Allow merging of statics generated by format!()

src/libsyntax/ext/format.rs

@@ -316,14 +316,19 @@ impl<'a, 'b> Context<'a, 'b> {
     /// These attributes are applied to all statics that this syntax extension
     /// will generate.
     fn static_attrs(&self) -> Vec<ast::Attribute> {
+        // Flag statics as `inline` so LLVM can merge duplicate globals as much
+        // as possible (which we're generating a whole lot of).
+        let unnamed = self.ecx.meta_word(self.fmtsp, InternedString::new("inline"));
+        let unnamed = self.ecx.attribute(self.fmtsp, unnamed);
+
         // Do not warn format string as dead code
         let dead_code = self.ecx.meta_word(self.fmtsp,
                                            InternedString::new("dead_code"));
         let allow_dead_code = self.ecx.meta_list(self.fmtsp,
                                                  InternedString::new("allow"),
                                                  vec!(dead_code));
         let allow_dead_code = self.ecx.attribute(self.fmtsp, allow_dead_code);
-        return vec!(allow_dead_code);
+        return vec!(unnamed, allow_dead_code);
     }
 
     fn rtpath(&self, s: &str) -> Vec<ast::Ident> {