[strong] Disallow implicit conversions for binary arithmetic operations

src/arm64/full-codegen-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 2134 matching lines @@
   Register result = x0;
   __ Pop(left);
 
   // Perform combined smi check on both operands.
   __ Orr(x10, left, right);
   JumpPatchSite patch_site(masm_);
   patch_site.EmitJumpIfSmi(x10, &both_smis);
 
   __ Bind(&stub_call);
 
-  Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();
+  Handle<Code> code = CodeFactory::BinaryOpIC(
+      isolate(), op, language_mode()).code();
   {
     Assembler::BlockPoolsScope scope(masm_);
     CallIC(code, expr->BinaryOperationFeedbackId());
     patch_site.EmitPatchInfo();
   }
   __ B(&done);
 
   __ Bind(&both_smis);
   // Smi case. This code works in the same way as the smi-smi case in the type
   // recording binary operation stub, see
@@ skipping 61 matching lines @@
       UNREACHABLE();
   }
 
   __ Bind(&done);
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) {
   __ Pop(x1);
-  Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();
+  Handle<Code> code = CodeFactory::BinaryOpIC(
+      isolate(), op, language_mode()).code();
   JumpPatchSite patch_site(masm_);    // Unbound, signals no inlined smi code.
   {
     Assembler::BlockPoolsScope scope(masm_);
     CallIC(code, expr->BinaryOperationFeedbackId());
     patch_site.EmitPatchInfo();
   }
   context()->Plug(x0);
 }
 
 
@@ skipping 2428 matching lines @@
 
   __ Bind(&stub_call);
   __ Mov(x1, x0);
   __ Mov(x0, Smi::FromInt(count_value));
 
   // Record position before stub call.
   SetSourcePosition(expr->position());
 
   {
     Assembler::BlockPoolsScope scope(masm_);
-    Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), Token::ADD).code();
+    Handle<Code> code = CodeFactory::BinaryOpIC(
+        isolate(), Token::ADD, language_mode()).code();
     CallIC(code, expr->CountBinOpFeedbackId());
     patch_site.EmitPatchInfo();
   }
   __ Bind(&done);
 
   // Store the value returned in x0.
   switch (assign_type) {
     case VARIABLE:
       if (expr->is_postfix()) {
         { EffectContext context(this);
@@ skipping 811 matching lines @@
     }
   }
 
   return INTERRUPT;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64