From b12b75365a11e0a626b9826bff4e68272d808f19 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 26 Jun 2003 05:41:18 +0000 Subject: [PATCH] Add support to globaldce for deleting dead function prototypes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6918 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/IPO/GlobalDCE.cpp | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/lib/Transforms/IPO/GlobalDCE.cpp b/lib/Transforms/IPO/GlobalDCE.cpp index 55ef5d42207..c7fddc99139 100644 --- a/lib/Transforms/IPO/GlobalDCE.cpp +++ b/lib/Transforms/IPO/GlobalDCE.cpp @@ -46,12 +46,18 @@ namespace { // Nothing to do if no unreachable functions have been found... 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. // for (std::vector::iterator I = FunctionsToDelete.begin(), E = FunctionsToDelete.end(); I != E; ++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; }