[PowerPC] Rename DarwinDirective to CPUDirective (NFC)

Summary:
This patch renames the DarwinDirective (used to identify which CPU was defined)
to CPUDirective. It also adds the getCPUDirective() method and replaces all uses
of getDarwinDirective() with getCPUDirective().

Once this patch lands and downstream users of the getDarwinDirective() method
have switched to the getCPUDirective() method, the old getDarwinDirective()
method will be removed.

Reviewers: nemanjai, hfinkel, power-llvm-team, jsji, echristo, #powerpc, jhibbits

Reviewed By: hfinkel, jsji, jhibbits

Subscribers: hiraditya, shchenz, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70352

llvm/lib/Target/PowerPC/PPC.td

@@ -22,35 +22,35 @@ include "llvm/Target/Target.td"
 // CPU Directives                                                             //
 //===----------------------------------------------------------------------===//
 
-def Directive440 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_440", "">;
+def Directive440 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_440", "">;
-def Directive601 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_601", "">;
+def Directive601 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_601", "">;
-def Directive602 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_602", "">;
+def Directive602 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_602", "">;
-def Directive603 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_603", "">;
+def Directive603 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_603", "">;
-def Directive604 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_603", "">;
+def Directive604 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_603", "">;
-def Directive620 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_603", "">;
+def Directive620 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_603", "">;
-def Directive7400: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_7400", "">;
+def Directive7400: SubtargetFeature<"", "CPUDirective", "PPC::DIR_7400", "">;
-def Directive750 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_750", "">;
+def Directive750 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_750", "">;
-def Directive970 : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_970", "">;
+def Directive970 : SubtargetFeature<"", "CPUDirective", "PPC::DIR_970", "">;
-def Directive32  : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_32", "">;
+def Directive32  : SubtargetFeature<"", "CPUDirective", "PPC::DIR_32", "">;
-def Directive64  : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_64", "">;
+def Directive64  : SubtargetFeature<"", "CPUDirective", "PPC::DIR_64", "">;
-def DirectiveA2  : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_A2", "">;
+def DirectiveA2  : SubtargetFeature<"", "CPUDirective", "PPC::DIR_A2", "">;
-def DirectiveE500   : SubtargetFeature<"", "DarwinDirective",
+def DirectiveE500   : SubtargetFeature<"", "CPUDirective",
                                        "PPC::DIR_E500", "">;
-def DirectiveE500mc : SubtargetFeature<"", "DarwinDirective",
+def DirectiveE500mc : SubtargetFeature<"", "CPUDirective",
                                        "PPC::DIR_E500mc", "">;
-def DirectiveE5500  : SubtargetFeature<"", "DarwinDirective",
+def DirectiveE5500  : SubtargetFeature<"", "CPUDirective",
                                        "PPC::DIR_E5500", "">;
-def DirectivePwr3: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR3", "">;
+def DirectivePwr3: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR3", "">;
-def DirectivePwr4: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR4", "">;
+def DirectivePwr4: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR4", "">;
-def DirectivePwr5: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR5", "">;
+def DirectivePwr5: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR5", "">;
 def DirectivePwr5x
-    : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR5X", "">;
+    : SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR5X", "">;
-def DirectivePwr6: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR6", "">;
+def DirectivePwr6: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR6", "">;
 def DirectivePwr6x
-    : SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR6X", "">;
+    : SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR6X", "">;
-def DirectivePwr7: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR7", "">;
+def DirectivePwr7: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR7", "">;
-def DirectivePwr8: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR8", "">;
+def DirectivePwr8: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR8", "">;
-def DirectivePwr9: SubtargetFeature<"", "DarwinDirective", "PPC::DIR_PWR9", "">;
+def DirectivePwr9: SubtargetFeature<"", "CPUDirective", "PPC::DIR_PWR9", "">;
 
 def Feature64Bit     : SubtargetFeature<"64bit","Has64BitSupport", "true",
                                         "Enable 64-bit instructions">;

llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp

@@ -1611,8 +1611,8 @@ void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
   unsigned Directive = PPC::DIR_NONE;
   for (const Function &F : M) {
     const PPCSubtarget &STI = TM.getSubtarget<PPCSubtarget>(F);
-    unsigned FDir = STI.getDarwinDirective();
+    unsigned FDir = STI.getCPUDirective();
-    Directive = Directive > FDir ? FDir : STI.getDarwinDirective();
+    Directive = Directive > FDir ? FDir : STI.getCPUDirective();
     if (STI.hasMFOCRF() && Directive < PPC::DIR_970)
       Directive = PPC::DIR_970;
     if (STI.hasAltivec() && Directive < PPC::DIR_7400)

