diff --git a/fail_db.txt b/fail_db.txt
index 4fc52eda..e43fe716 100644
--- a/fail_db.txt
+++ b/fail_db.txt
@@ -224,46 +224,6 @@
 ./tests/pmulus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.7   clang++3.4 -O2 *
 ./tests/pmulus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.7   clang++3.4 -O0 *
 ./tests/pmulus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.7   clang++3.4 -O2 *
-
-./tests/reduce-max-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/reduce-max-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/reduce-max-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/reduce-max-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/reduce-min-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/reduce-min-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/reduce-min-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/reduce-min-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/idiv.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/idiv.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/paddus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/paddus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/pmuls_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/pmuls_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/pmuls_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/pmuls_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-./tests/pmulus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/pmulus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O0 *
-./tests/pmulus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   icpc15.0 -O2 *
-
-./tests/reduce-max-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/reduce-max-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/reduce-max-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/reduce-max-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/reduce-min-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/reduce-min-int64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/reduce-min-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/reduce-min-uint64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/idiv.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/idiv.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/paddus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/paddus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/pmuls_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/pmuls_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/pmuls_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/pmuls_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/pmulus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/pmulus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/pmulus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
 % End of avx-512 untracked
 
 % Tracked in https://llvm.org/bugs/show_bug.cgi?id=23484 (anonymous namespace bug)
@@ -420,25 +380,3 @@
 ./tests/short-vec-7.ispc compfail     x86-64     generic-16   Linux LLVM 3.8 clang++3.4 -O0 *
 ./tests/short-vec-7.ispc compfail     x86-64     generic-16   Linux LLVM 3.8 clang++3.4 -O2 *
 % End of anonymous namespace bug
-
-% Tracked in https://llvm.org/bugs/show_bug.cgi?id=26338 
-% /CodeGen/SelectionDAG/SelectionDAG.cpp:1110: llvm::SDValue llvm::SelectionDAG::getConsts()) + 1 < 2)
-./tests/gather-float-7.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/gather-float-8.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/gather-int32-7.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/gather-int32-8.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/psubus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/psubus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O0 *
-./tests/soa-14.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-./tests/soa-27.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.8   clang++3.4 -O2 *
-
-./tests/gather-float-7.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O2 *
-./tests/gather-float-8.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O2 *
-./tests/gather-int32-7.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O2 *
-./tests/gather-int32-8.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O2 *
-./tests/psubus_i64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O0 *
-./tests/psubus_vi64.ispc compfail     x86 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O0 *
-./tests/soa-14.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O2 *
-./tests/soa-27.ispc compfail     x86-64 avx512knl-i32x16   Linux LLVM 3.9   clang++3.4 -O2 *
-% /CodeGen/SelectionDAG/SelectionDAG.cpp:1110: llvm::SDValue llvm::SelectionDAG::getConsts()) + 1 < 2)
-% Gather/Scatter bug
diff --git a/llvm_patches/3_8_r259342-AVX-512-SETCC-lowering.patch b/llvm_patches/3_8_r259342-AVX-512-SETCC-lowering.patch
deleted file mode 100644
index 917c513d..00000000
--- a/llvm_patches/3_8_r259342-AVX-512-SETCC-lowering.patch
+++ /dev/null
@@ -1,123 +0,0 @@
-Index: test/CodeGen/X86/setcc-lowering.ll
-===================================================================
---- test/CodeGen/X86/setcc-lowering.ll	(revision 259341)
-+++ test/CodeGen/X86/setcc-lowering.ll	(revision 259342)
-@@ -1,26 +1,28 @@
- ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
--; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+avx < %s | FileCheck %s
-+; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+avx < %s | FileCheck %s --check-prefix=AVX
-+; RUN: llc -mtriple=i386-unknown-linux-gnu -mcpu=knl < %s   | FileCheck %s --check-prefix=KNL-32
- 
-+
- ; Verify that we don't crash during codegen due to a wrong lowering
- ; of a setcc node with illegal operand types and return type.
