Andrew Martin authored Mar 19, 2018 and Ben Gamari committed Mar 19, 2018

Provide flag for showing showing Word# and Word64# as hexadecimal when
dumping GHC core.  The only affects Word, not Int, and it prefixes the
hexadecimal with enough zeroes to make the total character count a power
of two. For example:

- 0x0C0C instead of 0xC0C
- 0x00BA00BA instead of 0xBA00BA

This also affects the presentation of Word# and Word64# in GHC's error
messages. It is not expected that the flag will be used for this, but
it is a side-effect worth noting.

Test Plan: none

Reviewers: bgamari, simonpj

Reviewed By: simonpj

Subscribers: simonpj, mpickering, rwbarton, thomie, carter, andrewthad

GHC Trac Issues: #14872

Differential Revision: https://phabricator.haskell.org/D4465