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Add support to globaldce for deleting dead function prototypes

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6918 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-06-26 05:41:18 +00:00
parent 81d4e14449
commit b12b75365a
1 changed files with 7 additions and 1 deletions
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8
lib/Transforms/IPO/GlobalDCE.cpp
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@ -46,13 +46,19 @@ namespace {
// Nothing to do if no unreachable functions have been found... // Nothing to do if no unreachable functions have been found...
if (FunctionsToDelete.empty()) return false; if (FunctionsToDelete.empty()) return false;
// Unreachables functions have been found and should have no references to // Unreachable functions have been found and should have no references to
// them, delete them now. // them, delete them now.
// //
for (std::vector<CallGraphNode*>::iterator I = FunctionsToDelete.begin(), for (std::vector<CallGraphNode*>::iterator I = FunctionsToDelete.begin(),
E = FunctionsToDelete.end(); I != E; ++I) E = FunctionsToDelete.end(); I != E; ++I)
delete CallGraph.removeFunctionFromModule(*I); delete CallGraph.removeFunctionFromModule(*I);
// Walk the function list, removing prototypes for functions which are not
// used.
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (I->use_size() == 0 && I->isExternal())
delete CallGraph.removeFunctionFromModule(I);
return true; return true;
} }