PPC: Reland "[turbofan] Instruction scheduler for Turbofan."

src/compiler/ppc/instruction-scheduler-ppc.cc

Index: src/compiler/ppc/instruction-scheduler-ppc.cc
diff --git a/src/compiler/ppc/instruction-scheduler-ppc.cc b/src/compiler/ppc/instruction-scheduler-ppc.cc
index af86a87ad78690241c2a6d4d0023f58547cd6456..fc90cdd628ea01464f0769c95245a22f23f9df15 100644
--- a/src/compiler/ppc/instruction-scheduler-ppc.cc
+++ b/src/compiler/ppc/instruction-scheduler-ppc.cc
@@ -8,17 +8,134 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-bool InstructionScheduler::SchedulerSupported() { return false; }
+bool InstructionScheduler::SchedulerSupported() { return true; }
 
 
 int InstructionScheduler::GetTargetInstructionFlags(
     const Instruction* instr) const {
-  UNIMPLEMENTED();
+  switch (instr->arch_opcode()) {
+    case kPPC_And:
+    case kPPC_AndComplement:
+    case kPPC_Or:
+    case kPPC_OrComplement:
+    case kPPC_Xor:
+    case kPPC_ShiftLeft32:
+    case kPPC_ShiftLeft64:
+    case kPPC_ShiftRight32:
+    case kPPC_ShiftRight64:
+    case kPPC_ShiftRightAlg32:
+    case kPPC_ShiftRightAlg64:
+    case kPPC_RotRight32:
+    case kPPC_RotRight64:
+    case kPPC_Not:
+    case kPPC_RotLeftAndMask32:
+    case kPPC_RotLeftAndClear64:
+    case kPPC_RotLeftAndClearLeft64:
+    case kPPC_RotLeftAndClearRight64:
+    case kPPC_Add:
+    case kPPC_AddWithOverflow32:
+    case kPPC_AddDouble:
+    case kPPC_Sub:
+    case kPPC_SubWithOverflow32:
+    case kPPC_SubDouble:
+    case kPPC_Mul32:
+    case kPPC_Mul64:
+    case kPPC_MulHigh32:
+    case kPPC_MulHighU32:
+    case kPPC_MulDouble:
+    case kPPC_Div32:
+    case kPPC_Div64:
+    case kPPC_DivU32:
+    case kPPC_DivU64:
+    case kPPC_DivDouble:
+    case kPPC_Mod32:
+    case kPPC_Mod64:
+    case kPPC_ModU32:
+    case kPPC_ModU64:
+    case kPPC_ModDouble:
+    case kPPC_Neg:
+    case kPPC_NegDouble:
+    case kPPC_SqrtDouble:
+    case kPPC_FloorDouble:
+    case kPPC_CeilDouble:
+    case kPPC_TruncateDouble:
+    case kPPC_RoundDouble:
+    case kPPC_MaxDouble:
+    case kPPC_MinDouble:
+    case kPPC_AbsDouble:
+    case kPPC_Cntlz32:
+    case kPPC_Cntlz64:
+    case kPPC_Popcnt32:
+    case kPPC_Popcnt64:
+    case kPPC_Cmp32:
+    case kPPC_Cmp64:
+    case kPPC_CmpDouble:
+    case kPPC_Tst32:
+    case kPPC_Tst64:
+    case kPPC_ExtendSignWord8:
+    case kPPC_ExtendSignWord16:
+    case kPPC_ExtendSignWord32:
+    case kPPC_Uint32ToUint64:
+    case kPPC_Int64ToInt32:
+    case kPPC_Int64ToFloat32:
+    case kPPC_Int64ToDouble:
+    case kPPC_Uint64ToFloat32:
+    case kPPC_Uint64ToDouble:
+    case kPPC_Int32ToDouble:
+    case kPPC_Uint32ToDouble:
+    case kPPC_Float32ToDouble:
+    case kPPC_DoubleToInt32:
+    case kPPC_DoubleToUint32:
+    case kPPC_DoubleToInt64:
+    case kPPC_DoubleToUint64:
+    case kPPC_DoubleToFloat32:
+    case kPPC_DoubleExtractLowWord32:
+    case kPPC_DoubleExtractHighWord32:
+    case kPPC_DoubleInsertLowWord32:
+    case kPPC_DoubleInsertHighWord32:
+    case kPPC_DoubleConstruct:
+    case kPPC_BitcastInt32ToFloat32:
+    case kPPC_BitcastFloat32ToInt32:
+    case kPPC_BitcastInt64ToDouble:
+    case kPPC_BitcastDoubleToInt64:
+      return kNoOpcodeFlags;
+
+    case kPPC_LoadWordS8:
+    case kPPC_LoadWordU8:
+    case kPPC_LoadWordS16:
+    case kPPC_LoadWordU16:
+    case kPPC_LoadWordS32:
+    case kPPC_LoadWord64:
+    case kPPC_LoadFloat32:
+    case kPPC_LoadDouble:
+      return kIsLoadOperation;
+
+    case kPPC_StoreWord8:
+    case kPPC_StoreWord16:
+    case kPPC_StoreWord32:
+    case kPPC_StoreWord64:
+    case kPPC_StoreFloat32:
+    case kPPC_StoreDouble:
+    case kPPC_Push:
+    case kPPC_PushFrame:
+    case kPPC_StoreToStackSlot:
+      return kHasSideEffect;
+
+#define CASE(Name) case k##Name:
+    COMMON_ARCH_OPCODE_LIST(CASE)
+#undef CASE
+      // Already covered in architecture independent code.
+      UNREACHABLE();
+  }
+
+  UNREACHABLE();
+  return kNoOpcodeFlags;
 }
 
 
 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
-  UNIMPLEMENTED();
+  // TODO(all): Add instruction cost modeling.
+  return 1;
 }
 
 }  // namespace compiler