Unify SMI case inlining for ToNumberStub.

Use ShouldInlineSmiCase() on arm, mips and x64 similar to the ia32 port.

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/19489003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15787 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/full-codegen-arm.cc

@@ -4436,7 +4436,9 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
 
   // Call ToNumber only if operand is not a smi.
   Label no_conversion;
+  if (ShouldInlineSmiCase(expr->op())) {
     __ JumpIfSmi(r0, &no_conversion);
+  }
   ToNumberStub convert_stub;
   __ CallStub(&convert_stub);
   __ bind(&no_conversion);

src/mips/full-codegen-mips.cc

@@ -4470,7 +4470,9 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
 
   // Call ToNumber only if operand is not a smi.
   Label no_conversion;
+  if (ShouldInlineSmiCase(expr->op())) {
     __ JumpIfSmi(v0, &no_conversion);
+  }
   __ mov(a0, v0);
   ToNumberStub convert_stub;
   __ CallStub(&convert_stub);

src/x64/full-codegen-x64.cc

@@ -4420,7 +4420,9 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
 
   // Call ToNumber only if operand is not a smi.
   Label no_conversion;
+  if (ShouldInlineSmiCase(expr->op())) {
     __ JumpIfSmi(rax, &no_conversion, Label::kNear);
+  }
   ToNumberStub convert_stub;
   __ CallStub(&convert_stub);
   __ bind(&no_conversion);