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Change the "Cannot merge two portions of the same node yet" from an assertion

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into a "oh crap, lets collapse" case


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4530 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-11-04 06:48:26 +00:00
parent 4d5f10f8d6
commit 02606637e0
1 changed files with 13 additions and 6 deletions
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19
lib/Analysis/DataStructure/DataStructure.cpp
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@ -347,18 +347,25 @@ void DSNode::mergeWith(const DSNodeHandle &NH, unsigned Offset) {
if (N == 0 || (N == this && NH.getOffset() == Offset))
return; // Noop
assert(NH.getNode() != this &&
"Cannot merge two portions of the same node yet!");
if (N == this) {
std::cerr << "WARNING: Cannot merge two portions of the same node yet, so we collapse instead!\n";
N->foldNodeCompletely();
return;
}
// If we are merging a node with a completely folded node, then both nodes are
// now completely folded.
//
if (isNodeCompletelyFolded()) {
N->foldNodeCompletely();
} else if (NH.getNode()->isNodeCompletelyFolded()) {
if (!N->isNodeCompletelyFolded())
N->foldNodeCompletely();
} else if (N->isNodeCompletelyFolded()) {
foldNodeCompletely();
Offset = 0;
}
N = NH.getNode();
if (this == N) return;
// If both nodes are not at offset 0, make sure that we are merging the node
// at an later offset into the node with the zero offset.
@ -401,7 +408,7 @@ void DSNode::mergeWith(const DSNodeHandle &NH, unsigned Offset) {
DSNodeHandle &Ref = *N->Referrers.back();
Ref = DSNodeHandle(this, NOffset+Ref.getOffset());
}
// We must merge fields in this node due to nodes merged in the source node.
// In order to handle this we build a map that converts from the source node's
// MergeMap values to our MergeMap values. This map is indexed by the
@ -440,7 +447,7 @@ void DSNode::mergeWith(const DSNodeHandle &NH, unsigned Offset) {
//
for (unsigned i = 0, e = NSize; i != e; ++i)
if (DSNodeHandle *Link = N->getLink(i)) {
addEdgeTo(i+NOffset, *Link);
addEdgeTo((i+NOffset) % getSize(), *Link);
N->MergeMap[i] = -1; // Kill outgoing edge
}