1 files changed, 21 insertions, 0 deletions
diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index 76e24faebd9..4ac341a12e4 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -219,3 +219,24 @@ LLVMRustRunRestrictionPass(LLVMModuleRef M, char **symbols, size_t len) {
     passes.add(llvm::createInternalizePass(ref));
     passes.run(*unwrap(M));
 }
+
+extern "C" void
+LLVMRustMarkAllFunctionsNounwind(LLVMModuleRef M) {
+    for (Module::iterator GV = unwrap(M)->begin(),
+         E = unwrap(M)->end(); GV != E; ++GV) {
+        GV->setDoesNotThrow();
+        Function *F = dyn_cast<Function>(GV);
+        if (F == NULL)
+            continue;
+
+        for (Function::iterator B = F->begin(), BE = F->end(); B != BE; ++B) {
+            for (BasicBlock::iterator I = B->begin(), IE = B->end();
+                 I != IE; ++I) {
+                if (isa<InvokeInst>(I)) {
+                    InvokeInst *CI = cast<InvokeInst>(I);
+                    CI->setDoesNotThrow();
+                }
+            }
+        }
+    }
+}