remove helper functions for assert and unittest

[WalterBright]

This:

1. removes the always-generated assert and unittest helper functions
2. replaces them with direct calls
3. replaces file argument with moduleinfo pointer

This makes using assert and unittest more pay-as-you-go, which can result in more code generated (though not more code executed). Of course, the extra code doesn't matter for unittest asserts.

Undone is the array bounds check, which I'll do if this goes through.

[WalterBright]

This isn't ready yet.

[MartinNowak]

2. replaces them with direct calls

Direct calls to _d_unittest* and _d_assert* you mean.

3. replaces file argument with moduleinfo pointer

Why? We have several known issues/drawbacks w/ dragged in ModuleInfos. Are you trying to avoid redundant strings? I think linkers already deduplicate strings.
If you don't trust those, moving the module name to it's own symbol might be an alternative.

[WalterBright]

I changed the ModuleInfo pointer to a simple char* for the filename. This eliminates dependency on ModuleInfo, and eliminates problems with accessing the internal functions in shared libraries.

But it is blocked by dlang/druntime#1761

[andralex]

This is a welcome simplification.

[WalterBright]

@andralex ready to go!

[MartinNowak]

What about array bounds checks?

[UplinkCoder]

This causes my test-setup to fail :(