Discard unused runtime function declarations (for readability).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59594 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 3e14621..dd46f91 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -72,6 +72,12 @@
llvm::Function *Fn = RuntimeFunctions[i].first;
const std::string &Name = RuntimeFunctions[i].second;
+ // Discard unused runtime functions.
+ if (Fn->use_empty()) {
+ Fn->eraseFromParent();
+ continue;
+ }
+
// See if there is a conflict against a function.
llvm::Function *Conflict = TheModule.getFunction(Name);
if (Conflict) {