diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e83fe0d79..cdb41ef00 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -243,7 +243,7 @@ jobs:
             setenvs: export LLVM_VERSION=10.0.0
                             OPENIMAGEIO_CMAKE_FLAGS="-DBUILD_FMT_VERSION=7.0.1"
                             PUGIXML_VERSION=v1.10
-          - desc: latest releases gcc11/C++17 llvm12 boost1.71 exr3.1 py3.8 avx2 batch-b16avx512
+          - desc: latest releases gcc11/C++17 llvm13 boost1.71 exr3.1 py3.8 avx2 batch-b16avx512
             nametag: linux-latest-releases
             os: ubuntu-20.04
             cxx_compiler: g++-11
@@ -255,11 +255,11 @@ jobs:
             python_ver: 3.8
             simd: avx2,f16c
             batched: b8_AVX2,b8_AVX512,b16_AVX512
-            setenvs: export LLVM_VERSION=12.0.0
+            setenvs: export LLVM_VERSION=13.0.0
                             LLVM_DISTRO_NAME=ubuntu-20.04
                             OPENCOLORIO_VERSION=v2.1.1
                             PUGIXML_VERSION=v1.11.4
-          - desc: bleeding edge gcc11/C++17 llvm13 oiio/ocio/exr/pybind-master boost1.71 py3.9 avx2 batch-b16avx512
+          - desc: bleeding edge gcc11/C++17 llvm14 oiio/ocio/exr/pybind-master boost1.71 py3.9 avx2 batch-b16avx512
             nametag: linux-bleeding-edge
             os: ubuntu-20.04
             cxx_compiler: g++-11
@@ -271,8 +271,8 @@ jobs:
             python_ver: 3.9
             simd: avx2,f16c
             batched: b8_AVX2,b8_AVX512,b16_AVX512
-            setenvs: export LLVM_VERSION=13.0.0
-                            LLVM_DISTRO_NAME=ubuntu-20.04
+            setenvs: export LLVM_VERSION=14.0.0
+                            LLVM_DISTRO_NAME=ubuntu-18.04
                             OPENCOLORIO_VERSION=main
                             PUGIXML_VERSION=master
 
diff --git a/INSTALL.md b/INSTALL.md
index 1a2e4cece..ad4ff199e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -40,7 +40,7 @@ NEW or CHANGED dependencies since the last major release are **bold**.
     $OpenImageIO_ROOT/lib to be in your LD_LIBRARY_PATH (or
     DYLD_LIBRARY_PATH on OS X).
 
-* **[LLVM](http://www.llvm.org) 9, 10, 11, 12, or 13**, including clang
+* **[LLVM](http://www.llvm.org) 9, 10, 11, 12, 13, or 14**, including clang
   libraries.
 
 * [Boost](https://www.boost.org) 1.55 or newer (tested through boost 1.78)
diff --git a/src/build-scripts/build_llvm.bash b/src/build-scripts/build_llvm.bash
index 2e8f49fca..3b375e543 100755
--- a/src/build-scripts/build_llvm.bash
+++ b/src/build-scripts/build_llvm.bash
@@ -29,7 +29,7 @@ if [[ `uname` == "Linux" ]] ; then
     fi
     LLVMTAR=clang+llvm-${LLVM_VERSION}-x86_64-linux-gnu-${LLVM_DISTRO_NAME}.tar.xz
     echo LLVMTAR = $LLVMTAR
-    if [[ "$LLVM_VERSION" == "10.0.0" ]] || [[ "$LLVM_VERSION" == "11.0.0" ]] || [[ "$LLVM_VERSION" == "11.1.0" ]] || [[ "$LLVM_VERSION" == "12.0.0" ]] || [[ "$LLVM_VERSION" == "13.0.0" ]] ; then
+    if [[ "$LLVM_VERSION" == "10.0.0" ]] || [[ "$LLVM_VERSION" == "11.0.0" ]] || [[ "$LLVM_VERSION" == "11.1.0" ]] || [[ "$LLVM_VERSION" == "12.0.0" ]] || [[ "$LLVM_VERSION" == "13.0.0" ]]  || [[ "$LLVM_VERSION" == "14.0.0" ]]  || [[ "$LLVM_VERSION" == "14.0.1" ]] ; then
         # new
         curl --location https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VERSION}/${LLVMTAR} -o $LLVMTAR
     else
diff --git a/src/liboslexec/llvm_util.cpp b/src/liboslexec/llvm_util.cpp
index b30c89318..a917d621e 100644
--- a/src/liboslexec/llvm_util.cpp
+++ b/src/liboslexec/llvm_util.cpp
@@ -45,7 +45,11 @@
 #include <llvm/Support/raw_os_ostream.h>
 #include <llvm/IR/LegacyPassManager.h>
 #include <llvm/IR/ValueSymbolTable.h>
+#if OSL_LLVM_VERSION < 140
 #include <llvm/Support/TargetRegistry.h>
+#else
+#include <llvm/MC/TargetRegistry.h>
+#endif
 
 #include <llvm/Bitcode/BitcodeReader.h>
 #include <llvm/Bitcode/BitcodeWriter.h>
@@ -1677,8 +1681,6 @@ LLVM_Util::setup_optimization_passes (int optlevel, bool target_host)
         builder.DisableUnrollLoops = false;
         builder.SLPVectorize = false;
         builder.LoopVectorize = false;
-        builder.DisableTailCalls = false;
-
         if (target_machine)
             target_machine->adjustPassManager(builder);
 
diff --git a/testsuite/render-microfacet/ref/out-llvm14.exr b/testsuite/render-microfacet/ref/out-llvm14.exr
new file mode 100644
index 000000000..c34804b81
Binary files /dev/null and b/testsuite/render-microfacet/ref/out-llvm14.exr differ