2001-06-24 04:07:44 +00:00
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//===- IntervalPartition.cpp - Interval Partition module code ----*- C++ -*--=//
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//
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2002-04-28 16:21:30 +00:00
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// This file contains the definition of the IntervalPartition class, which
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2002-04-07 20:49:59 +00:00
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// calculates and represent the interval partition of a function.
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2001-06-24 04:07:44 +00:00
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/IntervalIterator.h"
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2001-11-27 00:03:19 +00:00
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#include "Support/STLExtras.h"
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2001-06-24 04:07:44 +00:00
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2002-01-20 22:54:45 +00:00
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using std::make_pair;
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2001-06-24 04:07:44 +00:00
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2002-07-26 21:12:44 +00:00
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static RegisterAnalysis<IntervalPartition>
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2002-07-30 16:27:52 +00:00
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X("intervals", "Interval Partition Construction", true);
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2002-07-26 21:12:44 +00:00
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2002-07-27 01:12:17 +00:00
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AnalysisID IntervalPartition::ID = X;
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2002-01-31 00:42:27 +00:00
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2001-06-24 04:07:44 +00:00
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//===----------------------------------------------------------------------===//
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// IntervalPartition Implementation
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//===----------------------------------------------------------------------===//
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2002-04-07 20:49:59 +00:00
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// destroy - Reset state back to before function was analyzed
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2002-01-31 00:42:27 +00:00
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void IntervalPartition::destroy() {
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2002-08-09 22:52:08 +00:00
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for_each(Intervals.begin(), Intervals.end(), deleter<Interval>);
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2002-01-31 00:42:27 +00:00
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IntervalMap.clear();
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RootInterval = 0;
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2001-06-24 04:07:44 +00:00
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}
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2002-07-31 19:32:01 +00:00
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void IntervalPartition::print(std::ostream &O) const {
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2002-08-09 22:52:08 +00:00
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std::copy(Intervals.begin(), Intervals.end(),
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std::ostream_iterator<const Interval *>(O, "\n"));
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}
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2001-06-25 03:55:04 +00:00
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// addIntervalToPartition - Add an interval to the internal list of intervals,
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// and then add mappings from all of the basic blocks in the interval to the
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// interval itself (in the IntervalMap).
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2001-06-24 04:07:44 +00:00
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//
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2001-06-25 03:55:04 +00:00
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void IntervalPartition::addIntervalToPartition(Interval *I) {
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2002-08-09 22:52:08 +00:00
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Intervals.push_back(I);
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2001-06-24 04:07:44 +00:00
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// Add mappings for all of the basic blocks in I to the IntervalPartition
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for (Interval::node_iterator It = I->Nodes.begin(), End = I->Nodes.end();
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It != End; ++It)
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2001-06-25 03:55:04 +00:00
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IntervalMap.insert(make_pair(*It, I));
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2001-06-24 04:07:44 +00:00
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}
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// updatePredecessors - Interval generation only sets the successor fields of
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// the interval data structures. After interval generation is complete,
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// run through all of the intervals and propogate successor info as
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// predecessor info.
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//
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void IntervalPartition::updatePredecessors(Interval *Int) {
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2001-06-24 04:07:44 +00:00
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BasicBlock *Header = Int->getHeaderNode();
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for (Interval::succ_iterator I = Int->Successors.begin(),
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E = Int->Successors.end(); I != E; ++I)
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getBlockInterval(*I)->Predecessors.push_back(Header);
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}
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// IntervalPartition ctor - Build the first level interval partition for the
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2002-04-07 20:49:59 +00:00
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// specified function...
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2001-06-24 04:07:44 +00:00
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//
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2002-06-25 16:13:24 +00:00
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bool IntervalPartition::runOnFunction(Function &F) {
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2001-06-25 03:55:04 +00:00
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// Pass false to intervals_begin because we take ownership of it's memory
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2002-06-25 16:13:24 +00:00
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function_interval_iterator I = intervals_begin(&F, false);
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assert(I != intervals_end(&F) && "No intervals in function!?!?!");
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2001-06-24 04:07:44 +00:00
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2001-06-25 03:55:04 +00:00
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addIntervalToPartition(RootInterval = *I);
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2001-06-27 23:41:11 +00:00
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++I; // After the first one...
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// Add the rest of the intervals to the partition...
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2002-06-25 16:13:24 +00:00
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for_each(I, intervals_end(&F),
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2001-06-27 23:41:11 +00:00
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bind_obj(this, &IntervalPartition::addIntervalToPartition));
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2001-06-24 04:07:44 +00:00
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// Now that we know all of the successor information, propogate this to the
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// predecessors for each block...
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2002-08-09 22:52:08 +00:00
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for_each(Intervals.begin(), Intervals.end(),
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2001-06-27 23:41:11 +00:00
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bind_obj(this, &IntervalPartition::updatePredecessors));
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2002-01-31 00:42:27 +00:00
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return false;
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2001-06-24 04:07:44 +00:00
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}
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// IntervalPartition ctor - Build a reduced interval partition from an
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// existing interval graph. This takes an additional boolean parameter to
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// distinguish it from a copy constructor. Always pass in false for now.
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//
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2001-06-25 03:55:04 +00:00
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IntervalPartition::IntervalPartition(IntervalPartition &IP, bool) {
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2002-04-07 20:49:59 +00:00
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Interval *FunctionStart = IP.getRootInterval();
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assert(FunctionStart && "Cannot operate on empty IntervalPartitions!");
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2001-06-24 04:07:44 +00:00
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2001-06-25 03:55:04 +00:00
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// Pass false to intervals_begin because we take ownership of it's memory
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interval_part_interval_iterator I = intervals_begin(IP, false);
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2001-06-27 23:41:11 +00:00
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assert(I != intervals_end(IP) && "No intervals in interval partition!?!?!");
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2001-06-25 03:55:04 +00:00
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addIntervalToPartition(RootInterval = *I);
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2001-06-27 23:41:11 +00:00
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++I; // After the first one...
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// Add the rest of the intervals to the partition...
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for_each(I, intervals_end(IP),
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bind_obj(this, &IntervalPartition::addIntervalToPartition));
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2001-06-24 04:07:44 +00:00
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// Now that we know all of the successor information, propogate this to the
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// predecessors for each block...
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2002-08-09 22:52:08 +00:00
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for_each(Intervals.begin(), Intervals.end(),
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2001-06-27 23:41:11 +00:00
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bind_obj(this, &IntervalPartition::updatePredecessors));
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2001-06-24 04:07:44 +00:00
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}
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