diff --git a/fail_db.txt b/fail_db.txt
index ad3abd4b..de924a32 100644
--- a/fail_db.txt
+++ b/fail_db.txt
@@ -169,3 +169,45 @@
 ./tests/ptr-19.ispc runfail  x86-64     generic-16   Linux LLVM 3.7 clang++3.4 -O0 *
 ./tests/ptr-22.ispc runfail  x86-64     generic-16   Linux LLVM 3.7 clang++3.4 -O0 *
 ./tests/test-143.ispc runfail  x86-64     generic-16   Linux LLVM 3.7 clang++3.4 -O0 *
+./tests/atomics-varyingptr-2.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/atomics-varyingptr-3.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/atomics-varyingptr-4.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/c-test-108.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/c-test-131.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/cfor-c-test-108.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/cfor-c-test-131.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/cfor-test-108.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/cfor-test-131.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/funcptr-varying-3.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/funcptr-varying-9.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/gather-int16-5.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/gather-int16-6.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/gather-int16-7.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/gather-int16-8.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/idiv.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/local-atomics-varyingptr-2.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/local-atomics-varyingptr-3.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/local-atomics-varyingptr-4.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/memcpy-varying.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/memmove-varying.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/memset-varying.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/packed-load-5.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/packed-store-2.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/packed-store2-2.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/paddus_vi64.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/pmuls_vi32.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/pmuls_vi64.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/pmulus_vi32.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/pmulus_vi64.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/reduce-add-int64.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/reduce-add-uint64-1.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/reduce-add-uint64.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/shift-2.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/soa-21.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/soa-22.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/soa-23.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/soa-24.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/soa-25.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/test-108.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/test-131.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *
+./tests/uint64-max-1.ispc runfail  x86-64            knl   Linux LLVM 3.4   icpc15.0 -O2 *