Rewrite tblgen handling of subtarget features so

it follows the order of the enum, not alphabetical.
The motivation is to make -mattr=+ssse3,+sse41
select SSE41 as it ought to.  Added "ignored"
enum values of 0 to PPC and SPU to avoid compiler
warnings.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47143 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCAsmPrinter.cpp

@@ -849,6 +849,7 @@ bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
 
 bool DarwinAsmPrinter::doInitialization(Module &M) {
   static const char *CPUDirectives[] = {
+    "",
     "ppc",
     "ppc601",
     "ppc602",