diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 597783e4e..52eacf620 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,18 +1,47 @@
 name: "Build"
-on: [push]
+on: [push, pull_request]
 jobs:
+  linux-clang-ASanAndUBSan-build:
+    runs-on: ${{matrix.os}}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04]
+        clang: [8]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+            # Nix Flakes doesn't work on shallow clones
+            fetch-depth: 0
+      - uses: cachix/install-nix-action@v18
+        with:
+          install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20201221_9fab14a/install
+          extra_nix_config: |
+            experimental-features = nix-command flakes ca-references
+      - name: nix build hobbesPackages/clang-${{ matrix.clang }}-ASanAndUBSan/hobbes
+        run: |
+          nix build .#hobbesPackages/clang-${{ matrix.clang }}-ASanAndUBSan/hobbes
+      - name: nix log hobbesPackages/clang-${{ matrix.clang }}-ASanAndUBSan/hobbes
+        if: ${{ always() }}
+        run: |
+          nix log  .#hobbesPackages/clang-${{ matrix.clang }}-ASanAndUBSan/hobbes &> ${{ matrix.os }}-clang-${{ matrix.clang }}-ASanAndUBSan-hobbes.log
+      - name: upload log ${{ matrix.os }}-clang-${{ matrix.clang }}-ASanAndUBSan-hobbes.log
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: output-log-file
+          path: ${{ matrix.os }}-clang-${{ matrix.clang }}-ASanAndUBSan-hobbes.log
   linux-clang-build:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
         os: [ubuntu-20.04]
-        clang: [6, 8, 10, 11]
+        clang: [6, 8, 10, 11, 12]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
             # Nix Flakes doesn't work on shallow clones
             fetch-depth: 0
-      - uses: cachix/install-nix-action@v12
+      - uses: cachix/install-nix-action@v18
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20201221_9fab14a/install
           extra_nix_config: |
@@ -20,9 +49,13 @@ jobs:
       - name: nix build hobbesPackages/clang-${{ matrix.clang }}/hobbes
         run: |
           nix build .#hobbesPackages/clang-${{ matrix.clang }}/hobbes
+      - name: nix log hobbesPackages/clang-${{ matrix.clang }}/hobbes
+        if: ${{ always() }}
+        run: |
           nix log  .#hobbesPackages/clang-${{ matrix.clang }}/hobbes &> ${{ matrix.os }}-clang-${{ matrix.clang }}-hobbes.log
       - name: upload log ${{ matrix.os }}-clang-${{ matrix.clang }}-hobbes.log
-        uses: actions/upload-artifact@v1
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v3
         with:
           name: output-log-file
           path: ${{ matrix.os }}-clang-${{ matrix.clang }}-hobbes.log
@@ -32,24 +65,27 @@ jobs:
       matrix:
         os: [ubuntu-20.04]
         gcc: [10]
-        llvm: [6, 8, 10, 11]
+        llvm: [6, 8, 10, 11, 12]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
             # Nix Flakes doesn't work on shallow clones
             fetch-depth: 0
-      - uses: cachix/install-nix-action@v12
+      - uses: cachix/install-nix-action@v18
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20201221_9fab14a/install
           extra_nix_config: |
             experimental-features = nix-command flakes ca-references
-      - name: nix build hobbesPackages/clang-${{ matrix.clang }}/hobbes
+      - name: nix build hobbesPackages/gcc-${{ matrix.gcc }}/llvm-${{ matrix.llvm }}/hobbes
         run: |
           nix build .#hobbesPackages/gcc-${{ matrix.gcc }}/llvm-${{ matrix.llvm }}/hobbes
+      - name: nix log hobbesPackages/gcc-${{ matrix.gcc }}/llvm-${{ matrix.llvm }}/hobbes
+        if: ${{ always() }}
+        run: |
           nix log  .#hobbesPackages/gcc-${{ matrix.gcc }}/llvm-${{ matrix.llvm }}/hobbes &> ${{ matrix.os }}-gcc-${{ matrix.gcc }}-llvm-${{ matrix.llvm }}-hobbes.log
-      - name: upload log ${{ matrix.os }}-gcc-${{ matrix.gcc }}-llvm-${{ matrix.llvm }}-hobbes.log
-        uses: actions/upload-artifact@v1
+      - name: upload log ${{ matrix.os }}-gcc-${{ matrix.gcc }}-llvm-${{ matrix.gitllvm }}-hobbes.log
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v3
         with:
           name: output-log-file
-          path: ${{ matrix.os }}-gcc-${{ matrix.gcc }}-llvm-${{ matrix.llvm }}-hobbes.log
-
+          path: ${{ matrix.os }}-gcc-${{ matrix.gcc }}-llvm-${{ matrix.llvm }}-hobbes.log
\ No newline at end of file
diff --git a/lib/hobbes/eval/func.C b/lib/hobbes/eval/func.C
index 10da22bde..d5b987b93 100644
--- a/lib/hobbes/eval/func.C
+++ b/lib/hobbes/eval/func.C
@@ -189,6 +189,13 @@ BOP(i16mul, CreateMul,  int128_t, int128_t, int128_t);
 BOP(i16div, CreateSDiv, int128_t, int128_t, int128_t);
 BOP(i16rem, CreateSRem, int128_t, int128_t, int128_t);
 
+BOP(i16shl, CreateShl, int128_t, int128_t, int128_t);
+BOP(i16lshr, CreateLShr, int128_t, int128_t, int128_t);
+BOP(i16ashr, CreateAShr, int128_t, int128_t, int128_t);
+BOP(i16and, CreateAnd, int128_t, int128_t, int128_t);
+BOP(i16or, CreateOr, int128_t, int128_t, int128_t);
+BOP(i16xor, CreateXor, int128_t, int128_t, int128_t);
+
 BOP(i16eq,  CreateICmpEQ,  int128_t, int128_t, bool);
 BOP(i16neq, CreateICmpNE,  int128_t, int128_t, bool);
 BOP(i16lt,  CreateICmpSLT, int128_t, int128_t, bool);
@@ -1015,6 +1022,8 @@ void initDefOperators(cc* c) {
   DEC(iadd);   DEC(isub);   DEC(imul);   DEC(idiv);   DEC(irem);
   DEC(ladd);   DEC(lsub);   DEC(lmul);   DEC(ldiv);   DEC(lrem);
   DEC(i16add); DEC(i16sub); DEC(i16mul); DEC(i16div); DEC(i16rem);
+  DEC(i16shl); DEC(i16lshr); DEC(i16ashr); DEC(i16and); DEC(i16or);DEC(i16xor);
+
   DEC(fadd);   DEC(fsub);   DEC(fmul);   DEC(fdiv);
   DEC(dadd);   DEC(dsub);   DEC(dmul);   DEC(ddiv);