mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
Avoid referencing deleted DSgraphs when merging an SCC into a larger SCC. This
fixes the crash in 176.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11033 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
08cec00588
commit
a67138ddff
@ -152,7 +152,7 @@ unsigned BUDataStructures::calculateGraphs(Function *F,
|
||||
} else {
|
||||
// SCCFunctions - Keep track of the functions in the current SCC
|
||||
//
|
||||
hash_set<Function*> SCCFunctions;
|
||||
hash_set<DSGraph*> SCCGraphs;
|
||||
|
||||
Function *NF;
|
||||
std::vector<Function*>::iterator FirstInSCC = Stack.end();
|
||||
@ -160,36 +160,38 @@ unsigned BUDataStructures::calculateGraphs(Function *F,
|
||||
do {
|
||||
NF = *--FirstInSCC;
|
||||
ValMap[NF] = ~0U;
|
||||
SCCFunctions.insert(NF);
|
||||
|
||||
// Figure out which graph is the largest one, in order to speed things up
|
||||
// a bit in situations where functions in the SCC have widely different
|
||||
// graph sizes.
|
||||
DSGraph &NFGraph = getDSGraph(*NF);
|
||||
SCCGraphs.insert(&NFGraph);
|
||||
if (!SCCGraph || SCCGraph->getGraphSize() < NFGraph.getGraphSize())
|
||||
SCCGraph = &NFGraph;
|
||||
} while (NF != F);
|
||||
|
||||
std::cerr << "Calculating graph for SCC #: " << MyID << " of size: "
|
||||
<< SCCFunctions.size() << "\n";
|
||||
<< SCCGraphs.size() << "\n";
|
||||
|
||||
// Compute the Max SCC Size...
|
||||
if (MaxSCC < SCCFunctions.size())
|
||||
MaxSCC = SCCFunctions.size();
|
||||
if (MaxSCC < SCCGraphs.size())
|
||||
MaxSCC = SCCGraphs.size();
|
||||
|
||||
// First thing first, collapse all of the DSGraphs into a single graph for
|
||||
// the entire SCC. We computed the largest graph, so clone all of the other
|
||||
// (smaller) graphs into it. Discard all of the old graphs.
|
||||
//
|
||||
for (hash_set<Function*>::iterator I = SCCFunctions.begin(),
|
||||
E = SCCFunctions.end(); I != E; ++I) {
|
||||
DSGraph &G = getDSGraph(**I);
|
||||
for (hash_set<DSGraph*>::iterator I = SCCGraphs.begin(),
|
||||
E = SCCGraphs.end(); I != E; ++I) {
|
||||
DSGraph &G = **I;
|
||||
if (&G != SCCGraph) {
|
||||
DSGraph::NodeMapTy NodeMap;
|
||||
SCCGraph->cloneInto(G, SCCGraph->getScalarMap(),
|
||||
SCCGraph->getReturnNodes(), NodeMap);
|
||||
// Update the DSInfo map and delete the old graph...
|
||||
DSInfo[*I] = SCCGraph;
|
||||
for (DSGraph::ReturnNodesTy::iterator I = G.getReturnNodes().begin(),
|
||||
E = G.getReturnNodes().end(); I != E; ++I)
|
||||
DSInfo[I->first] = SCCGraph;
|
||||
delete &G;
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user