diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f5600c1e..97d298cf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -91,8 +91,8 @@ jobs:
     - run: rustup component add llvm-tools-preview
     - name: Download compiler-rt reference sources
       run: |
-        curl -L -o code.tar.gz https://github.com/rust-lang/llvm-project/archive/rustc/13.0-2021-08-08.tar.gz
-        tar xzf code.tar.gz --strip-components 1 llvm-project-rustc-13.0-2021-08-08/compiler-rt
+        curl -L -o code.tar.gz https://github.com/rust-lang/llvm-project/archive/rustc/18.0-2024-02-13.tar.gz
+        tar xzf code.tar.gz --strip-components 1 llvm-project-rustc-18.0-2024-02-13/compiler-rt
         echo RUST_COMPILER_RT_ROOT=./compiler-rt >> $GITHUB_ENV
       shell: bash
 
diff --git a/ci/run.sh b/ci/run.sh
index b059d566..09728191 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -63,16 +63,11 @@ for rlib in $(echo $path); do
     stdout=$($NM -g --defined-only $rlib 2>&1)
     # NOTE On i586, It's normal that the get_pc_thunk symbol appears several
     # times so ignore it
-    #
-    # FIXME(#167) - we shouldn't ignore `__builtin_cl` style symbols here.
     set +e
     echo "$stdout" | \
       sort | \
       uniq -d | \
       grep -v __x86.get_pc_thunk | \
-      grep -v __builtin_cl | \
-      grep -v __builtin_ctz | \
-      grep -v __builtin_sadd_overflow | \
       grep 'T __'
 
     if test $? = 0; then