[LLVMdev] NEON intrinsics

[Bob Wilson]

On Sep 21, 2010, at 11:59 AM, Renato Golin wrote:

> On 21 September 2010 19:19, Bob Wilson <bob.wilson at apple.com> wrote:
>> There's no reason to have clang builtins for operations that can be represented directly.  It just bloats the compiler.  Please don't do that.
> 
> Ok, so why are some in there already? There is a validation pass (in a
> pretty generic place, not ARM related: VMCore/AutoUpgrade.cpp) that
> filters them out as plain instructions. Shouldn't them get removed as
> well?

That code is to support reading old bitcode files containing intrinsics that no longer exist or that have different arguments/usage than in previous versions of llvm.  It's not a validation pass, and it's not relevant to any new IR.  It's only for backward compatibility.