diff --git a/llvm-core/llvm/Manifest b/llvm-core/llvm/Manifest
index 3f6c4c0c0a00c..51540d841ff1d 100644
--- a/llvm-core/llvm/Manifest
+++ b/llvm-core/llvm/Manifest
@@ -20,4 +20,5 @@ DIST llvm-project-21.1.8.src.tar.xz.sig 119 BLAKE2B cffc1825f5778a3e3c128ec3e856
 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-43ccdbc84774da0ae4cb5131f2245a9633d977b9.tar.gz 276747748 BLAKE2B 874e5d95e8f3a8401ec989f093095be6203fa77c9729ef66981a13cbff91e6937a9925257f051650c820ea82f6ab8c03884a5a3599e2b450bed11b95c54cc440 SHA512 a84e2f97abc92bdf4da8a00cc89f22d28adef44b316f02992708ee2ebb78f0d4ce38254389a1408caa4b0846134af47ca4bccbfe987f014fefe439495bed3848
+DIST llvm-project-bb9934d4dfef9033ded36d26827dbb6d3ac1dd92.tar.gz 277566365 BLAKE2B 401320655d19b3d430d15a48e2daf1f00567ef87fd2d1f86c3d505a1b2f5920db6cbfa620bf1b0561cd318d6046830d5b19fe0e7b58647863372c6c96526526c SHA512 354b901ca80227abe6b0514eeba437f237ea2658dd1927bb6e1d3b0b298bdb0dfdb7855c0f359eea4977dd344f6d0f6d1ce486ea0100d4a5615a9139ef198fca
 DIST llvm-project-ce6af707aac85db6e176ad0faa3bfe608e1a68f5.tar.gz 277486383 BLAKE2B 03b4df53f1605e4cbe2a8b23a875b78f1336c5b0212d5e9591bf8f898abf0d947f8ff4551b2c9c0044fa18da1dd98e4ded4fe6ce7cb56df17e6cf9c1912afafe SHA512 5be1db6b9cabeed3b7db4c94c7dc06b5fac0dd5f4225a8dd06792494a0ca1dce45959b03e342edf2bce076fd19de81aa6f1451eda09047532e61546cf1f8d283
diff --git a/llvm-core/llvm/llvm-23.1.0_pre20260724.ebuild b/llvm-core/llvm/llvm-23.1.0_pre20260724.ebuild
new file mode 100644
index 0000000000000..ab1a35bdebcea
--- /dev/null
+++ b/llvm-core/llvm/llvm-23.1.0_pre20260724.ebuild
@@ -0,0 +1,572 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{12..14} )
+
+inherit cmake flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
+inherit toolchain-funcs
+
+DESCRIPTION="Low Level Virtual Machine"
+HOMEPAGE="https://llvm.org/"
+
+# Additional licenses:
+# 1. OpenBSD regex: Henry Spencer's license ('rc' in Gentoo) + BSD.
+# 2. xxhash: BSD.
+# 3. MD5 code: public-domain.
+# 4. ConvertUTF.h: TODO.
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA BSD public-domain rc"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="
+	+binutils-plugin +debug debuginfod doc exegesis libedit +libffi
+	test xml z3 zstd
+"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	virtual/zlib:=[${MULTILIB_USEDEP}]
+	debuginfod? (
+		net-misc/curl:=
+		dev-cpp/cpp-httplib:=
+	)
+	exegesis? ( dev-libs/libpfm:= )
+	libedit? ( dev-libs/libedit:0=[${MULTILIB_USEDEP}] )
+	libffi? ( >=dev-libs/libffi-3.0.13-r1:0=[${MULTILIB_USEDEP}] )
+	xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+	z3? ( >=sci-mathematics/z3-4.7.1:0=[${MULTILIB_USEDEP}] )
+	zstd? ( app-arch/zstd:=[${MULTILIB_USEDEP}] )
+"
+DEPEND="
+	${RDEPEND}
+	binutils-plugin? ( sys-libs/binutils-libs )
+"
+BDEPEND="
+	${PYTHON_DEPS}
+	dev-lang/perl
+	sys-devel/gnuconfig
+	kernel_Darwin? (
+		<llvm-runtimes/libcxx-${LLVM_VERSION}.9999
+	)
+	libffi? ( virtual/pkgconfig )
+"
+# There are no file collisions between these versions but having :0
+# installed means llvm-config there will take precedence.
