[wasm] Use MachineOperator::Float64Log to implement kExprF64Log.

src/compiler/wasm-compiler.cc

Index: src/compiler/wasm-compiler.cc
diff --git a/src/compiler/wasm-compiler.cc b/src/compiler/wasm-compiler.cc
index 7270ddd24848854d9e42a020404ed04bdcca7ed4..1d547113d270d6536bf719d10750dd6e8467b4f5 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -796,9 +796,9 @@ Node* WasmGraphBuilder::Unop(wasm::WasmOpcode opcode, Node* input,
     case wasm::kExprF64Exp: {
       return BuildF64Exp(input);
     }
-    case wasm::kExprF64Log: {
-      return BuildF64Log(input);
-    }
+    case wasm::kExprF64Log:
+      op = m->Float64Log();
+      break;
     case wasm::kExprI32ConvertI64:
       op = m->TruncateInt64ToInt32();
       break;
@@ -1383,13 +1383,6 @@ Node* WasmGraphBuilder::BuildF64Exp(Node* input) {
   return BuildCFuncInstruction(ref, type, input);
 }
 
-Node* WasmGraphBuilder::BuildF64Log(Node* input) {
-  MachineType type = MachineType::Float64();
-  ExternalReference ref =
-      ExternalReference::f64_log_wrapper_function(jsgraph()->isolate());
-  return BuildCFuncInstruction(ref, type, input);
-}
-
 Node* WasmGraphBuilder::BuildF64Atan2(Node* left, Node* right) {
   MachineType type = MachineType::Float64();
   ExternalReference ref =