add simd.math (#70) #9

	name: SIMD PR Workflow

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.ref }}
	cancel-in-progress: true

	on:
	push:
	branches:
	- simd_for_upstream
	paths:
	- 'libcxx/test/std/experimental/simd/*'
	- 'libcxx/include/experimental/__simd/*'
	- 'libcxx/include/experimental/simd'
	pull_request:
	branches:
	- simd_for_upstream
	paths:
	- 'libcxx/test/std/experimental/simd/*'
	- 'libcxx/include/experimental/__simd/*'
	- 'libcxx/include/experimental/simd'

	jobs:
	build_and_test:
	runs-on: ubuntu-22.04
	steps:
	- name: Checkout repository
	uses: actions/checkout@v2

	- name: Install dependencies
	run: \|
	sudo apt update
	sudo apt install ninja-build cmake python3 g++

	- name: Configure and build LLVM
	run: \|
	mkdir build
	cmake -G Ninja -S llvm -B build -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind" -DLLVM_RUNTIME_TARGETS="x86_64-unknown-linux-gnu"
	ninja -C build runtimes

	- name: Build test dependencies
	run: \|
	ninja -C build runtimes-test-depends

	- name: Run SIMD tests and check results
	run: \|
	output=$(build/bin/llvm-lit --param=std=c++17 -sv --show-unsupported --xunit-xml-output test-results.xml --time-tests build/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/libcxx/test/std/experimental/simd/)
	echo "$output"
	failures=$(cat test-results.xml \| grep -oP 'failures="\K\d+')
	if [ "$failures" -ne 0 ]; then
	echo "There were $failures test failures"
	exit 1
	fi

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