-/// Return the datalayout string of a subtarget.
-static std::string getDataLayoutString(const Triple &T) {
- bool is64Bit = T.getArch() == Triple::ppc64 || T.getArch() == Triple::ppc64le;
- std::string Ret;
-
- // Most PPC* platforms are big endian, PPC64LE is little endian.
- if (T.getArch() == Triple::ppc64le)
- Ret = "e";
- else
- Ret = "E";
-
- Ret += DataLayout::getManglingComponent(T);
-
- // PPC32 has 32 bit pointers. The PS3 (OS Lv2) is a PPC64 machine with 32 bit
- // pointers.
- if (!is64Bit || T.getOS() == Triple::Lv2)
- Ret += "-p:32:32";
-
- // Note, the alignment values for f64 and i64 on ppc64 in Darwin
- // documentation are wrong; these are correct (i.e. "what gcc does").
- if (is64Bit || !T.isOSDarwin())
- Ret += "-i64:64";
- else
- Ret += "-f64:32:64";
-
- // PPC64 has 32 and 64 bit registers, PPC32 has only 32 bit ones.
- if (is64Bit)
- Ret += "-n32:64";
- else
- Ret += "-n32";
-
- return Ret;
-}
+static cl::opt<bool> UseSubRegLiveness("ppc-track-subreg-liveness",
+cl::desc("Enable subregister liveness tracking for PPC"), cl::Hidden);