+RDEPEND="
+	${RDEPEND}
+	!llvm-core/llvm:0
+"
+PDEPEND="
+	llvm-core/llvm-common
+	llvm-core/llvm-toolchain-symlinks:${LLVM_MAJOR}
+	binutils-plugin? ( >=llvm-core/llvmgold-${LLVM_MAJOR} )
+"
+
+LLVM_COMPONENTS=( llvm cmake libc mlir/utils/pygments third-party utils/docs )
+LLVM_MANPAGES=1
+LLVM_USE_TARGETS=provide
+llvm.org_set_globals
+
+[[ -n ${LLVM_MANPAGE_DIST} ]] && BDEPEND+=" doc? ( "
+BDEPEND+="
+	$(python_gen_any_dep '
+		dev-python/myst-parser[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	')
+"
+[[ -n ${LLVM_MANPAGE_DIST} ]] && BDEPEND+=" ) "
+
+python_check_deps() {
+	llvm_are_manpages_built || return 0
+
+	python_has_version -b "dev-python/myst-parser[${PYTHON_USEDEP}]" &&
+	python_has_version -b "dev-python/sphinx[${PYTHON_USEDEP}]"
+}
+
+check_uptodate() {
+	local prod_targets=(
+		$(sed -n -e '/set(LLVM_ALL_TARGETS/,/)/p' CMakeLists.txt \
+			| tail -n +2 | head -n -1)
+	)
+	local all_targets=(
+		lib/Target/*/
+	)
+	all_targets=( "${all_targets[@]#lib/Target/}" )
+	all_targets=( "${all_targets[@]%/}" )
+
+	local exp_targets=() i
+	for i in "${all_targets[@]}"; do
+		has "${i}" "${prod_targets[@]}" || exp_targets+=( "${i}" )
+	done
+
+	local outdated
+	if [[ ${exp_targets[*]} != ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]} ]]; then
+		eerror "ALL_LLVM_EXPERIMENTAL_TARGETS are outdated!"
+		eerror "    Have: ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]}"
+		eerror "Expected: ${exp_targets[*]}"
+		eerror
+		outdated=1
+	fi
+
+	if [[ ${prod_targets[*]} != ${ALL_LLVM_PRODUCTION_TARGETS[*]} ]]; then
+		eerror "ALL_LLVM_PRODUCTION_TARGETS are outdated!"
+		eerror "    Have: ${ALL_LLVM_PRODUCTION_TARGETS[*]}"
+		eerror "Expected: ${prod_targets[*]}"
+		outdated=1
+	fi
+
+	[[ ${outdated} ]] && die "Update ALL_LLVM*_TARGETS"
+}
+
+check_distribution_components() {
+	if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]]; then
+		local all_targets=() my_targets=() l
+		cd "${BUILD_DIR}" || die
+
+		while read -r l; do
+			if [[ ${l} == install-*-stripped:* ]]; then
+				l=${l#install-}
+				l=${l%%-stripped*}
+
+				case ${l} in
+					# shared libs
+					LLVM|LLVMgold)
+						;;
+					# TableGen lib + deps
+					LLVMDemangle|LLVMSupport|LLVMSupportLSP|LLVMTableGen)
+						;;
+					# for mlir-tblgen
+					LLVMCodeGenTypes)
+						;;
+					# used by lldb
+					LLVMDebuginfod|LLVMHTTP)
+						;;
+					# testing libraries
+					LLVMTestingAnnotations|LLVMTestingSupport)
+						;;
+					# static libs
+					LLVM*)
+						continue
+						;;
+					# meta-targets
+					distribution|llvm-libraries)
+						continue
+						;;
+					# used only w/ USE=doc
+					docs-llvm-html)
+						use doc || continue
+						;;
+					# used only w/ USE=debuginfd
+					llvm-debuginfod)
+						use debuginfod || continue
+						;;
+					# used only w/ USE=xml
+					llvm-mt)
+						use xml || continue
+						;;
+				esac
+
+				all_targets+=( "${l}" )
+			fi
+		done < <(${NINJA} -t targets all)
+
+		while read -r l; do
+			my_targets+=( "${l}" )
+		done < <(get_distribution_components $"\n")
+
+		local add=() remove=()
+		for l in "${all_targets[@]}"; do
+			if ! has "${l}" "${my_targets[@]}"; then
+				add+=( "${l}" )
+			fi
+		done
+		for l in "${my_targets[@]}"; do
+			if ! has "${l}" "${all_targets[@]}"; then
+				remove+=( "${l}" )
+			fi
+		done
+
+		if [[ ${#add[@]} -gt 0 || ${#remove[@]} -gt 0 ]]; then
+			eerror "get_distribution_components() is outdated!"