llvm/lib/Target/PowerPC/PPCHazardRecognizers.cpp

@@ -158,7 +158,7 @@ unsigned PPCDispatchGroupSBHazardRecognizer::PreEmitNoops(SUnit *SU) {
   // new group.
   if (isLoadAfterStore(SU) && CurSlots < 6) {
     unsigned Directive =
-        DAG->MF.getSubtarget<PPCSubtarget>().getDarwinDirective();
+        DAG->MF.getSubtarget<PPCSubtarget>().getCPUDirective();
     // If we're using a special group-terminating nop, then we need only one.
     // FIXME: the same for P9 as previous gen until POWER9 scheduling is ready
     if (Directive == PPC::DIR_PWR6 || Directive == PPC::DIR_PWR7 ||
@@ -218,7 +218,7 @@ void PPCDispatchGroupSBHazardRecognizer::Reset() {
 
 void PPCDispatchGroupSBHazardRecognizer::EmitNoop() {
   unsigned Directive =
-      DAG->MF.getSubtarget<PPCSubtarget>().getDarwinDirective();
+      DAG->MF.getSubtarget<PPCSubtarget>().getCPUDirective();
   // If the group has now filled all of its slots, or if we're using a special
   // group-terminating nop, the group is complete.
   // FIXME: the same for P9 as previous gen until POWER9 scheduling is ready

llvm/lib/Target/PowerPC/PPCISelLowering.cpp

@@ -1201,7 +1201,7 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
   if (Subtarget.isDarwin())
     setPrefFunctionAlignment(Align(16));
 
-  switch (Subtarget.getDarwinDirective()) {
+  switch (Subtarget.getCPUDirective()) {
   default: break;
   case PPC::DIR_970:
   case PPC::DIR_A2:
@@ -1230,15 +1230,15 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
 
   // The Freescale cores do better with aggressive inlining of memcpy and
   // friends. GCC uses same threshold of 128 bytes (= 32 word stores).
-  if (Subtarget.getDarwinDirective() == PPC::DIR_E500mc ||
+  if (Subtarget.getCPUDirective() == PPC::DIR_E500mc ||
-      Subtarget.getDarwinDirective() == PPC::DIR_E5500) {
+      Subtarget.getCPUDirective() == PPC::DIR_E5500) {
     MaxStoresPerMemset = 32;
     MaxStoresPerMemsetOptSize = 16;
     MaxStoresPerMemcpy = 32;
     MaxStoresPerMemcpyOptSize = 8;
     MaxStoresPerMemmove = 32;
     MaxStoresPerMemmoveOptSize = 8;
-  } else if (Subtarget.getDarwinDirective() == PPC::DIR_A2) {
+  } else if (Subtarget.getCPUDirective() == PPC::DIR_A2) {
     // The A2 also benefits from (very) aggressive inlining of memcpy and
     // friends. The overhead of a the function call, even when warm, can be
     // over one hundred cycles.
@@ -11717,7 +11717,7 @@ unsigned PPCTargetLowering::combineRepeatedFPDivisors() const {
   // Combine multiple FDIVs with the same divisor into multiple FMULs by the
   // reciprocal if there are two or more FDIVs (for embedded cores with only
   // one FP pipeline) for three or more FDIVs (for generic OOO cores).
-  switch (Subtarget.getDarwinDirective()) {
+  switch (Subtarget.getCPUDirective()) {
   default:
     return 3;
   case PPC::DIR_440:
@@ -14190,7 +14190,7 @@ void PPCTargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
 }
 
 Align PPCTargetLowering::getPrefLoopAlignment(MachineLoop *ML) const {
-  switch (Subtarget.getDarwinDirective()) {
+  switch (Subtarget.getCPUDirective()) {
   default: break;
   case PPC::DIR_970:
   case PPC::DIR_PWR4:
@@ -15369,7 +15369,7 @@ SDValue PPCTargetLowering::combineMUL(SDNode *N, DAGCombinerInfo &DCI) const {
     return SDValue();
 
   auto IsProfitable = [this](bool IsNeg, bool IsAddOne, EVT VT) -> bool {
-    switch (this->Subtarget.getDarwinDirective()) {
+    switch (this->Subtarget.getCPUDirective()) {
     default:
       // TODO: enhance the condition for subtarget before pwr8
       return false;

llvm/lib/Target/PowerPC/PPCInstrInfo.cpp

@@ -108,7 +108,7 @@ ScheduleHazardRecognizer *
 PPCInstrInfo::CreateTargetHazardRecognizer(const TargetSubtargetInfo *STI,
                                            const ScheduleDAG *DAG) const {
   unsigned Directive =
-      static_cast<const PPCSubtarget *>(STI)->getDarwinDirective();
+      static_cast<const PPCSubtarget *>(STI)->getCPUDirective();
   if (Directive == PPC::DIR_440 || Directive == PPC::DIR_A2 ||
       Directive == PPC::DIR_E500mc || Directive == PPC::DIR_E5500) {
     const InstrItineraryData *II =
@@ -125,7 +125,7 @@ ScheduleHazardRecognizer *
 PPCInstrInfo::CreateTargetPostRAHazardRecognizer(const InstrItineraryData *II,
                                                  const ScheduleDAG *DAG) const {
   unsigned Directive =
-      DAG->MF.getSubtarget<PPCSubtarget>().getDarwinDirective();
+      DAG->MF.getSubtarget<PPCSubtarget>().getCPUDirective();
 
