PPC: remove unused opcodes from codegen

Change-Id: I6f0bdcedb55bc673ac7381ac94bca3e17e360e21
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097449
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#76328}

src/compiler/backend/ppc/code-generator-ppc.cc

@@ -2012,15 +2012,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       break;
     }
     case kAtomicLoadInt8:
-    case kPPC_AtomicLoadUint8:
     case kAtomicLoadInt16:
-    case kPPC_AtomicLoadUint16:
-    case kPPC_AtomicLoadWord32:
-    case kPPC_AtomicLoadWord64:
-    case kPPC_AtomicStoreUint8:
-    case kPPC_AtomicStoreUint16:
-    case kPPC_AtomicStoreWord32:
-    case kPPC_AtomicStoreWord64:
       UNREACHABLE();
     case kAtomicExchangeInt8:
       ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(lbarx, stbcx);

src/compiler/backend/ppc/instruction-codes-ppc.h

@@ -141,14 +141,6 @@ namespace compiler {
   V(PPC_CompressSigned)              \
   V(PPC_CompressPointer)             \
   V(PPC_CompressAny)                 \
-  V(PPC_AtomicStoreUint8)            \
-  V(PPC_AtomicStoreUint16)           \
-  V(PPC_AtomicStoreWord32)           \
-  V(PPC_AtomicStoreWord64)           \
-  V(PPC_AtomicLoadUint8)             \
-  V(PPC_AtomicLoadUint16)            \
-  V(PPC_AtomicLoadWord32)            \
-  V(PPC_AtomicLoadWord64)            \
   V(PPC_AtomicExchangeUint8)         \
   V(PPC_AtomicExchangeUint16)        \
   V(PPC_AtomicExchangeWord32)        \

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

@@ -332,10 +332,6 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kPPC_LoadFloat32:
     case kPPC_LoadDouble:
     case kPPC_LoadSimd128:
-    case kPPC_AtomicLoadUint8:
-    case kPPC_AtomicLoadUint16:
-    case kPPC_AtomicLoadWord32:
-    case kPPC_AtomicLoadWord64:
     case kPPC_Peek:
     case kPPC_LoadDecompressTaggedSigned:
     case kPPC_LoadDecompressTaggedPointer:
@@ -378,10 +374,6 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kPPC_S128Store64Lane:
       return kHasSideEffect;
 
-    case kPPC_AtomicStoreUint8:
-    case kPPC_AtomicStoreUint16:
-    case kPPC_AtomicStoreWord32:
-    case kPPC_AtomicStoreWord64:
     case kPPC_AtomicExchangeUint8:
     case kPPC_AtomicExchangeUint16:
     case kPPC_AtomicExchangeWord32: