llvm-core/polly: Add 21.0.0_pre20250517 snapshot

Signed-off-by: Michał Górny <mgorny@gentoo.org>

llvm-core/polly/Manifest

@@ -1,3 +1,4 @@
 DIST llvm-project-20.1.5.src.tar.xz 147239812 BLAKE2B 992ebec16a11f32f234ba8b9f228f27939cdaeaaba474a08da2564ba3075bb10ab92a44be704666bdd77f8294321d43da40bb9245c411a86cd53cff88223a91f SHA512 3b7e657714fa9b943c75ec9eeb903018ab4713b1c3370746ba68893220729f178dabb971515741519f24e7ad0fa1dbce1345572bcf1d1fc1e5de97e4d2900a6b
 DIST llvm-project-20.1.5.src.tar.xz.sig 566 BLAKE2B c8be202b475726817893e1fe5fe2d3ab02ea1d3130ccfdf4c2c29b46e6aef79091de78e8a9aef59416ac1120bb3af6fdf47464db9b27b8fb4cb4194b0444e571 SHA512 c1bd30af5f7bfa6cac73994e9068d2791d9d27e86375fb15ad426422ad00cb43ade226c1b91ecc7daa950efae62c86300e4290d59649310f4e8fab5bdcb264fe
+DIST llvm-project-aaaae99663dbb220c6c27fa9cacf93fcb8f20e7c.tar.gz 235477577 BLAKE2B 46a3b7863cdfde75045dfcab95f8c9eee21f8ce80cee700284bc174adbb4038f23bba3b15635c88c2723ed0d20e6fddcf43c92b9e540c885af48e81bfa8c82aa SHA512 bf8e7f28622f91da57698220fca592105d109c38801b5e0312f5e290bca1ae32ef393179cfe912c194dbf85ece9bd6ee63b587157b0fcd6007bbaff3324e77ed
 DIST llvm-project-fcb4bda9dcfcdb64d8b069e8416c75d7a1a62e52.tar.gz 233149231 BLAKE2B 95a7a012a1e747afcf83ace3785c8ef6a3e10f6075e59eb1c5b077cc9edae244b648f341bc0ac6a45b2afc8f7ffe130a90a741a04465523f30f8322566386703 SHA512 b46f0c90a1c56750cada24183ca382b267a2d2faa0db7d77a8bdd4e94e6303e57d565cf85447b3c0e0efdd3750efef1e10e8ce6f1fe8f1ae10ee31d25ddf3fb7

llvm-core/polly/polly-21.0.0_pre20250517.ebuild

@@ -0,0 +1,59 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+
+inherit cmake llvm.org python-any-r1
+
+DESCRIPTION="Polyhedral optimizations for LLVM"
+HOMEPAGE="https://polly.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+# vendored isl (fork?)
+LICENSE+=" MIT"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="+debug test"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	~llvm-core/llvm-${PV}:${LLVM_MAJOR}=[debug=]
+"
+RDEPEND="
+	${DEPEND}
+"
+BDEPEND="
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)
+"
+
+LLVM_COMPONENTS=( polly cmake )
+llvm.org_set_globals
+
+python_check_deps() {
+	python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"
+	)
+	use test && mycmakeargs+=(
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+	cmake_src_configure
+}
+
+src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-polly
+}