…30483)

(cherry picked from commit 3e6f607)

(cherry picked from commit a5a5882)

This corresponds to macOS 10.12 Sierra. XCode 8 covers El Capitan and
Sierra, so if Travis is giving us XCode 8.x for x < 3, we're on El Cap.
Homebrew supports only three versions of macOS at a time, which means
that El Cap (10.11) is no longer support. This is likely why our Mac
builds are trying to build GCC from source; a bottle might not be
available.

(cherry picked from commit 862fe08)

PR #28478 moved the computation of the use counts before the finish call.
to fix #28444. However, the early parts of the finish call fixes up phi
node arguments, which fail to get counted if we look at use counts before
that fixup is performed. This causes #30594 where the only non-trivial use
is on the backedge of the phi and would thus incorrectly fail to get accounted
for. Fix that by taking the use count after phi fixup but before dce.

(cherry picked from commit f8f2045)

These changes cut some method dependency edges that tend to lead to
invalidations when loading packages.

(cherry picked from commit 13fc4c3)

SROA was accidentally treating a pending node as old and thus
getting the wrong type when querying the predecessor. As a result
it thought one of the paths was unreachable causing undefined data
to be introduced on that path (generally the `1.0` that happened to
already be in register).

Fix #29983

(cherry picked from commit da0179c)

I don't have concrete tests for these, but it looks like
they all need the `is_old` predicate for what they're doing,
so switch those over also while we're at it.

(cherry picked from commit 34f7a4a)

Improves #29867 by avoiding an invoke.

(cherry picked from commit f2d2d6f)

(cherry picked from commit 2a2ba37)

* Auto-detect binarybuilder triplet

* Add OpenBLAS BinaryBuilder installation scaffolding

Also make it easier to add more BB-cached versions of dependencies in the future

* Enable `fixup-libgfortran.sh` to directly ask `$FC` for paths

* Tell Appveyor and Travis to use BinaryBuilder OpenBLAS

Also allow the build system to auto-guess the triplet

(cherry picked from commit 87c18d8)

* Fix `bb-install` naming conventions, add hashes

* Set `DEP_LIBS` to include `openblas` on Appveyor

* When guessing BB libc, default to `glibc` on Linux

* Fix bb-install bash parsing failure

Quote to avoid bash freaking out from spurious `)` from compilers that
have fancy version strings such as `(Red Hat 7.3.1-5)`, which gets
`lastword`'ed down to `7.3.1-5)`.

* Add `contrib/refresh_bb_tarballs.sh` to aid in batch-grabbing BB hashes

(cherry picked from commit 8b189ec)