Rollup of 11 pull requests#62923

Closed

Centril wants to merge 36 commits intorust-lang:masterfrom

Centril:rollup-53i3am3

Commits on Jun 30, 2019

Take substs into account in `conservative_is_privately_uninhabited`
varkor
committed

Commits on Jul 18, 2019

Add riscv32i-unknown-none-elf target
Disasm
committed

Commits on Jul 20, 2019

warn that raw pointers must be aligned when used, and that writes cause drop
RalfJung
committed
references must be aligned; also move up the warning that fn ptrs must be non-NULL
RalfJung
committed

Commits on Jul 21, 2019

Commits on Jul 22, 2019

Commits on Jul 23, 2019

Commits on Jul 24, 2019