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/CellSPU/SPUSubtarget.h

@@ -26,6 +26,7 @@ namespace llvm {
 
   namespace SPU {
     enum {
+      PROC_NONE,
       DEFAULT_PROC
     };
   }

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",

lib/Target/PowerPC/PPCSubtarget.cpp

@@ -60,6 +60,7 @@ PPCSubtarget::PPCSubtarget(const TargetMachine &tm, const Module &M,
                            const std::string &FS, bool is64Bit)
   : TM(tm)
   , StackAlignment(16)
+  , DarwinDirective(PPC::DIR_NONE)
   , IsGigaProcessor(false)
   , Has64BitSupport(false)
   , Use64BitRegs(false)

lib/Target/PowerPC/PPCSubtarget.h

@@ -27,6 +27,7 @@ namespace llvm {
 namespace PPC {
   // -m directive values.
   enum {
+    DIR_NONE,
     DIR_32,
     DIR_601, 
     DIR_602, 

utils/TableGen/SubtargetEmitter.cpp

@@ -482,8 +482,12 @@ void SubtargetEmitter::ParseFeaturesFunction(std::ostream &OS) {
     const std::string &Value = R->getValueAsString("Value");
     const std::string &Attribute = R->getValueAsString("Attribute");
 
+    if (Value=="true" || Value=="false")
       OS << "  if ((Bits & " << Instance << ") != 0) "
          << Attribute << " = " << Value << ";\n";
+    else
+      OS << "  if ((Bits & " << Instance << ") != 0 && " << Attribute << 
+            " < " << Value << ") " << Attribute << " = " << Value << ";\n";
   }
 
   if (HasItineraries) {