mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-26 21:32:10 +00:00
f32616e0bd
enclosing namespace. Caught by clang++. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91480 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
//===- MachineLoopInfo.cpp - Natural Loop Calculator ----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the MachineLoopInfo class that is used to identify natural
|
|
// loops and determine the loop depth of various nodes of the CFG. Note that
|
|
// the loops identified may actually be several natural loops that share the
|
|
// same header node... not just a single natural loop.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/MachineLoopInfo.h"
|
|
#include "llvm/CodeGen/MachineDominators.h"
|
|
#include "llvm/CodeGen/Passes.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>
|
|
X("machine-loops", "Machine Natural Loop Construction", true);
|
|
|
|
const PassInfo *const llvm::MachineLoopInfoID = &X;
|
|
|
|
bool MachineLoopInfo::runOnMachineFunction(MachineFunction &) {
|
|
releaseMemory();
|
|
LI.Calculate(getAnalysis<MachineDominatorTree>().getBase()); // Update
|
|
return false;
|
|
}
|
|
|
|
void MachineLoopInfo::getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
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;
|
|
}
|