Revert of [wasm]implement simd lowering for simple F32x4 and I32x4 unops

src/compiler/simd-scalar-lowering.cc

Index: src/compiler/simd-scalar-lowering.cc
diff --git a/src/compiler/simd-scalar-lowering.cc b/src/compiler/simd-scalar-lowering.cc
index cfa46c3cafe817c92ee61c462928a8aa67fddbff..87a5e07281f4462d8406edd181bc218dd15e1ff7 100644
--- a/src/compiler/simd-scalar-lowering.cc
+++ b/src/compiler/simd-scalar-lowering.cc
@@ -75,8 +75,6 @@
   V(Int32x4Splat)                 \
   V(Int32x4ExtractLane)           \
   V(Int32x4ReplaceLane)           \
-  V(Int32x4Neg)                   \
-  V(Simd128Not)                   \
   V(Int32x4Add)                   \
   V(Int32x4Sub)                   \
   V(Int32x4Mul)                   \
@@ -88,16 +86,12 @@
   V(Float32x4Splat)                 \
   V(Float32x4ExtractLane)           \
   V(Float32x4ReplaceLane)           \
-  V(Float32x4Abs)                   \
-  V(Float32x4Neg)                   \
   V(Float32x4Add)                   \
   V(Float32x4Sub)                   \
   V(Float32x4Mul)                   \
   V(Float32x4Div)                   \
   V(Float32x4Min)                   \
-  V(Float32x4Max)                   \
-  V(Float32x4FromInt32x4)           \
-  V(Float32x4FromUint32x4)
+  V(Float32x4Max)
 
 void SimdScalarLowering::SetLoweredType(Node* node, Node* output) {
   switch (node->opcode()) {
@@ -114,14 +108,8 @@
         break;
       }
 #undef CASE_STMT
-    default: {
-      if (output->opcode() == IrOpcode::kFloat32x4FromInt32x4 ||
-          output->opcode() == IrOpcode::kFloat32x4FromUint32x4) {
-        replacements_[node->id()].type = SimdType::kInt32;
-      } else {
-        replacements_[node->id()].type = replacements_[output->id()].type;
-      }
-    }
+    default:
+      replacements_[node->id()].type = replacements_[output->id()].type;
   }
 }
 
@@ -241,25 +229,14 @@
   }
 }
 
-void SimdScalarLowering::LowerBinaryOp(Node* node, SimdType input_rep_type,
+void SimdScalarLowering::LowerBinaryOp(Node* node, SimdType rep_type,
                                        const Operator* op) {
   DCHECK(node->InputCount() == 2);
-  Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
-  Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
+  Node** rep_left = GetReplacementsWithType(node->InputAt(0), rep_type);
+  Node** rep_right = GetReplacementsWithType(node->InputAt(1), rep_type);
   Node* rep_node[kMaxLanes];
   for (int i = 0; i < kMaxLanes; ++i) {
     rep_node[i] = graph()->NewNode(op, rep_left[i], rep_right[i]);
-  }
-  ReplaceNode(node, rep_node);
-}
-
-void SimdScalarLowering::LowerUnaryOp(Node* node, SimdType input_rep_type,
-                                      const Operator* op) {
-  DCHECK(node->InputCount() == 1);
-  Node** rep = GetReplacementsWithType(node->InputAt(0), input_rep_type);
-  Node* rep_node[kMaxLanes];
-  for (int i = 0; i < kMaxLanes; ++i) {
-    rep_node[i] = graph()->NewNode(op, rep[i]);
   }
   ReplaceNode(node, rep_node);
 }
@@ -422,28 +399,6 @@
       I32X4_BINOP_CASE(kSimd128Or, Word32Or)
       I32X4_BINOP_CASE(kSimd128Xor, Word32Xor)
 #undef I32X4_BINOP_CASE
-    case IrOpcode::kInt32x4Neg: {
-      DCHECK(node->InputCount() == 1);
-      Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
-      Node* rep_node[kMaxLanes];
-      Node* zero = graph()->NewNode(common()->Int32Constant(0));
-      for (int i = 0; i < kMaxLanes; ++i) {
-        rep_node[i] = graph()->NewNode(machine()->Int32Sub(), zero, rep[i]);
-      }
-      ReplaceNode(node, rep_node);
-      break;
-    }
-    case IrOpcode::kSimd128Not: {
-      DCHECK(node->InputCount() == 1);
-      Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
-      Node* rep_node[kMaxLanes];
-      Node* mask = graph()->NewNode(common()->Int32Constant(0xffffffff));
-      for (int i = 0; i < kMaxLanes; ++i) {
-        rep_node[i] = graph()->NewNode(machine()->Word32Xor(), rep[i], mask);
-      }
-      ReplaceNode(node, rep_node);
-      break;
-    }
 #define F32X4_BINOP_CASE(name)                                 \
   case IrOpcode::kFloat32x4##name: {                           \
     LowerBinaryOp(node, rep_type, machine()->Float32##name()); \
@@ -456,23 +411,6 @@
       F32X4_BINOP_CASE(Min)
       F32X4_BINOP_CASE(Max)
 #undef F32X4_BINOP_CASE
-#define F32X4_UNOP_CASE(name)                                 \
-  case IrOpcode::kFloat32x4##name: {                          \
-    LowerUnaryOp(node, rep_type, machine()->Float32##name()); \
-    break;                                                    \
-  }
-      F32X4_UNOP_CASE(Abs)
-      F32X4_UNOP_CASE(Neg)
-      F32X4_UNOP_CASE(Sqrt)
-#undef F32x4_UNOP_CASE
-    case IrOpcode::kFloat32x4FromInt32x4: {
-      LowerUnaryOp(node, SimdType::kInt32, machine()->RoundInt32ToFloat32());
-      break;
-    }
-    case IrOpcode::kFloat32x4FromUint32x4: {
-      LowerUnaryOp(node, SimdType::kInt32, machine()->RoundUint32ToFloat32());
-      break;
-    }
     case IrOpcode::kInt32x4Splat:
     case IrOpcode::kFloat32x4Splat: {
       Node* rep_node[kMaxLanes];