[strong] Disallow implicit conversions for binary arithmetic operations

src/x87/full-codegen-x87.cc

Index: src/x87/full-codegen-x87.cc
diff --git a/src/x87/full-codegen-x87.cc b/src/x87/full-codegen-x87.cc
index 709e567a5b6dc378d4165fc4890f0af1a0e69c18..0da90f5bff9ec97210e50b5d22191357af116140 100644
--- a/src/x87/full-codegen-x87.cc
+++ b/src/x87/full-codegen-x87.cc
@@ -2374,7 +2374,8 @@ void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
 
   __ bind(&stub_call);
   __ mov(eax, ecx);
-  Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();
+  Handle<Code> code = CodeFactory::BinaryOpIC(
+      isolate(), op, language_mode()).code();
   CallIC(code, expr->BinaryOperationFeedbackId());
   patch_site.EmitPatchInfo();
   __ jmp(&done, Label::kNear);
@@ -2518,7 +2519,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
 void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) {
   __ pop(edx);
-  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.
   CallIC(code, expr->BinaryOperationFeedbackId());
   patch_site.EmitPatchInfo();
@@ -4911,7 +4913,8 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   __ mov(edx, eax);
   __ mov(eax, Immediate(Smi::FromInt(1)));
   Handle<Code> code =
-      CodeFactory::BinaryOpIC(isolate(), expr->binary_op()).code();
+      CodeFactory::BinaryOpIC(
+          isolate(), expr->binary_op(), language_mode()).code();
   CallIC(code, expr->CountBinOpFeedbackId());
   patch_site.EmitPatchInfo();
   __ bind(&done);