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fix crashes when we only have a prototype for main.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20627 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -85,7 +85,7 @@ bool BUDataStructures::runOnModule(Module &M) {
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// Merge the globals variables (not the calls) from the globals graph back
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// into the main function's graph so that the main function contains all of
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// the information about global pools and GV usage in the program.
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if (MainFunc) {
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if (MainFunc && !MainFunc->isExternal()) {
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DSGraph &MainGraph = getOrCreateGraph(MainFunc);
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const DSGraph &GG = *MainGraph.getGlobalsGraph();
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ReachabilityCloner RC(MainGraph, GG,
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@ -94,7 +94,7 @@ bool CompleteBUDataStructures::runOnModule(Module &M) {
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// Merge the globals variables (not the calls) from the globals graph back
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// into the main function's graph so that the main function contains all of
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// the information about global pools and GV usage in the program.
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if (MainFunc) {
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if (MainFunc && !MainFunc->isExternal()) {
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DSGraph &MainGraph = getOrCreateGraph(*MainFunc);
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const DSGraph &GG = *MainGraph.getGlobalsGraph();
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ReachabilityCloner RC(MainGraph, GG,
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@ -106,7 +106,7 @@ bool EquivClassGraphs::runOnModule(Module &M) {
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// Merge the globals variables (not the calls) from the globals graph back
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// into the main function's graph so that the main function contains all of
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// the information about global pools and GV usage in the program.
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if (MainFunc) {
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if (MainFunc && !MainFunc->isExternal()) {
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DSGraph &MainGraph = getOrCreateGraph(*MainFunc);
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const DSGraph &GG = *MainGraph.getGlobalsGraph();
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ReachabilityCloner RC(MainGraph, GG,
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