diff --git a/llvm-core/polly/Manifest b/llvm-core/polly/Manifest
index 378b4dd64cfb2..a46e8891ab1ed 100644
--- a/llvm-core/polly/Manifest
+++ b/llvm-core/polly/Manifest
@@ -6,4 +6,5 @@ DIST llvm-project-22.1.0.src.tar.xz 167040408 BLAKE2B c5e9971dd17f4b0508b85c9f24
 DIST llvm-project-22.1.0.src.tar.xz.sig 119 BLAKE2B d3190d9dbacedf9de0c6b3d5c7711ae3c57dd4dc8cd136bc27fe4901253ffbd6d21060c046d7bf69d3a9489b5704ab5337e6d26da8236966c609b2d0eb54db97 SHA512 6145bf769640a9c6546cb63fa82450b2985ab74b2180a735f709ed909998cfbc6781116354b8b819cefa0e87cd11d470ecc64cd758b4a703aa10ee7880315f42
 DIST llvm-project-22.1.2.src.tar.xz 167026580 BLAKE2B f838277e2bb47c273e8c709940aff5e21b88ad8216a4c6813d783f6041ac4b624c954bedd4c572c117d308ccafedca80ea95fcd73675c00ebfa998057e522f7b SHA512 d5adfbb8e5026b845f8251f5f490b4646ccd2ecaf81a2b80091d1c71044f5c7726f2df6680a95589f2dedc614bdd9cdd88febcce6d5fc92f638f616d503b8066
 DIST llvm-project-22.1.2.src.tar.xz.sig 119 BLAKE2B 4ca084feb2d99ca6d763048244305408400fd9e1fb08a4314112d4d0318e4a2f3337858217c6d09fc136e0dd48f5bed7e88ecd3510116a3777dedec013f915f3 SHA512 dba272f935aa5ff3e93e538ac8877a79fdd3d2bf0efa61266c3caa85ac3aab167213a76759ed9531b539cdfd57c96a9c890807c4a04ba65a4d80b0c3dff044f2
+DIST llvm-project-af6521fb3a36149cd69d83bfdf87ed26e59a14a2.tar.gz 265801058 BLAKE2B 3bbaee50354a8c67f4ebfbcbd0ed5d8658af082602a821d1e6d716d0c2f2952c817d594a1d8f573f0b54176ad18b23742db07d6471c72cca6f1082038ea95419 SHA512 70d3b9f95a3a895450da1d77657108a70d4910f0d78c7310b340bed2a2571b0bf5631dee21e8b4c57ebfc756a9e44cc34c2b6a0ac5354a3d500fcfe198a25849
 DIST llvm-project-df9eb79970c012990e829d174d181d575d414efe.tar.gz 265149781 BLAKE2B ab7a87dad369685fc26a054c065dee6ef2754b6446d5a6e15ed7f5bb52d7d433b519cac0522063ba222600f6f40dc40f7bf27930c74031cc40fff5372308a097 SHA512 7c63bf1360902e6a55c7f4c15d08a716d54476875744e6f40ec51157de6c18bf75d8fdb921f26831017151e87649bd1a48041e007edd9a0afc5e9f9066bfd79d
diff --git a/llvm-core/polly/polly-23.0.0_pre20260331.ebuild b/llvm-core/polly/polly-23.0.0_pre20260331.ebuild
new file mode 100644
index 0000000000000..81e557ee61776
--- /dev/null
+++ b/llvm-core/polly/polly-23.0.0_pre20260331.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
+}