vendor/llvm/llvm-trunk-r290819

1 files changed, 24 insertions, 2 deletions

diff --git a/include/llvm/Transforms/Utils/ModuleUtils.h b/include/llvm/Transforms/Utils/ModuleUtils.h
index 2eb2b1363b0b..27508799f8e0 100644
--- a/include/llvm/Transforms/Utils/ModuleUtils.h
+++ b/include/llvm/Transforms/Utils/ModuleUtils.h
@@ -55,9 +55,31 @@ std::pair<Function *, Function *> createSanitizerCtorAndInitFunctions(
     ArrayRef<Type *> InitArgTypes, ArrayRef<Value *> InitArgs,
     StringRef VersionCheckName = StringRef());
 
-/// Rename all the anon functions in the module using a hash computed from
+/// Rename all the anon globals in the module using a hash computed from
 /// the list of public globals in the module.
-bool nameUnamedFunctions(Module &M);
+bool nameUnamedGlobals(Module &M);
+
+/// \brief Adds global values to the llvm.used list.
+void appendToUsed(Module &M, ArrayRef<GlobalValue *> Values);
+
+/// \brief Adds global values to the llvm.compiler.used list.
+void appendToCompilerUsed(Module &M, ArrayRef<GlobalValue *> Values);
+
+/// Filter out potentially dead comdat functions where other entries keep the
+/// entire comdat group alive.
+///
+/// This is designed for cases where functions appear to become dead but remain
+/// alive due to other live entries in their comdat group.
+///
+/// The \p DeadComdatFunctions container should only have pointers to
+/// `Function`s which are members of a comdat group and are believed to be
+/// dead.
+///
+/// After this routine finishes, the only remaining `Function`s in \p
+/// DeadComdatFunctions are those where every member of the comdat is listed
+/// and thus removing them is safe (provided *all* are removed).
+void filterDeadComdatFunctions(
+    Module &M, SmallVectorImpl<Function *> &DeadComdatFunctions);
 
 } // End llvm namespace