diff --git a/fail_db.txt b/fail_db.txt
index 6710abb5..b147a08b 100644
--- a/fail_db.txt
+++ b/fail_db.txt
@@ -293,7 +293,6 @@
 ./tests/ptr-22.ispc runfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O0 *
 ./tests/ptr-22.ispc runfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O0 *
 ./tests/ptr-assign-lhs-math-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc13.1 -O2 *
-./tests/ptr-22.ispc runfail  x86-64            knc   Linux LLVM 3.4   icpc13.1 -O0 *
 ./tests/atomics-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc13.1 -O0 *
 ./tests/atomics-10.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc13.1 -O0 *
 ./tests/atomics-11.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc13.1 -O0 *
@@ -480,3 +479,53 @@
 ./tests/reduce-equal-5.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc13.1 -O0 *
 ./tests/reduce-equal-6.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc13.1 -O0 *
 ./tests/reduce-equal-8.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc13.1 -O0 *
+./tests/pmuls_vi8.ispc runfail     x86     sse4-i16x8   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmuls_vi8.ispc runfail     x86-64     sse4-i16x8   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmuls_vi8.ispc runfail     x86     sse4-i32x8   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmuls_vi8.ispc runfail     x86-64     sse4-i32x8   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/scatter-int8-1.ispc runfail     x86     sse4-i16x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/scatter-int8-1.ispc runfail     x86-64     sse4-i16x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/scatter-int8-1.ispc runfail     x86     sse4-i32x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/scatter-int8-1.ispc runfail     x86-64     sse4-i32x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/store-int8.ispc runfail     x86     sse4-i16x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/store-int8.ispc runfail     x86-64     sse4-i16x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/store-int8.ispc runfail     x86     sse4-i32x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/store-int8.ispc runfail     x86-64     sse4-i32x8   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/pmuls_vi8.ispc runfail     x86     sse4-i16x8   Linux LLVM 3.6 g++4.9 -O2 *
+./tests/pmuls_vi8.ispc runfail     x86-64     sse4-i16x8   Linux LLVM 3.6 g++4.9 -O2 *
+./tests/pmuls_vi8.ispc runfail     x86     sse4-i32x8   Linux LLVM 3.6 g++4.9 -O2 *
+./tests/pmuls_vi8.ispc runfail     x86-64     sse4-i32x8   Linux LLVM 3.6 g++4.9 -O2 *
+./tests/scatter-int8-1.ispc runfail     x86     sse4-i16x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/scatter-int8-1.ispc runfail     x86-64     sse4-i16x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/scatter-int8-1.ispc runfail     x86     sse4-i32x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/scatter-int8-1.ispc runfail     x86-64     sse4-i32x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/store-int8.ispc runfail     x86     sse4-i16x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/store-int8.ispc runfail     x86-64     sse4-i16x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/store-int8.ispc runfail     x86     sse4-i32x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/store-int8.ispc runfail     x86-64     sse4-i32x8   Linux LLVM 3.6 g++4.9 -O0 *
+./tests/atomics-6.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/atomics-uniform-8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/atomics-uniform-9.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/paddus_vi16.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/paddus_vi8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmuls_i64.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i16.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i32.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i64.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/atomics-6.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/atomics-uniform-8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/atomics-uniform-9.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/atomics-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/atomics-uniform-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/paddus_vi16.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/paddus_vi8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmuls_i64.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i16.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i32.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i64.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/pmulus_i8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
+./tests/atomics-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/atomics-uniform-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O0 *
+./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O0 *