2014-02-18 0:48 GMT+09:00 Dicebot <public@dicebot.lv>:

On Monday, 17 February 2014 at 14:51:20 UTC, Kenji Hara wrote:

If a function is only used for CTFE, compiler can elide its codegen. It's
in the scope of optimization.

It can't know for sure it without some sort of WPO / LTO - and those won't happen any time soon. I propose a simple workaround that can be done right now (it can be optional compiler-specific addition)

In some case it would be possible without WPO/LTO:

- Immediately called lambdas

enum x = (){ return some_sort_ctfe_calculartions; }; // lambda codegen is unnecessary.

- modue private functions

module a;

private string foo() { ... }

enum x = foo();

// Compiler can elide codegen for 'foo', if other declarations

// in module a don't use it for runtime code.

Kenji Hara