This introduces a Shake-based build system, building on Neil Mitchell's
prototype from several years ago [1].

This build system has a number of features relative to the existing
make-based build system:

 * results are produced in a common CSV structure, making it easy to use
   the included analysis tool nofib-compare, to compare results from tests
   outside of nofib.
 * Cachegrind runs can be run in parallel, greatly speeding up such
   measurements
 * native support for (micro-)architectural performance counters on
   Linux via `perf stat`

[1] https://gist.github.com/ndmitchell/4733855

There are also a few more changes to tests to make this build system
work well with nofib.

In particular:

* The Main module for some benchmarks has been renamed.
* The boot phase of benchmarks is now done by a boot.sh script.
* Replace some uses of perl with ghci.
* Some benchmarks that we didn't use to run by default had
  missing/wrong(!) stdout files. I added/updated these.

Take note that shake will run *more* benchmarks by default than make
used to. So you might want to select a subset of benchmarks to run when
using it.

Instead of passing package dependencies via `SRC_HC_OPTS=-package ...`
we rather pass them via `SRC_DEPS`, allowing the build system to
know about the dependency.

Andreas Klebinger authored 6 years ago and Ben Gamari committed 6 years ago

We set -O2 in NoFibHcOpts which is then applied to all benchmarks run.

Adding -O2 in individual benchmarks is therefore redundant.
It also leads to issues when testing performance flags via
EXTRA_HC_OPTS.
Individual Makefiles attach -O2 last. This means all
flags set by -O2 could not be disabled with -fno-<flag> as they
were reenabled by the later -O2 switch.

Test Plan: Using

Reviewers: bgamari, jmct, O26 nofib

Differential Revision: https://phabricator.haskell.org/D4829

Matthew Pickering authored 6 years ago and Ben Gamari committed 6 years ago

Reviewers: michalt, bgamari, O26 nofib, goldfire

Reviewed By: michalt, O26 nofib

Differential Revision: https://phabricator.haskell.org/D4045

Douglas Wilson authored 6 years ago and Ben Gamari committed 6 years ago

Reviewers: O26 nofib, michalt

Reviewed By: O26 nofib, michalt

Subscribers: michalt

Differential Revision: https://phabricator.haskell.org/D4391

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>

This reverts commit 0449cb06.

Conflicts:

	.gitignore