[llvm] r262455 - Bug 20810: Use report_fatal_error instead of unreachable

[Matt Arsenault via llvm-commits]

> On Mar 3, 2016, at 15:12, Rafael Espíndola via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> This is not how we split llvm_unreachable/report_fatal_error in llvm
> and I don't think r600 should be an exception.
> 
> If this code is known to be buggy, add a note for potential users
> saying that they should build with assertions and report bugs.
> 
> It is still the case that report_fatal_error is for valid errors.
> llvm_unreachable is for detecting *bugs* in the code.
> 
> Cheers,
> Rafael

I’m just trying to address the issue in the bug report where this can cause infinite looping since it isn’t guaranteed to terminate the program.

-Matt