mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-28 22:29:56 +00:00
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
|
//===- MachinePostDominators.cpp -Machine Post Dominator Calculation ------===//
|
||
|
//
|
||
|
// The LLVM Compiler Infrastructure
|
||
|
//
|
||
|
// This file is distributed under the University of Illinois Open Source
|
||
|
// License. See LICENSE.TXT for details.
|
||
|
//
|
||
|
//===----------------------------------------------------------------------===//
|
||
|
//
|
||
|
// This file implements simple dominator construction algorithms for finding
|
||
|
// post dominators on machine functions.
|
||
|
//
|
||
|
//===----------------------------------------------------------------------===//
|
||
|
|
||
|
#include "llvm/CodeGen/MachinePostDominators.h"
|
||
|
|
||
|
using namespace llvm;
|
||
|
|
||
|
char MachinePostDominatorTree::ID = 0;
|
||
|
|
||
|
//declare initializeMachinePostDominatorTreePass
|
||
|
INITIALIZE_PASS(MachinePostDominatorTree, "machinepostdomtree",
|
||
|
"MachinePostDominator Tree Construction", true, true)
|
||
|
|
||
|
MachinePostDominatorTree::MachinePostDominatorTree() : MachineFunctionPass(ID) {
|
||
|
initializeMachinePostDominatorTreePass(*PassRegistry::getPassRegistry());
|
||
|
DT = new DominatorTreeBase<MachineBasicBlock>(true); //true indicate
|
||
|
// postdominator
|
||
|
}
|
||
|
|
||
|
FunctionPass *
|
||
|
MachinePostDominatorTree::createMachinePostDominatorTreePass() {
|
||
|
return new MachinePostDominatorTree();
|
||
|
}
|
||
|
|
||
|
bool
|
||
|
MachinePostDominatorTree::runOnMachineFunction(MachineFunction &F) {
|
||
|
DT->recalculate(F);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
MachinePostDominatorTree::~MachinePostDominatorTree() {
|
||
|
delete DT;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
MachinePostDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const {
|
||
|
AU.setPreservesAll();
|
||
|
MachineFunctionPass::getAnalysisUsage(AU);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
MachinePostDominatorTree::print(llvm::raw_ostream &OS, const Module *M) const {
|
||
|
DT->print(OS);
|
||
|
}
|