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Code Issues Projects Releases Wiki Activity

1. Simplify the gathering of node groups.

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2. Printing node groups when displaying nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23573 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2005-10-01 00:03:07 +00:00
parent 242f2557cc
commit 41755e2c7e
1 changed files with 22 additions and 54 deletions
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76
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
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@ -448,56 +448,8 @@ private:
};
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
class FlagUserIterator {
private:
SDNode *Definer; // Node defining flag
SDNode::use_iterator UI; // User node iterator
SDNode::use_iterator E; // End of user nodes
unsigned MinRes; // Minimum flag result
public:
// Ctor.
FlagUserIterator(SDNode *D)
: Definer(D)
, UI(D->use_begin())
, E(D->use_end())
, MinRes(D->getNumValues()) {
// Find minimum flag result.
while (MinRes && D->getValueType(MinRes - 1) == MVT::Flag) --MinRes;
}
/// isFlagUser - Return true if node uses definer's flag.
bool isFlagUser(SDNode *U) {
// For each operand (in reverse to only look at flags)
for (unsigned N = U->getNumOperands(); 0 < N--;) {
// Get operand
SDOperand Op = U->getOperand(N);
// Not user if there are no flags
if (Op.getValueType() != MVT::Flag) return false;
// Return true if it is one of the flag results
if (Op.Val == Definer && Op.ResNo >= MinRes) return true;
}
// Not a flag user
return false;
}
SDNode *next() {
// Continue to next user
while (UI != E) {
// Next user node
SDNode *User = *UI++;
// Return true if is a flag user
if (isFlagUser(User)) return User;
}
// No more user nodes
return NULL;
}
};
} // namespace
//===----------------------------------------------------------------------===//
@ -749,14 +701,20 @@ void SimpleSched::GatherNodeInfo() {
// Sum up all the latencies for max tally size
NSlots += NI->Latency;
}
// Put flagged nodes into groups
for (unsigned i = 0, N = NodeCount; i < N; i++) {
NodeInfo* NI = &Info[i];
SDNode *Node = NI->Node;
if (isFlagDefiner(Node)) {
FlagUserIterator FI(Node);
while (SDNode *User = FI.next()) NodeGroup::Add(NI, getNI(User));
// For each operand (in reverse to only look at flags)
for (unsigned N = Node->getNumOperands(); 0 < N--;) {
// Get operand
SDOperand Op = Node->getOperand(N);
// No more flags to walk
if (Op.getValueType() != MVT::Flag) break;
// Add do node group
NodeGroup::Add(getNI(Op.Val), NI);
}
}
}
@ -1293,8 +1251,18 @@ void SimpleSched::print(std::ostream &O) const {
using namespace std;
O << "Ordering\n";
for (unsigned i = 0, N = Ordering.size(); i < N; i++) {
printSI(O, Ordering[i]);
NodeInfo *NI = Ordering[i];
printSI(O, NI);
O << "\n";
if (NI->isGroupLeader()) {
NodeGroup *Group = NI->Group;
for (NIIterator NII = Group->begin(), E = Group->end();
NII != E; NII++) {
O << " ";
printSI(O, *NII);
O << "\n";
}
}
}
#endif
}