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Iterating over sets of pointers in a heuristic was a bad idea. Switching

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any command line paramater changed the register allocation produced by
PBQP.

Turns out variety is not the spice of life.

Fixed some comparators, added others. All good now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108613 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2010-07-17 06:31:41 +00:00
parent dc1ad22d53
commit d0f6f01731
2 changed files with 12 additions and 8 deletions
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8
lib/CodeGen/PBQP/Heuristics/Briggs.h
View File

@ -52,9 +52,7 @@ namespace PBQP {
bool operator()(Graph::NodeItr n1Itr, Graph::NodeItr n2Itr) const {
if (s->getSolverDegree(n1Itr) > s->getSolverDegree(n2Itr))
return true;
if (s->getSolverDegree(n1Itr) < s->getSolverDegree(n2Itr))
return false;
return (&*n1Itr < &*n2Itr);
return false;
}
private:
HeuristicSolverImpl<Briggs> *s;
@ -69,9 +67,7 @@ namespace PBQP {
cost2 = g->getNodeCosts(n2Itr)[0] / s->getSolverDegree(n2Itr);
if (cost1 < cost2)
return true;
if (cost1 > cost2)
return false;
return (&*n1Itr < &*n2Itr);
return false;
}
private:

12
lib/CodeGen/RegAllocPBQP.cpp
View File

@ -104,7 +104,15 @@ namespace {
virtual bool runOnMachineFunction(MachineFunction &MF);
private:
typedef std::map<const LiveInterval*, unsigned> LI2NodeMap;
class LIOrdering {
public:
bool operator()(const LiveInterval *li1, const LiveInterval *li2) const {
return li1->reg < li2->reg;
}
};
typedef std::map<const LiveInterval*, unsigned, LIOrdering> LI2NodeMap;
typedef std::vector<const LiveInterval*> Node2LIMap;
typedef std::vector<unsigned> AllowedSet;
typedef std::vector<AllowedSet> AllowedSetMap;
@ -112,7 +120,7 @@ namespace {
typedef std::pair<unsigned, unsigned> RegPair;
typedef std::map<RegPair, PBQP::PBQPNum> CoalesceMap;
typedef std::set<LiveInterval*> LiveIntervalSet;
typedef std::set<LiveInterval*, LIOrdering> LiveIntervalSet;
typedef std::vector<PBQP::Graph::NodeItr> NodeVector;