ci: merge Linux tests into one job using a matrix #110

	# Test whether we can link to LLVM installed from apt.llvm.org or Homebrew.
	---

	name: Test

	on: [push, pull_request]

	jobs:
	test-macos-llvm-14:
	runs-on: macos-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install LLVM
	run: \|
	brew update
	brew install llvm@14
	- name: Test LLVM 14
	run:
	go test -v -tags=llvm14
	test-macos-llvm-15:
	runs-on: macos-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install LLVM
	run: \|
	brew update
	brew install llvm@15
	- name: Test LLVM 15
	run:
	go test -v -tags=llvm15
	test-macos-llvm-16:
	runs-on: macos-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install LLVM
	run: \|
	brew update
	brew install llvm@16
	- name: Test LLVM 16
	run:
	go test -v -tags=llvm16
	- name: Test default LLVM
	run:
	go test -v
	test-macos-llvm-17:
	runs-on: macos-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install LLVM
	run: \|
	brew update
	brew install llvm@17
	- name: Test LLVM 17
	run:
	go test -v -tags=llvm17
	test-linux:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	llvm: [14, 15, 16, 17]
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install LLVM
	run: \|
	echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${{ matrix.llvm }} main' \| sudo tee /etc/apt/sources.list.d/llvm.list
	wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key \| sudo apt-key add -
	sudo apt-get update
	sudo apt-get install --no-install-recommends llvm-${{ matrix.llvm }}-dev
	- name: Test LLVM ${{ matrix.llvm }}
	run:
	go test -v -tags=llvm${{ matrix.llvm }}
	- name: Test default LLVM
	if: matrix.llvm == 16
	run:
	go test -v

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