Add support for the PowerPC 64-bit SVR4 ABI.

The Link Register is volatile when using the 32-bit SVR4 ABI.
Make it possible to use the 64-bit SVR4 ABI.
Add non-volatile registers for the 64-bit SVR4 ABI.
Make sure r2 is a reserved register when using the 64-bit SVR4 ABI.
Update PPCFrameInfo for the 64-bit SVR4 ABI.
Add FIXME for 64-bit Darwin PPC.
Insert NOP instruction after direct function calls.
Emit official procedure descriptors.
Create TOC entries for GlobalAddress references.
Spill 64-bit non-volatile registers to the correct slots.
Only custom lower VAARG when using the 32-bit SVR4 ABI.
Use simple VASTART lowering for the 64-bit SVR4 ABI.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCSubtarget.h b/lib/Target/PowerPC/PPCSubtarget.h
index 6787390..02c8ad7 100644
--- a/lib/Target/PowerPC/PPCSubtarget.h
+++ b/lib/Target/PowerPC/PPCSubtarget.h
@@ -138,8 +138,9 @@
   /// getDarwinVers - Return the darwin version number, 8 = tiger, 9 = leopard.
   unsigned getDarwinVers() const { return DarwinVers; }
 
-  bool isDarwinABI() const { return isDarwin() || IsPPC64; }
-  bool isSVR4ABI() const { return !isDarwin() && !IsPPC64; }
+  bool isDarwinABI() const { return isDarwin(); }
+  bool isSVR4ABI() const { return !isDarwin(); }
+
 };
 } // End llvm namespace