// Move it and all the blocks that can reach it via fallthrough edges
// Determine a position to move orphaned loop blocks to. If TopMBB is not
// entered via fallthrough and BotMBB is exited via fallthrough, prepend them
- // to the top of the loop to avoid loosing that fallthrough. Otherwise append
+ // to the top of the loop to avoid losing that fallthrough. Otherwise append
// them to the bottom, even if it previously had a fallthrough, on the theory
// that it's worth an extra branch to keep the loop contiguous.
MachineFunction::iterator InsertPt =
continue;
// Move the block.
+ DEBUG(dbgs() << "CGP: Moving blocks starting at BB#" << BB->getNumber()
+ << " to be contiguous with loop.\n");
Changed = true;
// Process this block and all loop blocks contiguous with it, to keep