mirror of
https://github.com/c64scene-ar/llvm-6502.git
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into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
148 lines
4.5 KiB
C++
148 lines
4.5 KiB
C++
//===- llvm/Support/InstIterator.h - Classes for inst iteration -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains definitions of two iterators for iterating over the
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// instructions in a function. This is effectively a wrapper around a two level
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// iterator that can probably be genericized later.
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//
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// Note that this iterator gets invalidated any time that basic blocks or
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// instructions are moved around.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_INSTITERATOR_H
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#define LLVM_SUPPORT_INSTITERATOR_H
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Function.h"
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namespace llvm {
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// This class implements inst_begin() & inst_end() for
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// inst_iterator and const_inst_iterator's.
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//
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template <class _BB_t, class _BB_i_t, class _BI_t, class _II_t>
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class InstIterator {
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typedef _BB_t BBty;
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typedef _BB_i_t BBIty;
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typedef _BI_t BIty;
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typedef _II_t IIty;
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_BB_t *BBs; // BasicBlocksType
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_BB_i_t BB; // BasicBlocksType::iterator
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_BI_t BI; // BasicBlock::iterator
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public:
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typedef std::bidirectional_iterator_tag iterator_category;
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typedef IIty value_type;
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typedef signed difference_type;
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typedef IIty* pointer;
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typedef IIty& reference;
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// Default constructor
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InstIterator() {}
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// Copy constructor...
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template<typename A, typename B, typename C, typename D>
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InstIterator(const InstIterator<A,B,C,D> &II)
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: BBs(II.BBs), BB(II.BB), BI(II.BI) {}
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template<typename A, typename B, typename C, typename D>
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InstIterator(InstIterator<A,B,C,D> &II)
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: BBs(II.BBs), BB(II.BB), BI(II.BI) {}
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template<class M> InstIterator(M &m)
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: BBs(&m.getBasicBlockList()), BB(BBs->begin()) { // begin ctor
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if (BB != BBs->end()) {
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BI = BB->begin();
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advanceToNextBB();
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}
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}
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template<class M> InstIterator(M &m, bool)
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: BBs(&m.getBasicBlockList()), BB(BBs->end()) { // end ctor
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}
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// Accessors to get at the underlying iterators...
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inline BBIty &getBasicBlockIterator() { return BB; }
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inline BIty &getInstructionIterator() { return BI; }
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inline reference operator*() const { return *BI; }
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inline pointer operator->() const { return &operator*(); }
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inline bool operator==(const InstIterator &y) const {
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return BB == y.BB && (BB == BBs->end() || BI == y.BI);
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}
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inline bool operator!=(const InstIterator& y) const {
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return !operator==(y);
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}
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InstIterator& operator++() {
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++BI;
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advanceToNextBB();
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return *this;
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}
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inline InstIterator operator++(int) {
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InstIterator tmp = *this; ++*this; return tmp;
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}
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InstIterator& operator--() {
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while (BB == BBs->end() || BI == BB->begin()) {
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--BB;
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BI = BB->end();
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}
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--BI;
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return *this;
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}
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inline InstIterator operator--(int) {
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InstIterator tmp = *this; --*this; return tmp;
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}
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inline bool atEnd() const { return BB == BBs->end(); }
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private:
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inline void advanceToNextBB() {
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// The only way that the II could be broken is if it is now pointing to
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// the end() of the current BasicBlock and there are successor BBs.
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while (BI == BB->end()) {
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++BB;
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if (BB == BBs->end()) break;
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BI = BB->begin();
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}
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}
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};
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typedef InstIterator<iplist<BasicBlock>,
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Function::iterator, BasicBlock::iterator,
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Instruction> inst_iterator;
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typedef InstIterator<const iplist<BasicBlock>,
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Function::const_iterator,
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BasicBlock::const_iterator,
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const Instruction> const_inst_iterator;
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inline inst_iterator inst_begin(Function *F) { return inst_iterator(*F); }
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inline inst_iterator inst_end(Function *F) { return inst_iterator(*F, true); }
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inline const_inst_iterator inst_begin(const Function *F) {
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return const_inst_iterator(*F);
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}
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inline const_inst_iterator inst_end(const Function *F) {
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return const_inst_iterator(*F, true);
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}
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inline inst_iterator inst_begin(Function &F) { return inst_iterator(F); }
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inline inst_iterator inst_end(Function &F) { return inst_iterator(F, true); }
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inline const_inst_iterator inst_begin(const Function &F) {
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return const_inst_iterator(F);
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}
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inline const_inst_iterator inst_end(const Function &F) {
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return const_inst_iterator(F, true);
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}
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} // End llvm namespace
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#endif
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