+			eerror "   Add: ${add[*]}"
+			eerror "Remove: ${remove[*]}"
+			die "Update get_distribution_components()!"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+src_prepare() {
+	# disable use of SDK on OSX, bug #568758
+	sed -i -e 's/xcrun/false/' utils/lit/lit/util.py || die
+
+	# Update config.guess to support more systems
+	cp "${BROOT}/usr/share/gnuconfig/config.guess" cmake/ || die
+
+	# Disable lit tests (we run them in dev-python/lit).
+	> utils/lit/CMakeLists.txt || die
+
+	# Verify that the ebuild is up-to-date
+	check_uptodate
+
+	llvm.org_src_prepare
+}
+
+get_distribution_components() {
+	local sep=${1-;}
+
+	local out=(
+		# shared libs
+		LLVM
+		LTO
+		Remarks
+
+		# tools
+		llvm-config
+
+		# common stuff
+		cmake-exports
+		llvm-headers
+
+		# libraries needed for clang-tblgen
+		LLVMDemangle
+		LLVMSupport
+		LLVMTableGen
+		# mlir-tblgen
+		LLVMCodeGenTypes
+		LLVMSupportLSP
+
+		# testing libraries
+		llvm_gtest
+		llvm_gtest_main
+		LLVMTestingAnnotations
+		LLVMTestingSupport
+	)
+
+	if multilib_is_native_abi; then
+		out+=(
+			# library used by lldb
+			LLVMDebuginfod
+			LLVMHTTP
+
+			# utilities
+			llvm-tblgen
+			llvm-test-mustache-spec
+			FileCheck
+			llvm-PerfectShuffle
+			count
+			not
+			yaml-bench
+			UnicodeNameMappingGenerator
+
+			# tools
+			clang-offload-packager
+			dsymutil
+			llc
+			lli
+			lli-child-target
+			llubi
+			llvm-addr2line
+			llvm-ar
+			llvm-as
+			llvm-bcanalyzer
+			llvm-bitcode-strip
+			llvm-c-test
+			llvm-cas
+			llvm-cat
+			llvm-cfi-verify
+			llvm-cgdata
+			llvm-config
+			llvm-cov
+			llvm-ctxprof-util
+			llvm-cvtres
+			llvm-cxxdump
+			llvm-cxxfilt
+			llvm-cxxmap
+			llvm-debuginfo-analyzer
+			llvm-debuginfod-find
+			llvm-diff
+			llvm-dis
+			llvm-dlltool
+			llvm-dwarfdump
+			llvm-dwarfutil
+			llvm-dwp
+			llvm-exegesis
+			llvm-extract
+			llvm-extract-bundle-entry
+			llvm-gpu-loader
+			llvm-gsymutil
+			llvm-ifs
+			llvm-install-name-tool
+			llvm-ir2vec
+			llvm-jitlink
+			llvm-jitlink-executor
+			llvm-lib
+			llvm-libtool-darwin
+			llvm-link
+			llvm-lipo
+			llvm-lto
+			llvm-lto2
+			llvm-mc
+			llvm-mca
+			llvm-ml
+			llvm-ml64
+			llvm-modextract
+			llvm-nm
+			llvm-objcopy
+			llvm-objdump
+			llvm-offload-binary
+			llvm-offload-wrapper
+			llvm-opt-report
+			llvm-otool
+			llvm-pdbutil
+			llvm-profdata
+			llvm-profgen
+			llvm-ranlib
+			llvm-rc
+			llvm-readelf
+			llvm-readobj
+			llvm-readtapi
+			llvm-reduce
+			llvm-remarkutil
+			llvm-rtdyld
+			llvm-sim
+			llvm-size
+			llvm-split
+			llvm-stress
+			llvm-strings
+			llvm-strip
+			llvm-symbolizer
