[Driver] Pass -O* to the gold plugin via -plugin-opt
The gold plugin understands -O0..-O3, but these are not currently being passed to it.
llvm-svn: 256146
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 6947219..fd299ea 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1796,6 +1796,19 @@
if (!CPU.empty())
CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
+ if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
+ StringRef OOpt;
+ if (A->getOption().matches(options::OPT_O4) ||
+ A->getOption().matches(options::OPT_Ofast))
+ OOpt = "3";
+ else if (A->getOption().matches(options::OPT_O))
+ OOpt = A->getValue();
+ else if (A->getOption().matches(options::OPT_O0))
+ OOpt = "0";
+ if (!OOpt.empty())
+ CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
+ }
+
if (IsThinLTO)
CmdArgs.push_back("-plugin-opt=thinlto");
}