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Pull Interval class out of LiveIntervals.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13910 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2004-05-30 07:46:27 +00:00
parent 1da7e8e0b3
commit 6924063bf2
4 changed files with 129 additions and 152 deletions
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include/llvm/CodeGen/LiveIntervalAnalysis.h
+51 -61
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@@ -30,62 +30,60 @@ namespace llvm {
class MRegisterInfo;
class VirtRegMap;
struct Interval {
typedef std::pair<unsigned, unsigned> Range;
typedef std::vector<Range> Ranges;
unsigned reg; // the register of this interval
float weight; // weight of this interval:
// (number of uses *10^loopDepth)
Ranges ranges; // the ranges in which this register is live
explicit Interval(unsigned r);
bool empty() const { return ranges.empty(); }
bool spilled() const;
unsigned start() const {
assert(!empty() && "empty interval for register");
return ranges.front().first;
}
unsigned end() const {
assert(!empty() && "empty interval for register");
return ranges.back().second;
}
bool expiredAt(unsigned index) const {
return end() <= (index + 1);
}
bool liveAt(unsigned index) const;
bool overlaps(const Interval& other) const;
void addRange(unsigned start, unsigned end);
void join(const Interval& other);
bool operator<(const Interval& other) const {
return start() < other.start();
}
bool operator==(const Interval& other) const {
return reg == other.reg;
}
private:
Ranges::iterator mergeRangesForward(Ranges::iterator it);
Ranges::iterator mergeRangesBackward(Ranges::iterator it);
};
std::ostream& operator<<(std::ostream& os, const Interval& li);
class LiveIntervals : public MachineFunctionPass
{
public:
struct Interval {
typedef std::pair<unsigned, unsigned> Range;
typedef std::vector<Range> Ranges;
unsigned reg; // the register of this interval
float weight; // weight of this interval (number of uses
// * 10^loopDepth)
Ranges ranges; // the ranges in which this register is live
Interval(unsigned r);
bool empty() const { return ranges.empty(); }
bool spilled() const;
unsigned start() const {
assert(!empty() && "empty interval for register");
return ranges.front().first;
}
unsigned end() const {
assert(!empty() && "empty interval for register");
return ranges.back().second;
}
bool expiredAt(unsigned index) const {
return end() <= (index + 1);
}
bool liveAt(unsigned index) const;
bool overlaps(const Interval& other) const;
void addRange(unsigned start, unsigned end);
void join(const Interval& other);
private:
Ranges::iterator mergeRangesForward(Ranges::iterator it);
Ranges::iterator mergeRangesBackward(Ranges::iterator it);
};
struct StartPointComp {
bool operator()(const Interval& lhs, const Interval& rhs) {
return lhs.ranges.front().first < rhs.ranges.front().first;
}
};
struct StartPointPtrComp {
bool operator()(const Interval* lhs, const Interval* rhs) {
return lhs->ranges.front().first < rhs->ranges.front().first;
}
};
typedef std::list<Interval> Intervals;
private:
@@ -205,14 +203,6 @@ namespace llvm {
void printRegName(unsigned reg) const;
};
inline bool operator==(const LiveIntervals::Interval& lhs,
const LiveIntervals::Interval& rhs) {
return lhs.reg == rhs.reg;
}
std::ostream& operator<<(std::ostream& os,
const LiveIntervals::Interval& li);
} // End llvm namespace
#endif