mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-18 10:31:57 +00:00
ecd94c804a
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36873 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
//=- llvm/Analysis/PostDominators.h - Post Dominator Calculation-*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file exposes interfaces to post dominance information.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_POST_DOMINATORS_H
|
|
#define LLVM_ANALYSIS_POST_DOMINATORS_H
|
|
|
|
#include "llvm/Analysis/Dominators.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
|
|
/// compute the a post-dominator tree.
|
|
///
|
|
struct PostDominatorTree : public DominatorTreeBase {
|
|
static char ID; // Pass identification, replacement for typeid
|
|
|
|
PostDominatorTree() :
|
|
DominatorTreeBase((intptr_t)&ID, true) {}
|
|
|
|
virtual bool runOnFunction(Function &F) {
|
|
reset(); // Reset from the last time we were run...
|
|
calculate(F);
|
|
return false;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
}
|
|
private:
|
|
void calculate(Function &F);
|
|
Node *getNodeForBlock(BasicBlock *BB);
|
|
unsigned DFSPass(BasicBlock *V, InfoRec &VInfo,unsigned N);
|
|
void Compress(BasicBlock *V, InfoRec &VInfo);
|
|
BasicBlock *Eval(BasicBlock *V);
|
|
void Link(BasicBlock *V, BasicBlock *W, InfoRec &WInfo);
|
|
|
|
inline BasicBlock *getIDom(BasicBlock *BB) const {
|
|
std::map<BasicBlock*, BasicBlock*>::const_iterator I = IDoms.find(BB);
|
|
return I != IDoms.end() ? I->second : 0;
|
|
}
|
|
};
|
|
|
|
|
|
/// PostETForest Class - Concrete subclass of ETForestBase that is used to
|
|
/// compute a forwards post-dominator ET-Forest.
|
|
struct PostETForest : public ETForestBase {
|
|
static char ID;
|
|
PostETForest() : ETForestBase((intptr_t)&ID, true) {}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
AU.addRequired<PostDominatorTree>();
|
|
}
|
|
|
|
virtual bool runOnFunction(Function &F) {
|
|
reset(); // Reset from the last time we were run...
|
|
PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
|
|
Roots = DT.getRoots();
|
|
calculate(DT);
|
|
return false;
|
|
}
|
|
|
|
void calculate(const PostDominatorTree &DT);
|
|
ETNode *getNodeForBlock(BasicBlock *BB);
|
|
};
|
|
|
|
|
|
/// PostDominanceFrontier Class - Concrete subclass of DominanceFrontier that is
|
|
/// used to compute the a post-dominance frontier.
|
|
///
|
|
struct PostDominanceFrontier : public DominanceFrontierBase {
|
|
static char ID;
|
|
PostDominanceFrontier()
|
|
: DominanceFrontierBase((intptr_t) &ID, true) {}
|
|
|
|
virtual bool runOnFunction(Function &) {
|
|
Frontiers.clear();
|
|
PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
|
|
Roots = DT.getRoots();
|
|
if (const DominatorTree::Node *Root = DT.getRootNode())
|
|
calculate(DT, Root);
|
|
return false;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
AU.addRequired<PostDominatorTree>();
|
|
}
|
|
|
|
private:
|
|
const DomSetType &calculate(const PostDominatorTree &DT,
|
|
const DominatorTree::Node *Node);
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
// Make sure that any clients of this file link in PostDominators.cpp
|
|
FORCE_DEFINING_FILE_TO_BE_LINKED(PostDominanceFrontier)
|
|
|
|
#endif
|