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Provide two overloads of AnalyzeNewNode.

Browse Source 
The first can update the SDNode in an SDValue
while the second is called with SDNode* and
returns a possibly updated SDNode*.

This patch has no intended functional impact,
but helps eliminating ugly temporary SDValues.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55608 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gabor Greif 2008-09-01 15:10:19 +00:00
parent 1189f3ac3b
commit ed63214fcb
2 changed files with 23 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
View File

@ -221,11 +221,11 @@ NodeDone:
/// AnalyzeNewNode - The specified node is the root of a subtree of potentially
/// new nodes. Correct any processed operands (this may change the node) and
/// calculate the NodeId.
void DAGTypeLegalizer::AnalyzeNewNode(SDValue &Val) {
SDNode * const N(Val.getNode());
/// Returns the potentially changed node.
SDNode *DAGTypeLegalizer::AnalyzeNewNode(SDNode *N) {
// If this was an existing node that is already done, we're done.
if (N->getNodeId() != NewNode)
return;
return N;
// Remove any stale map entries.
ExpungeNode(N);
@ -268,16 +268,26 @@ void DAGTypeLegalizer::AnalyzeNewNode(SDValue &Val) {
// Some operands changed - update the node.
if (!NewOps.empty())
Val.setNode(DAG.UpdateNodeOperands(SDValue(N, 0),
&NewOps[0],
NewOps.size()).getNode());
N = DAG.UpdateNodeOperands(SDValue(N, 0),
&NewOps[0],
NewOps.size()).getNode();
SDNode * const Nu(Val.getNode());
Nu->setNodeId(Nu->getNumOperands()-NumProcessed);
if (Nu->getNodeId() == ReadyToProcess)
Worklist.push_back(Nu);
N->setNodeId(N->getNumOperands()-NumProcessed);
if (N->getNodeId() == ReadyToProcess)
Worklist.push_back(N);
return N;
}
/// AnalyzeNewNode - call AnalyzeNewNode(SDNode *N)
/// and update the node in SDValue if necessary.
void DAGTypeLegalizer::AnalyzeNewNode(SDValue &Val) {
SDNode *N(Val.getNode());
SDNode *M(AnalyzeNewNode(N));
if (N != M)
Val.setNode(M);
}
namespace {
/// NodeUpdateListener - This class is a DAGUpdateListener that listens for
/// updates to nodes and recomputes their ready state.
@ -338,9 +348,7 @@ void DAGTypeLegalizer::ReplaceNodeWith(SDNode *From, SDNode *To) {
// If expansion produced new nodes, make sure they are properly marked.
ExpungeNode(From);
SDValue ToNode(To, 0);
AnalyzeNewNode(ToNode); // Expunges To.
To = ToNode.getNode();
To = AnalyzeNewNode(To); // Expunges To.
assert(From->getNumValues() == To->getNumValues() &&
"Node results don't match");

5
lib/CodeGen/SelectionDAG/LegalizeTypes.h
View File

@ -157,9 +157,7 @@ public:
/// for the specified node, adding it to the worklist if ready.
SDNode *ReanalyzeNode(SDNode *N) {
N->setNodeId(NewNode);
SDValue V(N, 0);
AnalyzeNewNode(V); // FIXME: ignore the change?
return V.getNode();
return AnalyzeNewNode(N);
}
void NoteDeletion(SDNode *Old, SDNode *New) {
@ -171,6 +169,7 @@ public:
private:
void AnalyzeNewNode(SDValue &Val);
SDNode *AnalyzeNewNode(SDNode *N);
void ReplaceValueWith(SDValue From, SDValue To);
void ReplaceNodeWith(SDNode *From, SDNode *To);