[SystemZ] Add -mbackchain option.
This option, like the corresponding gcc option, is SystemZ-specific and
enables storing frame backchain links, as specified in the ABI.
Differential Revision: http://reviews.llvm.org/D19891
llvm-svn: 268575
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 1cc1369..c688763 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1655,6 +1655,12 @@
}
}
+void Clang::AddSystemZTargetArgs(const ArgList &Args,
+ ArgStringList &CmdArgs) const {
+ if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false))
+ CmdArgs.push_back("-mbackchain");
+}
+
static const char *getSystemZTargetCPU(const ArgList &Args) {
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
return A->getValue();
@@ -4241,6 +4247,10 @@
AddSparcTargetArgs(Args, CmdArgs);
break;
+ case llvm::Triple::systemz:
+ AddSystemZTargetArgs(Args, CmdArgs);
+ break;
+
case llvm::Triple::x86:
case llvm::Triple::x86_64:
AddX86TargetArgs(Args, CmdArgs);