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deleted file mode 100644
index 497d374..0000000
--- a/clang-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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-oid sha256:e43e1729713ac0241aa026fa2f98bb54e74a196a6fed60ab4819134a428eb6d8
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diff --git a/clang-18.1.3.src.tar.xz.sig b/clang-18.1.3.src.tar.xz.sig
deleted file mode 100644
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diff --git a/clang-18.1.4.src.tar.xz b/clang-18.1.4.src.tar.xz
new file mode 100644
index 0000000..ae287a1
--- /dev/null
+++ b/clang-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
index d244834..0000000
--- a/clang-docs-18.1.3.src.tar.xz
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new file mode 100644
index 0000000..4f54ded
--- /dev/null
+++ b/clang-docs-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
index 2c698e3..0000000
--- a/clang-tools-extra-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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deleted file mode 100644
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new file mode 100644
index 0000000..f169cb5
--- /dev/null
+++ b/clang-tools-extra-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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new file mode 100644
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deleted file mode 100644
index de40639..0000000
--- a/cmake-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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new file mode 100644
index 0000000..a71d93f
--- /dev/null
+++ b/cmake-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
index e7262ce..0000000
--- a/compiler-rt-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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new file mode 100644
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--- /dev/null
+++ b/compiler-rt-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
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@@ -1,3 +0,0 @@
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new file mode 100644
index 0000000..d84feef
--- /dev/null
+++ b/libcxx-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
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--- a/libcxxabi-18.1.3.src.tar.xz
+++ /dev/null
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new file mode 100644
index 0000000..a3983fd
--- /dev/null
+++ b/libcxxabi-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
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--- a/lld-18.1.3.src.tar.xz
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@@ -1,3 +0,0 @@
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new file mode 100644
index 0000000..bbeefdf
--- /dev/null
+++ b/lld-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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+size 1563244
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deleted file mode 100644
index d879765..0000000
--- a/lldb-18.1.3.src.tar.xz
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@@ -1,3 +0,0 @@
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new file mode 100644
index 0000000..3025f67
--- /dev/null
+++ b/lldb-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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deleted file mode 100644
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--- a/llvm-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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deleted file mode 100644
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diff --git a/llvm-18.1.4.src.tar.xz b/llvm-18.1.4.src.tar.xz
new file mode 100644
index 0000000..c15def1
--- /dev/null
+++ b/llvm-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:954df1e7a7768ec0c9804da75e5332d68bcc7396c475faf6ed77e7150e4bcdcd
+size 61991952
diff --git a/llvm-18.1.4.src.tar.xz.sig b/llvm-18.1.4.src.tar.xz.sig
new file mode 100644
index 0000000..5c2b5ee
Binary files /dev/null and b/llvm-18.1.4.src.tar.xz.sig differ
diff --git a/llvm-do-not-install-static-libraries.patch b/llvm-do-not-install-static-libraries.patch
index d30fb98..10c31aa 100644
--- a/llvm-do-not-install-static-libraries.patch
+++ b/llvm-do-not-install-static-libraries.patch
@@ -2,10 +2,10 @@ This has similar effect as simply deleting the static libraries which we don't
 want after installation. By not copying them in the first place we reduce the
 disk usage during installation.
 
-Index: clang-18.1.3.src/cmake/modules/AddClang.cmake
+Index: clang-18.1.4.src/cmake/modules/AddClang.cmake
 ===================================================================
---- a/clang-18.1.3.src/cmake/modules/AddClang.cmake
-+++ b/clang-18.1.3.src/cmake/modules/AddClang.cmake
+--- a/clang-18.1.4.src/cmake/modules/AddClang.cmake
++++ b/clang-18.1.4.src/cmake/modules/AddClang.cmake
 @@ -106,12 +106,15 @@ macro(add_clang_library name)
  
        if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ARG_INSTALL_WITH_TOOLCHAIN)
@@ -68,10 +68,10 @@ Index: cmake/modules/AddLLVM.cmake
    endif()
    if (ARG_MODULE)
      set_target_properties(${name} PROPERTIES FOLDER "Loadable modules")
-Index: lld-18.1.3.src/cmake/modules/AddLLD.cmake
+Index: lld-18.1.4.src/cmake/modules/AddLLD.cmake
 ===================================================================
---- a/lld-18.1.3.src/cmake/modules/AddLLD.cmake
-+++ b/lld-18.1.3.src/cmake/modules/AddLLD.cmake
+--- a/lld-18.1.4.src/cmake/modules/AddLLD.cmake
++++ b/lld-18.1.4.src/cmake/modules/AddLLD.cmake
 @@ -17,13 +17,6 @@ macro(add_lld_library name)
  
    if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
@@ -86,10 +86,10 @@ Index: lld-18.1.3.src/cmake/modules/AddLLD.cmake
      if (${ARG_SHARED} AND NOT CMAKE_CONFIGURATION_TYPES)
        add_llvm_install_targets(install-${name}
          DEPENDS ${name}
-Index: polly-18.1.3.src/cmake/polly_macros.cmake
+Index: polly-18.1.4.src/cmake/polly_macros.cmake
 ===================================================================
---- a/polly-18.1.3.src/cmake/polly_macros.cmake
-+++ b/polly-18.1.3.src/cmake/polly_macros.cmake
+--- a/polly-18.1.4.src/cmake/polly_macros.cmake
++++ b/polly-18.1.4.src/cmake/polly_macros.cmake
 @@ -42,15 +42,17 @@ macro(add_polly_library name)
      llvm_config(${name} ${LLVM_LINK_COMPONENTS})
    endif( LLVM_LINK_COMPONENTS )
@@ -116,10 +116,10 @@ Index: polly-18.1.3.src/cmake/polly_macros.cmake
  endmacro(add_polly_library)
  
