…st debug-only

…gument.

…r=wesleywiser

Allow to specify profiling data output directory as -Zself-profile argument.

The PR also makes `rustc` include the crate-name (if already available) in the output file name.

r? @wesleywiser

At some point we should add some basic tests for `-Zself-profile`.

split core::ptr module into multiple files

Cc @Centril

rename Scalar::Bits to Scalar::Raw and bits field to data

Also use this opportunity to seal some abstraction leaks (other modules constructing `Scalar::Bits` directly instead of using a constructor).

r? @oli-obk

…oli-obk

Rename Place::local to Place::local_or_deref_local

r? @oli-obk