LLVM API Documentation
#include <LoopInfo.h>
Inheritance diagram for llvm::LoopInfo:
Public Types | |
typedef std::vector< Loop * >::const_iterator | iterator |
Public Member Functions | |
~LoopInfo () | |
iterator | begin () const |
iterator | end () const |
Loop * | getLoopFor (const BasicBlock *BB) const |
const Loop * | operator[] (const BasicBlock *BB) const |
unsigned | getLoopDepth (const BasicBlock *BB) const |
bool | isLoopHeader (BasicBlock *BB) const |
virtual bool | runOnFunction (Function &F) |
virtual void | releaseMemory () |
void | print (std::ostream &O, const Module *=0) const |
virtual void | getAnalysisUsage (AnalysisUsage &AU) const |
Loop * | removeLoop (iterator I) |
void | changeLoopFor (BasicBlock *BB, Loop *L) |
void | changeTopLevelLoop (Loop *OldLoop, Loop *NewLoop) |
void | addTopLevelLoop (Loop *New) |
void | removeBlock (BasicBlock *BB) |
Friends | |
class | Loop |
Definition at line 223 of file LoopInfo.h.
typedef std::vector<Loop*>::const_iterator llvm::LoopInfo::iterator |
iterator/begin/end - The interface to the top-level loops in the current function.
Definition at line 234 of file LoopInfo.h.
llvm::LoopInfo::~LoopInfo | ( | ) | [inline] |
iterator llvm::LoopInfo::begin | ( | ) | const [inline] |
Definition at line 235 of file LoopInfo.h.
Referenced by llvm::ScalarEvolution::print(), and removeLoop().
iterator llvm::LoopInfo::end | ( | ) | const [inline] |
Definition at line 236 of file LoopInfo.h.
Referenced by llvm::ScalarEvolution::print(), and removeLoop().
Loop* llvm::LoopInfo::getLoopFor | ( | const BasicBlock * | BB | ) | const [inline] |
getLoopFor - Return the inner most loop that BB lives in. If a basic block is in no loop (for example the entry node), null is returned.
Definition at line 241 of file LoopInfo.h.
References BB.
Referenced by CloneLoop(), getLoopDepth(), isLoopHeader(), operator[](), llvm::ScalarEvolution::print(), llvm::SplitCriticalEdge(), and llvm::SCEVExpander::visitAddRecExpr().
const Loop* llvm::LoopInfo::operator[] | ( | const BasicBlock * | BB | ) | const [inline] |
operator[] - same as getLoopFor...
Definition at line 249 of file LoopInfo.h.
References BB, and getLoopFor().
unsigned llvm::LoopInfo::getLoopDepth | ( | const BasicBlock * | BB | ) | const [inline] |
getLoopDepth - Return the loop nesting level of the specified block...
Definition at line 255 of file LoopInfo.h.
References BB, llvm::Loop::getLoopDepth(), and getLoopFor().
Referenced by llvm::LiveIntervals::runOnMachineFunction().
bool llvm::LoopInfo::isLoopHeader | ( | BasicBlock * | BB | ) | const [inline] |
Definition at line 261 of file LoopInfo.h.
References BB, llvm::Loop::getHeader(), and getLoopFor().
bool LoopInfo::runOnFunction | ( | Function & | F | ) | [virtual] |
runOnFunction - Calculate the natural loop information.
Implements llvm::FunctionPass.
Definition at line 89 of file LoopInfo.cpp.
References releaseMemory().
void LoopInfo::releaseMemory | ( | ) | [virtual] |
releaseMemory() - This member can be implemented by a pass if it wants to be able to release its memory when it is no longer needed. The default behavior of passes is to hold onto memory for the entire duration of their lifetime (which is the entire compile time). For pipelined passes, this is not a big deal because that memory gets recycled every time the pass is invoked on another program unit. For IP passes, it is more important to free memory when it is unused.
Optionally implement this function to release pass memory when it is no longer used.
Reimplemented from llvm::Pass.
Definition at line 95 of file LoopInfo.cpp.
References E.
Referenced by runOnFunction(), and ~LoopInfo().
void LoopInfo::print | ( | std::ostream & | O, | |
const Module * | = 0 | |||
) | const [virtual] |
print - Print out the internal state of the pass. This is called by Analyze to print out the contents of an analysis. Otherwise it is not necessary to implement this method. Beware that the module pointer MAY be null. This automatically forwards to a virtual function that does not provide the Module* in case the analysis doesn't need it it can just be ignored.
Reimplemented from llvm::Pass.
Definition at line 119 of file LoopInfo.cpp.
References E.
Referenced by llvm::operator<<().
void LoopInfo::getAnalysisUsage | ( | AnalysisUsage & | AU | ) | const [virtual] |
getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job. If a pass specifies that it uses a particular analysis result to this function, it can then use the getAnalysis<AnalysisType>() function, below.
Reimplemented from llvm::Pass.
Definition at line 114 of file LoopInfo.cpp.
References llvm::AnalysisUsage::addRequired(), and llvm::AnalysisUsage::setPreservesAll().
removeLoop - This removes the specified top-level loop from this loop info object. The loop is not deleted, as it will presumably be inserted into another loop.
Definition at line 309 of file LoopInfo.cpp.
References begin(), end(), and llvm::Loop::getParentLoop().
void LoopInfo::changeLoopFor | ( | BasicBlock * | BB, | |
Loop * | L | |||
) |
changeLoopFor - Change the top-level loop that contains BB to the specified loop. This should be used by transformations that restructure the loop hierarchy tree.
Definition at line 289 of file LoopInfo.cpp.
References BB.
changeTopLevelLoop - Replace the specified loop in the top-level loops list with the indicated loop.
Definition at line 297 of file LoopInfo.cpp.
References llvm::Loop::ParentLoop.
void llvm::LoopInfo::addTopLevelLoop | ( | Loop * | New | ) | [inline] |
addTopLevelLoop - This adds the specified loop to the collection of top-level loops.
Definition at line 291 of file LoopInfo.h.
References llvm::Loop::getParentLoop().
Referenced by CloneLoop().
void LoopInfo::removeBlock | ( | BasicBlock * | BB | ) |
removeBlock - This method completely removes BB from all data structures, including all of the Loop objects it is nested in and our mapping from BasicBlocks to loops.
Definition at line 320 of file LoopInfo.cpp.
References BB, llvm::Loop::getParentLoop(), and llvm::Loop::removeBlockFromLoop().
friend class Loop [friend] |
Definition at line 227 of file LoopInfo.h.