diff --git a/llvm-core/polly/Manifest b/llvm-core/polly/Manifest
index 2b1c896963fd6..a5509e4e487e8 100644
--- a/llvm-core/polly/Manifest
+++ b/llvm-core/polly/Manifest
@@ -4,4 +4,5 @@ DIST llvm-project-21.1.8.src.tar.xz 158958576 BLAKE2B 0d3d4ee920f8e5db50e9815261
 DIST llvm-project-21.1.8.src.tar.xz.sig 119 BLAKE2B cffc1825f5778a3e3c128ec3e856ff6ee50687319d621cdf42e895abf67e05cc51cb7493308e2b506ab60dbdbaca7aa75eb9f78d91d42c81f9682a36f4042e9d SHA512 10f58eff58ed6e701d0f123b15e68c82ab8cbdf99b1c86c0d83e3b8553e90ea51055e30327e8e442ded57c8f503e2a2de9ee075e9c28b5ba815a0f8922f8671c
 DIST llvm-project-22.1.8.src.tar.xz 167061596 BLAKE2B 092204f62e0f0364a041c737eb2c25fd073cb5689663d6ccd5a9e4e1743d6d80822360d59b64bff7b4d7872a68a79e899bf2f75f384e55c7d313a79243576f03 SHA512 2615b20ba08534f83ab8ecc7b5ba43b5f1dfcf9cdb2534a32fcdbf0ccdd9a008b46276e45ef26ed9377f65b5e4ae89ea798f3863fd034484b5715140f3a7b35c
 DIST llvm-project-22.1.8.src.tar.xz.sig 119 BLAKE2B 2ce93472036e68782252991e4a8bdbeeec8706a56022220083a38a42ef18714a7894c41aaa04dc0d03f18601d8bfc1a5a030ed0ef0f0d64a662eae9843a4b362 SHA512 99a457b5b1fb409a5fe72b59ebd4ddae5cade3e5f2493e33b44d4f4b4625f7a1743f80106efb1134668842b15ea3400ce2c29263bec8ff986e05040910125e15
+DIST llvm-project-49de424f45389cb757c3cc8c50daf38d024e2314.tar.gz 275619907 BLAKE2B de59729b44763de1fba07280d09059f3cb716aa1a8de51b8d8fd6e385378facdf5357845ed9f372f4e613fb8d098b75933c0eff290a42a4803a24ba2afe01a86 SHA512 8ea319751d4bbae866deb77710487f492c3f73f5fd853dc1a3373239e17916f2cbead3042b64d72731db6dd83c43b9827f2f671034f48491e3ce86e8863ce195
 DIST llvm-project-6d4cd34d861baec5a761d15b81395fbe88f4391b.tar.gz 273781215 BLAKE2B 9ca9896ac0cfcb9449bd0975e16aca725e14ce5a4c3afd859799ef056a0e1341d63fa21b9bfd3ec1bee2a8482c5cecdd59482d373db72f083d399748a2396e15 SHA512 407e7d2ae1df19bf6095a953a1506583de91e203c4d0461b85a87f86d2069f2b23114b65c5c7f0065d9fbbf8d657bec6ef489ba9310b89f0bddab22c86cccb04
diff --git a/llvm-core/polly/polly-23.0.0_pre20260628.ebuild b/llvm-core/polly/polly-23.0.0_pre20260628.ebuild
new file mode 100644
index 0000000000000..81e557ee61776
--- /dev/null
+++ b/llvm-core/polly/polly-23.0.0_pre20260628.ebuild
@@ -0,0 +1,59 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} )
+
+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
+}