[WASM] Simplify SIMD shuffle opcodes.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 099802cf89a65c59514fed7d6533ab62cafdf60c..1335b6e7f03db6bc765c029220c03f34ec490f90 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -1711,10 +1711,6 @@ void InstructionSelector::VisitNode(Node* node) {
       return MarkAsSimd128(node), VisitS128Not(node);
     case IrOpcode::kS128Select:
       return MarkAsSimd128(node), VisitS128Select(node);
-    case IrOpcode::kS32x4Shuffle:
-      return MarkAsSimd128(node), VisitS32x4Shuffle(node);
-    case IrOpcode::kS16x8Shuffle:
-      return MarkAsSimd128(node), VisitS16x8Shuffle(node);
     case IrOpcode::kS8x16Shuffle:
       return MarkAsSimd128(node), VisitS8x16Shuffle(node);
     case IrOpcode::kS1x4AnyTrue:
@@ -2378,23 +2374,12 @@ void InstructionSelector::VisitS128Not(Node* node) { UNIMPLEMENTED(); }
 #if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_MIPS && \
     !V8_TARGET_ARCH_MIPS64
 void InstructionSelector::VisitS128Zero(Node* node) { UNIMPLEMENTED(); }
-#endif  // !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_MIPS &&
-        // !V8_TARGET_ARCH_MIPS64
 
-#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_MIPS && \
-    !V8_TARGET_ARCH_MIPS64
 void InstructionSelector::VisitS128Select(Node* node) { UNIMPLEMENTED(); }
 #endif  // !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_MIPS &&
         // !V8_TARGET_ARCH_MIPS64
 
 #if !V8_TARGET_ARCH_ARM
-void InstructionSelector::VisitS32x4Shuffle(Node* node) { UNIMPLEMENTED(); }
-
-void InstructionSelector::VisitS16x8Shuffle(Node* node) { UNIMPLEMENTED(); }
-
-#endif  // !V8_TARGET_ARCH_ARM
-
-#if !V8_TARGET_ARCH_ARM
 void InstructionSelector::VisitS8x16Shuffle(Node* node) { UNIMPLEMENTED(); }
 #endif  // !V8_TARGET_ARCH_ARM