diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/IPO/PruneEH.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/IPO/PruneEH.cpp b/lib/Transforms/IPO/PruneEH.cpp index ceb9e3e54e..d2f3a8437c 100644 --- a/lib/Transforms/IPO/PruneEH.cpp +++ b/lib/Transforms/IPO/PruneEH.cpp @@ -64,6 +64,8 @@ bool PruneEH::runOnSCC(const std::vector<CallGraphNode *> &SCC) { // Next, check to see if any callees might throw or if there are any external // functions in this SCC: if so, we cannot prune any functions in this SCC. + // Definitions that are weak and not declared non-throwing might be + // overridden at linktime with something that throws, so assume that. // If this SCC includes the unwind instruction, we KNOW it throws, so // obviously the SCC might throw. // @@ -71,7 +73,7 @@ bool PruneEH::runOnSCC(const std::vector<CallGraphNode *> &SCC) { for (unsigned i = 0, e = SCC.size(); (!SCCMightUnwind || !SCCMightReturn) && i != e; ++i) { Function *F = SCC[i]->getFunction(); - if (F == 0) { + if (F == 0 || (F->hasWeakLinkage() && !F->doesNotThrow())) { SCCMightUnwind = true; SCCMightReturn = true; } else if (F->isDeclaration()) { |