+			llvm-tli-checker
+			llvm-undname
+			llvm-windres
+			llvm-xray
+			obj2yaml
+			opt
+			reduce-chunk-list
+			sancov
+			sanstats
+			split-file
+			verify-uselistorder
+			yaml2obj
+
+			# python modules
+			opt-viewer
+		)
+
+		if llvm_are_manpages_built; then
+			out+=(
+				# manpages
+				docs-dsymutil-man
+				docs-llvm-dwarfdump-man
+				docs-llvm-man
+			)
+		fi
+		use doc && out+=(
+			docs-llvm-html
+		)
+
+		use binutils-plugin && out+=(
+			LLVMgold
+		)
+		use debuginfod && out+=(
+			llvm-debuginfod
+		)
+		use xml && out+=(
+			llvm-mt
+		)
+	fi
+
+	printf "%s${sep}" "${out[@]}"
+}
+
+multilib_src_configure() {
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
+	local ffi_cflags ffi_ldflags
+	if use libffi; then
+		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+		ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		# disable appending VCS revision to the version to improve
+		# direct cache hit ratio
+		-DLLVM_APPEND_VC_REV=OFF
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DLLVM_BUILD_LLVM_DYLIB=ON
+		-DLLVM_LINK_LLVM_DYLIB=ON
+		-DLLVM_DISTRIBUTION_COMPONENTS=$(get_distribution_components)
+
+		# cheap hack: LLVM combines both anyway, and the only difference
+		# is that the former list is explicitly verified at cmake time
+		-DLLVM_TARGETS_TO_BUILD=""
+		-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+		-DLLVM_INCLUDE_BENCHMARKS=OFF
+		-DLLVM_INCLUDE_TESTS=ON
+		-DLLVM_BUILD_TESTS=$(usex test)
+		-DLLVM_INSTALL_GTEST=ON
+
+		-DLLVM_ENABLE_FFI=$(usex libffi)
+		-DLLVM_ENABLE_LIBEDIT=$(usex libedit)
+		-DLLVM_ENABLE_LIBXML2=$(usex xml)
+		-DLLVM_ENABLE_ASSERTIONS=$(usex debug)
+		-DLLVM_ENABLE_LIBPFM=$(usex exegesis)
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+		-DLLVM_ENABLE_Z3_SOLVER=$(usex z3)
+		-DLLVM_ENABLE_ZLIB=FORCE_ON
+		-DLLVM_ENABLE_ZSTD=$(usex zstd FORCE_ON OFF)
+		-DLLVM_ENABLE_CURL=$(usex debuginfod)
+		-DLLVM_ENABLE_HTTPLIB=$(usex debuginfod)
+		-DLLVM_UNREACHABLE_OPTIMIZE=OFF
+
+		-DLLVM_HOST_TRIPLE="${CHOST}"
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+
+		# disable OCaml bindings (now in dev-ml/llvm)
+		-DOCAMLFIND=NO
+	)
+
+	local suffix=
+	if [[ -n ${EGIT_VERSION} && ${EGIT_BRANCH} != release/* ]]; then
+		# the ABI of the main branch is not stable, so let's include
+		# the commit id in the SOVERSION to contain the breakage
+		suffix+="git${EGIT_VERSION::8}"
+	fi
+	if [[ $(tc-get-cxx-stdlib) == libc++ ]]; then
+		# Smart hack: alter version suffix -> SOVERSION when linking
+		# against libc++. This way we won't end up mixing LLVM libc++
+		# libraries with libstdc++ clang, and the other way around.