  macro(add_polly_loadable_module name)
-Index: polly-18.1.3.src/lib/CMakeLists.txt
+Index: polly-18.1.4.src/lib/CMakeLists.txt
 ===================================================================
---- a/polly-18.1.3.src/lib/CMakeLists.txt
-+++ b/polly-18.1.3.src/lib/CMakeLists.txt
+--- a/polly-18.1.4.src/lib/CMakeLists.txt
++++ b/polly-18.1.4.src/lib/CMakeLists.txt
 @@ -109,7 +109,7 @@ set_target_properties(PollyCore PROPERTI
  # It depends on all library it needs, such that with
  # LLVM_POLLY_LINK_INTO_TOOLS=ON, its dependencies like PollyISL are linked as
diff --git a/llvm-docs-18.1.3.src.tar.xz b/llvm-docs-18.1.3.src.tar.xz
deleted file mode 100644
index 94d7874..0000000
--- a/llvm-docs-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7908437fefd70bd376088d6bcee1f99b8fee0c9230851aa89000c6b31a3f5fec
-size 7207592
diff --git a/llvm-docs-18.1.4.src.tar.xz b/llvm-docs-18.1.4.src.tar.xz
new file mode 100644
index 0000000..3c65232
--- /dev/null
+++ b/llvm-docs-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7cd2c15773a549bd39565b8731561d8f1f7a7917d98b95815abbe7c0795c872a
+size 7207064
diff --git a/llvm18.changes b/llvm18.changes
index 12cdd84..4f2d77f 100644
--- a/llvm18.changes
+++ b/llvm18.changes
@@ -1,3 +1,20 @@
+-------------------------------------------------------------------
+Thu Apr 18 21:22:11 UTC 2024 - Aaron Puchert <aaronpuchert@alice-dsl.net>
+
+- Update to version 18.1.4.
+  * Fixes an issue with Arm64EC code generation where calls to some
+    intrinsics implemented in compiler-rt used the wrong name
+    mangling, eventually resulting in unresolved symbol errors
+    during linking.
+  * Fixed an incorrect poison-generating flag preservation in
+    `InstSimplify`. It will fix a miscompilation on RISCV, which
+    turns the incorrect `or disjoint` into an `add`.
+  * Save/restore routines for RV32E/RV64E are added to compiler-rt.
+  * Fix regressions introduced in LLVM 18.1.3 in MIPS atomicrmw
+    min/max codegen.
+- Include module files for libc++ in libc++-devel.
+- Rebase llvm-do-not-install-static-libraries.patch.
+
 -------------------------------------------------------------------
 Thu Apr  4 14:31:53 UTC 2024 - Aaron Puchert <aaronpuchert@alice-dsl.net>
 
diff --git a/llvm18.spec b/llvm18.spec
index 46c45ec..f913b1d 100644
--- a/llvm18.spec
+++ b/llvm18.spec
@@ -19,7 +19,7 @@
 %global _sonum  18
 %global _minor  %{_sonum}.1
 %global _soname %{_minor}%{?_sosuffix}
-%global _patch_level 3
+%global _patch_level 4
 %global _relver %{_minor}.%{_patch_level}
 %global _version %_relver%{?_rc:rc%_rc}
 %global _tagver %_relver%{?_rc:-rc%_rc}
@@ -1117,6 +1117,7 @@ export LD_LIBRARY_PATH=%{sourcedir}/build/%{_lib}
 %if %{with libcxx}
     -DLIBCXX_ENABLE_SHARED=YES \
     -DLIBCXX_ENABLE_STATIC=NO \
+    -DLIBCXX_INSTALL_MODULES=ON \
     -DLIBCXXABI_ENABLE_SHARED=YES \
     -DLIBCXXABI_ENABLE_STATIC=NO \
     -DLIBCXXABI_USE_LLVM_UNWINDER:BOOL=OFF \
@@ -1730,10 +1731,13 @@ fi
 
 %files %{multisource libcxx_devel} libc++-devel
 %license CREDITS.TXT LICENSE.TXT
+%{_libdir}/libc++.modules.json
 %{_libdir}/libc++.so
 %{_libdir}/libc++experimental.a
 %dir %{_includedir}/c++/
 %{_includedir}/c++/v%{_socxx}
+%dir %{_datadir}/libc++/
+%{_datadir}/libc++/v%{_socxx}
 
 %files %{multisource libcxx_devel} libc++abi-devel
 %license CREDITS.TXT LICENSE.TXT
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deleted file mode 100644
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--- a/openmp-18.1.3.src.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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-size 1320216
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new file mode 100644
index 0000000..5873ff3
--- /dev/null
+++ b/openmp-18.1.4.src.tar.xz
@@ -0,0 +1,3 @@
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+size 1320244
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