diff --git a/fail_db.txt b/fail_db.txt
index 9def9b6c..6710abb5 100644
--- a/fail_db.txt
+++ b/fail_db.txt
@@ -257,6 +257,32 @@
 ./tests/reduce-equal-5.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
 ./tests/reduce-equal-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
 ./tests/reduce-equal-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
+./tests/atomics-6.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/atomics-uniform-8.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/atomics-uniform-9.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/paddus_vi16.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/paddus_vi8.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmuls_i64.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i16.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i32.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i64.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i8.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/atomics-6.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O0 *
+./tests/atomics-uniform-8.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O0 *
+./tests/atomics-uniform-9.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O0 *
+./tests/atomics-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/atomics-uniform-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/paddus_vi16.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/paddus_vi8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmuls_i64.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i16.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i32.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i64.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/pmulus_i8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
+./tests/atomics-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
+./tests/atomics-uniform-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
+./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
 .\tests\foreach-double-1.ispc runfail     x86     avx2-i32x8 Windows LLVM 3.5         cl -O2 *
 .\tests\foreach-double-1.ispc runfail     x86    avx2-i32x16 Windows LLVM 3.5         cl -O2 *
 .\tests\foreach-double-1.ispc runfail     x86     avx2-i64x4 Windows LLVM 3.5         cl -O2 *