}
}
+ if tcx.sess.opts.debugging_opts.pgo_gen.is_some() {
+ // These are weak symbols that point to the profile version and the
+ // profile name, which need to be treated as exported so LTO doesn't nix
+ // them.
+ const PROFILER_WEAK_SYMBOLS: [&'static str; 2] = [
+ "__llvm_profile_raw_version",
+ "__llvm_profile_filename",
+ ];
+ for sym in &PROFILER_WEAK_SYMBOLS {
+ let exported_symbol = ExportedSymbol::NoDefId(SymbolName::new(sym));
+ symbols.push((exported_symbol, SymbolExportLevel::C));
+ }
+ }
+
if tcx.sess.crate_types.borrow().contains(&config::CrateTypeDylib) {
let symbol_name = metadata_symbol_name(tcx);
let exported_symbol = ExportedSymbol::NoDefId(SymbolName::new(&symbol_name));
--- /dev/null
+-include ../tools.mk
+
+all:
+ifeq ($(PROFILER_SUPPORT),1)
+ $(RUSTC) -Copt-level=3 -Clto=fat -Z pgo-gen=test.profraw test.rs
+ $(call RUN,test) || exit 1
+ [ -e "$(TMPDIR)/test.profraw" ] || (echo "No .profraw file"; exit 1)
+endif
--- /dev/null
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {}