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Machine model: Generate table entries for super-resources. 

Super-resources and resource groups are two ways of expressing
overlapping sets of processor resources. Now we generate table entries
the same way for both so the scheduler never needs to explicitly check
for super-resources.

llvm-svn: 180162
This commit is contained in:
Andrew Trick 2013-04-23 23:45:16 +00:00
parent cf398b220d
commit a3801a39de
1 changed files with 23 additions and 14 deletions
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37
llvm/utils/TableGen/SubtargetEmitter.cpp
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@ -782,29 +782,38 @@ Record *SubtargetEmitter::FindReadAdvance(const CodeGenSchedRW &SchedRead,
}
// Expand an explicit list of processor resources into a full list of implied
// resource groups that cover them.
//
// FIXME: Effectively consider a super-resource a group that include all of its
// subresources to allow mixing and matching super-resources and groups.
//
// FIXME: Warn if two overlapping groups don't have a common supergroup.
// resource groups and super resources that cover them.
void SubtargetEmitter::ExpandProcResources(RecVec &PRVec,
std::vector<int64_t> &Cycles,
const CodeGenProcModel &ProcModel) {
const CodeGenProcModel &PM) {
// Default to 1 resource cycle.
Cycles.resize(PRVec.size(), 1);
for (unsigned i = 0, e = PRVec.size(); i != e; ++i) {
Record *PRDef = PRVec[i];
RecVec SubResources;
if (PRVec[i]->isSubClassOf("ProcResGroup")) {
SubResources = PRVec[i]->getValueAsListOfDefs("Resources");
}
if (PRDef->isSubClassOf("ProcResGroup"))
SubResources = PRDef->getValueAsListOfDefs("Resources");
else {
SubResources.push_back(PRVec[i]);
SubResources.push_back(PRDef);
PRDef = SchedModels.findProcResUnits(PRVec[i], PM);
for (Record *SubDef = PRDef;
SubDef->getValueInit("Super")->isComplete();) {
if (SubDef->isSubClassOf("ProcResGroup")) {
// Disallow this for simplicitly.
PrintFatalError(SubDef->getLoc(), "Processor resource group "
" cannot be a super resources.");
}
Record *SuperDef =
SchedModels.findProcResUnits(SubDef->getValueAsDef("Super"), PM);
PRVec.push_back(SuperDef);
Cycles.push_back(Cycles[i]);
SubDef = SuperDef;
}
}
for (RecIter PRI = ProcModel.ProcResourceDefs.begin(),
PRE = ProcModel.ProcResourceDefs.end();
for (RecIter PRI = PM.ProcResourceDefs.begin(),
PRE = PM.ProcResourceDefs.end();
PRI != PRE; ++PRI) {
if (*PRI == PRVec[i] || !(*PRI)->isSubClassOf("ProcResGroup"))
if (*PRI == PRDef || !(*PRI)->isSubClassOf("ProcResGroup"))
continue;
RecVec SuperResources = (*PRI)->getValueAsListOfDefs("Resources");
RecIter SubI = SubResources.begin(), SubE = SubResources.end();