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Fix indeterminism in MI scheduler DAG construction. 

Similarly to several recent fixes throughout the code replace std::map use with the MapVector.
Add find() method to the MapVector.

llvm-svn: 168051
This commit is contained in:
Sergei Larin 2012-11-15 17:45:50 +00:00
parent 262465c126
commit e822148c80
2 changed files with 27 additions and 15 deletions
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12
llvm/include/llvm/ADT/MapVector.h
View File

@ -83,6 +83,18 @@ public:
typename MapType::const_iterator Pos = Map.find(Key);
return Pos == Map.end()? 0 : 1;
}
iterator find(const KeyT &Key) {
typename MapType::const_iterator Pos = Map.find(Key);
return Pos == Map.end()? Vector.end() :
(Vector.begin() + Pos->second);
}
const_iterator find(const KeyT &Key) const {
typename MapType::const_iterator Pos = Map.find(Key);
return Pos == Map.end()? Vector.end() :
(Vector.begin() + Pos->second);
}
};
}

30
llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
View File

@ -33,6 +33,7 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallPtrSet.h"
using namespace llvm;
@ -685,8 +686,8 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
// so that they can be given more precise dependencies. We track
// separately the known memory locations that may alias and those
// that are known not to alias
std::map<const Value *, SUnit *> AliasMemDefs, NonAliasMemDefs;
std::map<const Value *, std::vector<SUnit *> > AliasMemUses, NonAliasMemUses;
MapVector<const Value *, SUnit *> AliasMemDefs, NonAliasMemDefs;
MapVector<const Value *, std::vector<SUnit *> > AliasMemUses, NonAliasMemUses;
std::set<SUnit*> RejectMemNodes;
// Remove any stale debug info; sometimes BuildSchedGraph is called again
@ -765,11 +766,11 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
if (isGlobalMemoryObject(AA, MI)) {
// Be conservative with these and add dependencies on all memory
// references, even those that are known to not alias.
for (std::map<const Value *, SUnit *>::iterator I =
for (MapVector<const Value *, SUnit *>::iterator I =
NonAliasMemDefs.begin(), E = NonAliasMemDefs.end(); I != E; ++I) {
I->second->addPred(SDep(SU, SDep::Barrier));
}
for (std::map<const Value *, std::vector<SUnit *> >::iterator I =
for (MapVector<const Value *, std::vector<SUnit *> >::iterator I =
NonAliasMemUses.begin(), E = NonAliasMemUses.end(); I != E; ++I) {
for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
SDep Dep(SU, SDep::Barrier);
@ -803,10 +804,10 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
for (unsigned k = 0, m = PendingLoads.size(); k != m; ++k)
addChainDependency(AA, MFI, SU, PendingLoads[k], RejectMemNodes,
TrueMemOrderLatency);
for (std::map<const Value *, SUnit *>::iterator I = AliasMemDefs.begin(),
for (MapVector<const Value *, SUnit *>::iterator I = AliasMemDefs.begin(),
E = AliasMemDefs.end(); I != E; ++I)
addChainDependency(AA, MFI, SU, I->second, RejectMemNodes);
for (std::map<const Value *, std::vector<SUnit *> >::iterator I =
for (MapVector<const Value *, std::vector<SUnit *> >::iterator I =
AliasMemUses.begin(), E = AliasMemUses.end(); I != E; ++I) {
for (unsigned i = 0, e = I->second.size(); i != e; ++i)
addChainDependency(AA, MFI, SU, I->second[i], RejectMemNodes,
@ -823,13 +824,12 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
// A store to a specific PseudoSourceValue. Add precise dependencies.
// Record the def in MemDefs, first adding a dep if there is
// an existing def.
std::map<const Value *, SUnit *>::iterator I =
MapVector<const Value *, SUnit *>::iterator I =
((MayAlias) ? AliasMemDefs.find(V) : NonAliasMemDefs.find(V));
std::map<const Value *, SUnit *>::iterator IE =
MapVector<const Value *, SUnit *>::iterator IE =
((MayAlias) ? AliasMemDefs.end() : NonAliasMemDefs.end());
if (I != IE) {
addChainDependency(AA, MFI, SU, I->second, RejectMemNodes,
0, true);
addChainDependency(AA, MFI, SU, I->second, RejectMemNodes, 0, true);
I->second = SU;
} else {
if (MayAlias)
@ -838,9 +838,9 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
NonAliasMemDefs[V] = SU;
}
// Handle the uses in MemUses, if there are any.
std::map<const Value *, std::vector<SUnit *> >::iterator J =
MapVector<const Value *, std::vector<SUnit *> >::iterator J =
((MayAlias) ? AliasMemUses.find(V) : NonAliasMemUses.find(V));
std::map<const Value *, std::vector<SUnit *> >::iterator JE =
MapVector<const Value *, std::vector<SUnit *> >::iterator JE =
((MayAlias) ? AliasMemUses.end() : NonAliasMemUses.end());
if (J != JE) {
for (unsigned i = 0, e = J->second.size(); i != e; ++i)
@ -885,9 +885,9 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
if (const Value *V =
getUnderlyingObjectForInstr(MI, MFI, MayAlias)) {
// A load from a specific PseudoSourceValue. Add precise dependencies.
std::map<const Value *, SUnit *>::iterator I =
MapVector<const Value *, SUnit *>::iterator I =
((MayAlias) ? AliasMemDefs.find(V) : NonAliasMemDefs.find(V));
std::map<const Value *, SUnit *>::iterator IE =
MapVector<const Value *, SUnit *>::iterator IE =
((MayAlias) ? AliasMemDefs.end() : NonAliasMemDefs.end());
if (I != IE)
addChainDependency(AA, MFI, SU, I->second, RejectMemNodes, 0, true);
@ -898,7 +898,7 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
} else {
// A load with no underlying object. Depend on all
// potentially aliasing stores.
for (std::map<const Value *, SUnit *>::iterator I =
for (MapVector<const Value *, SUnit *>::iterator I =
AliasMemDefs.begin(), E = AliasMemDefs.end(); I != E; ++I)
addChainDependency(AA, MFI, SU, I->second, RejectMemNodes);