+		suffix+="+libcxx"
+		mycmakeargs+=(
+			-DLLVM_ENABLE_LIBCXX=ON
+		)
+	fi
+	mycmakeargs+=(
+		-DLLVM_VERSION_SUFFIX="${suffix}"
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	if multilib_is_native_abi; then
+		local build_docs=OFF
+		if llvm_are_manpages_built; then
+			build_docs=ON
+			mycmakeargs+=(
+				-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+				-DLLVM_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+				-DSPHINX_WARNINGS_AS_ERRORS=OFF
+			)
+		fi
+
+		mycmakeargs+=(
+			-DLLVM_BUILD_DOCS=${build_docs}
+			-DLLVM_ENABLE_OCAMLDOC=OFF
+			-DLLVM_ENABLE_SPHINX=${build_docs}
+			-DLLVM_ENABLE_DOXYGEN=OFF
+			-DLLVM_INSTALL_UTILS=ON
+		)
+		use binutils-plugin && mycmakeargs+=(
+			-DLLVM_BINUTILS_INCDIR="${EPREFIX}"/usr/include
+		)
+	fi
+
+	use kernel_Darwin && mycmakeargs+=(
+		# Use our libtool instead of looking it up with xcrun
+		-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
+	)
+
+	# LLVM can have very high memory consumption while linking,
+	# exhausting the limit on 32-bit linker executable
+	use x86 && local -x LDFLAGS="${LDFLAGS} -Wl,--no-keep-memory"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	grep -q -E "^CMAKE_PROJECT_VERSION_MAJOR(:.*)?=${LLVM_MAJOR}$" \
+			CMakeCache.txt ||
+		die "Incorrect version, did you update _LLVM_MAIN_MAJOR?"
+	multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+	tc-env_build cmake_build distribution
+
+	pax-mark m "${BUILD_DIR}"/bin/llvm-rtdyld
+	pax-mark m "${BUILD_DIR}"/bin/lli
+	pax-mark m "${BUILD_DIR}"/bin/lli-child-target
+
+	if use test; then
+		pax-mark m "${BUILD_DIR}"/unittests/ExecutionEngine/Orc/OrcJITTests
+		pax-mark m "${BUILD_DIR}"/unittests/ExecutionEngine/MCJIT/MCJITTests
+		pax-mark m "${BUILD_DIR}"/unittests/Support/SupportTests
+	fi
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check
+}
+
+src_install() {
+	local MULTILIB_CHOST_TOOLS=(
+		/usr/lib/llvm/${LLVM_MAJOR}/bin/llvm-config
+	)
+
+	local MULTILIB_WRAPPED_HEADERS=(
+		/usr/include/llvm/Config/llvm-config.h
+	)
+
+	local LLVM_LDPATHS=()
+	multilib-minimal_src_install
+
+	# move wrapped headers back
+	mv "${ED}"/usr/include "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/include || die
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-distribution
+
+	# move headers to /usr/include for wrapping
+	rm -rf "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/include "${ED}"/usr/include || die
+
+	LLVM_LDPATHS+=( "${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/$(get_libdir)" )
+}
+
+multilib_src_install_all() {
+	local revord=$(( 9999 - ${LLVM_MAJOR} ))
+	newenvd - "60llvm-${revord}" <<-_EOF_
+		PATH="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin"
+		# we need to duplicate it in ROOTPATH for Portage to respect...
+		ROOTPATH="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin"
+		MANPATH="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+		LDPATH="$( IFS=:; echo "${LLVM_LDPATHS[*]}" )"
+	_EOF_
+
+	docompress "/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+	llvm_install_manpages
+}
+
+pkg_postinst() {
+	elog "You can find additional opt-viewer utility scripts in:"
+	elog "  ${EROOT}/usr/lib/llvm/${LLVM_MAJOR}/share/opt-viewer"
+	elog "To use these scripts, you will need Python along with the following"
+	elog "packages:"
+	elog "  dev-python/pygments (for opt-viewer)"
+	elog "  dev-python/pyyaml (for all of them)"
+}