[LTO] Discard names for values that are not global by default.

Rafael reported on the mailing list that this reduces peak memory
usage while linking llvm-as by 15%. It makes sense to make it
the default, and introduce an inverse knob -lto-no-discard-value-names
for those who want to restore the old behavior.

llvm-svn: 267020

1 files changed, 1 insertions, 1 deletions

diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index dc49530242d..89c12c64206 100644
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -289,7 +289,7 @@ void LinkerDriver::readConfigs(opt::InputArgList &Args) {
   Config->Demangle = !Args.hasArg(OPT_no_demangle);
   Config->DisableVerify = Args.hasArg(OPT_disable_verify);
   Config->DiscardAll = Args.hasArg(OPT_discard_all);
-  Config->DiscardValueNames = Args.hasArg(OPT_lto_discard_value_names);
+  Config->DiscardValueNames = !Args.hasArg(OPT_lto_no_discard_value_names);
   Config->DiscardLocals = Args.hasArg(OPT_discard_locals);
   Config->DiscardNone = Args.hasArg(OPT_discard_none);
   Config->EhFrameHdr = Args.hasArg(OPT_eh_frame_hdr);