Driver: Add support for -m[no-]relax-all, and make it the default at -O0.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104815 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 896811d..ab00f96 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -768,6 +768,15 @@
CmdArgs.push_back("-E");
} else if (isa<AssembleJobAction>(JA)) {
CmdArgs.push_back("-emit-obj");
+
+ // At -O0, we use -mrelax-all by default.
+ bool IsOpt = false;
+ if (Arg *A = Args.getLastArg(options::OPT_O_Group))
+ IsOpt = !A->getOption().matches(options::OPT_O0);
+ if (Args.hasFlag(options::OPT_mrelax_all,
+ options::OPT_mno_relax_all,
+ !IsOpt))
+ CmdArgs.push_back("-mrelax-all");
} else if (isa<PrecompileJobAction>(JA)) {
// Use PCH if the user requested it, except for C++ (for now).
bool UsePCH = D.CCCUsePCH;
@@ -1512,6 +1521,15 @@
CmdArgs.push_back("-filetype");
CmdArgs.push_back("obj");
+ // At -O0, we use -mrelax-all by default.
+ bool IsOpt = false;
+ if (Arg *A = Args.getLastArg(options::OPT_O_Group))
+ IsOpt = !A->getOption().matches(options::OPT_O0);
+ if (Args.hasFlag(options::OPT_mrelax_all,
+ options::OPT_mno_relax_all,
+ !IsOpt))
+ CmdArgs.push_back("-mrelax-all");
+
// FIXME: Add -force_cpusubtype_ALL support, once we have it.
// FIXME: Add -g support, once we have it.