/usr/include/llvm-3.6/llvm/Analysis/ConstantsScanner.h is in llvm-3.6-dev 1:3.6-2ubuntu1~trusty2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | //==- llvm/Analysis/ConstantsScanner.h - Iterate over constants -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class implements an iterator to walk through the constants referenced by
// a method. This is used by the Bitcode & Assembly writers to build constant
// pools.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_CONSTANTSSCANNER_H
#define LLVM_ANALYSIS_CONSTANTSSCANNER_H
#include "llvm/IR/InstIterator.h"
namespace llvm {
class Constant;
class constant_iterator : public std::iterator<std::forward_iterator_tag,
const Constant, ptrdiff_t> {
const_inst_iterator InstI; // Method instruction iterator
unsigned OpIdx; // Operand index
typedef constant_iterator _Self;
inline bool isAtConstant() const {
assert(!InstI.atEnd() && OpIdx < InstI->getNumOperands() &&
"isAtConstant called with invalid arguments!");
return isa<Constant>(InstI->getOperand(OpIdx));
}
public:
inline constant_iterator(const Function *F) : InstI(inst_begin(F)), OpIdx(0) {
// Advance to first constant... if we are not already at constant or end
if (InstI != inst_end(F) && // InstI is valid?
(InstI->getNumOperands() == 0 || !isAtConstant())) // Not at constant?
operator++();
}
inline constant_iterator(const Function *F, bool) // end ctor
: InstI(inst_end(F)), OpIdx(0) {
}
inline bool operator==(const _Self& x) const { return OpIdx == x.OpIdx &&
InstI == x.InstI; }
inline bool operator!=(const _Self& x) const { return !operator==(x); }
inline pointer operator*() const {
assert(isAtConstant() && "Dereferenced an iterator at the end!");
return cast<Constant>(InstI->getOperand(OpIdx));
}
inline pointer operator->() const { return operator*(); }
inline _Self& operator++() { // Preincrement implementation
++OpIdx;
do {
unsigned NumOperands = InstI->getNumOperands();
while (OpIdx < NumOperands && !isAtConstant()) {
++OpIdx;
}
if (OpIdx < NumOperands) return *this; // Found a constant!
++InstI;
OpIdx = 0;
} while (!InstI.atEnd());
return *this; // At the end of the method
}
inline _Self operator++(int) { // Postincrement
_Self tmp = *this; ++*this; return tmp;
}
inline bool atEnd() const { return InstI.atEnd(); }
};
inline constant_iterator constant_begin(const Function *F) {
return constant_iterator(F);
}
inline constant_iterator constant_end(const Function *F) {
return constant_iterator(F, true);
}
} // End llvm namespace
#endif
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