   // FIXME: Leaving this as-is until we have POWER9 scheduling info
   if (Directive == PPC::DIR_PWR7 || Directive == PPC::DIR_PWR8)
@@ -202,7 +202,7 @@ int PPCInstrInfo::getOperandLatency(const InstrItineraryData *ItinData,
 
     // On some cores, there is an additional delay between writing to a condition
     // register, and using it from a branch.
-    unsigned Directive = Subtarget.getDarwinDirective();
+    unsigned Directive = Subtarget.getCPUDirective();
     switch (Directive) {
     default: break;
     case PPC::DIR_7400:
@@ -469,7 +469,7 @@ void PPCInstrInfo::insertNoop(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator MI) const {
   // This function is used for scheduling, and the nop wanted here is the type
   // that terminates dispatch groups on the POWER cores.
-  unsigned Directive = Subtarget.getDarwinDirective();
+  unsigned Directive = Subtarget.getCPUDirective();
   unsigned Opcode;
   switch (Directive) {
   default:            Opcode = PPC::NOP; break;

llvm/lib/Target/PowerPC/PPCSubtarget.cpp

@@ -61,7 +61,7 @@ PPCSubtarget::PPCSubtarget(const Triple &TT, const std::string &CPU,
 
 void PPCSubtarget::initializeEnvironment() {
   StackAlignment = Align(16);
-  DarwinDirective = PPC::DIR_NONE;
+  CPUDirective = PPC::DIR_NONE;
   HasMFOCRF = false;
   Has64BitSupport = false;
   Use64BitRegs = false;
@@ -190,7 +190,7 @@ bool PPCSubtarget::hasLazyResolverStub(const GlobalValue *GV) const {
 bool PPCSubtarget::enableMachineScheduler() const { return true; }
 
 bool PPCSubtarget::enableMachinePipeliner() const {
-  return (DarwinDirective == PPC::DIR_PWR9) && EnableMachinePipeliner;
+  return (CPUDirective == PPC::DIR_PWR9) && EnableMachinePipeliner;
 }
 
 bool PPCSubtarget::useDFAforSMS() const { return false; }

llvm/lib/Target/PowerPC/PPCSubtarget.h

@@ -84,7 +84,7 @@ protected:
   InstrItineraryData InstrItins;
 
   /// Which cpu directive was used.
-  unsigned DarwinDirective;
+  unsigned CPUDirective;
 
   /// Used by the ISel to turn in optimizations for POWER4-derived architectures
   bool HasMFOCRF;
@@ -169,8 +169,11 @@ public:
   Align getStackAlignment() const { return StackAlignment; }
 
   /// getDarwinDirective - Returns the -m directive specified for the cpu.
+  unsigned getDarwinDirective() const { return CPUDirective; }
+
+  /// getCPUDirective - Returns the -m directive specified for the cpu.
   ///
-  unsigned getDarwinDirective() const { return DarwinDirective; }
+  unsigned getCPUDirective() const { return CPUDirective; }
 
   /// getInstrItins - Return the instruction itineraries based on subtarget
   /// selection.

llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp

@@ -554,7 +554,7 @@ bool PPCTTIImpl::isHardwareLoopProfitable(Loop *L, ScalarEvolution &SE,
 
 void PPCTTIImpl::getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
                                          TTI::UnrollingPreferences &UP) {
-  if (ST->getDarwinDirective() == PPC::DIR_A2) {
+  if (ST->getCPUDirective() == PPC::DIR_A2) {
     // The A2 is in-order with a deep pipeline, and concatenation unrolling
     // helps expose latency-hiding opportunities to the instruction scheduler.
     UP.Partial = UP.Runtime = true;
@@ -580,7 +580,7 @@ bool PPCTTIImpl::enableAggressiveInterleaving(bool LoopHasReductions) {
   // on combining the loads generated for consecutive accesses, and failure to
   // do so is particularly expensive. This makes it much more likely (compared
   // to only using concatenation unrolling).
-  if (ST->getDarwinDirective() == PPC::DIR_A2)
+  if (ST->getCPUDirective() == PPC::DIR_A2)
     return true;
 
   return LoopHasReductions;
@@ -650,7 +650,7 @@ unsigned PPCTTIImpl::getCacheLineSize() const {
     return CacheLineSize;
 
   // On P7, P8 or P9 we have a cache line size of 128.
-  unsigned Directive = ST->getDarwinDirective();
+  unsigned Directive = ST->getCPUDirective();
   if (Directive == PPC::DIR_PWR7 || Directive == PPC::DIR_PWR8 ||
       Directive == PPC::DIR_PWR9)
     return 128;
@@ -666,7 +666,7 @@ unsigned PPCTTIImpl::getPrefetchDistance() const {
 }
 
 unsigned PPCTTIImpl::getMaxInterleaveFactor(unsigned VF) {
-  unsigned Directive = ST->getDarwinDirective();
+  unsigned Directive = ST->getCPUDirective();
   // The 440 has no SIMD support, but floating-point instructions
   // have a 5-cycle latency, so unroll by 5x for latency hiding.
   if (Directive == PPC::DIR_440)