- 
- define <8 x i16> @pr25080(<8 x i32> %a) {
--; CHECK-LABEL: pr25080:
--; CHECK:       # BB#0: # %entry
--; CHECK-NEXT:    vandps {{.*}}(%rip), %ymm0, %ymm0
--; CHECK-NEXT:    vextractf128 $1, %ymm0, %xmm1
--; CHECK-NEXT:    vpxor %xmm2, %xmm2, %xmm2
--; CHECK-NEXT:    vpcmpeqd %xmm2, %xmm1, %xmm1
--; CHECK-NEXT:    vmovdqa {{.*#+}} xmm3 = [0,1,4,5,8,9,12,13,8,9,12,13,12,13,14,15]
--; CHECK-NEXT:    vpshufb %xmm3, %xmm1, %xmm1
--; CHECK-NEXT:    vpcmpeqd %xmm2, %xmm0, %xmm0
--; CHECK-NEXT:    vpshufb %xmm3, %xmm0, %xmm0
--; CHECK-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
--; CHECK-NEXT:    vpor {{.*}}(%rip), %xmm0, %xmm0
--; CHECK-NEXT:    vpsllw $15, %xmm0, %xmm0
--; CHECK-NEXT:    vpsraw $15, %xmm0, %xmm0
--; CHECK-NEXT:    vzeroupper
--; CHECK-NEXT:    retq
-+; AVX-LABEL: pr25080:
-+; AVX:       # BB#0: # %entry
-+; AVX-NEXT:    vandps {{.*}}(%rip), %ymm0, %ymm0
-+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
-+; AVX-NEXT:    vpxor %xmm2, %xmm2, %xmm2
-+; AVX-NEXT:    vpcmpeqd %xmm2, %xmm1, %xmm1
-+; AVX-NEXT:    vmovdqa {{.*#+}} xmm3 = [0,1,4,5,8,9,12,13,8,9,12,13,12,13,14,15]
-+; AVX-NEXT:    vpshufb %xmm3, %xmm1, %xmm1
-+; AVX-NEXT:    vpcmpeqd %xmm2, %xmm0, %xmm0
-+; AVX-NEXT:    vpshufb %xmm3, %xmm0, %xmm0
-+; AVX-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-+; AVX-NEXT:    vpor {{.*}}(%rip), %xmm0, %xmm0
-+; AVX-NEXT:    vpsllw $15, %xmm0, %xmm0
-+; AVX-NEXT:    vpsraw $15, %xmm0, %xmm0
-+; AVX-NEXT:    vzeroupper
-+; AVX-NEXT:    retq
- entry:
-   %0 = trunc <8 x i32> %a to <8 x i23>
-   %1 = icmp eq <8 x i23> %0, zeroinitializer
-@@ -28,3 +30,46 @@
-   %3 = sext <8 x i1> %2 to <8 x i16>
-   ret <8 x i16> %3
- }
-+
-+define void @pr26232(i64 %a) {
-+; KNL-32-LABEL: pr26232:
-+; KNL-32:       # BB#0: # %for_test11.preheader
-+; KNL-32-NEXT:    pushl %esi
-+; KNL-32-NEXT:  .Ltmp0:
-+; KNL-32-NEXT:    .cfi_def_cfa_offset 8
-+; KNL-32-NEXT:  .Ltmp1:
-+; KNL-32-NEXT:    .cfi_offset %esi, -8
-+; KNL-32-NEXT:    movl {{[0-9]+}}(%esp), %eax
-+; KNL-32-NEXT:    movl {{[0-9]+}}(%esp), %ecx
-+; KNL-32-NEXT:    movw $-1, %dx
-+; KNL-32-NEXT:    .p2align 4, 0x90
-+; KNL-32-NEXT:  .LBB1_1: # %for_loop599
-+; KNL-32-NEXT:    # =>This Inner Loop Header: Depth=1
-+; KNL-32-NEXT:    cmpl $65536, %ecx # imm = 0x10000
-+; KNL-32-NEXT:    movl %eax, %esi
-+; KNL-32-NEXT:    sbbl $0, %esi
-+; KNL-32-NEXT:    movl $0, %esi
-+; KNL-32-NEXT:    cmovlw %dx, %si
-+; KNL-32-NEXT:    testw %si, %si
-+; KNL-32-NEXT:    jne .LBB1_1
-+; KNL-32-NEXT:  # BB#2: # %for_exit600
-+; KNL-32-NEXT:    popl %esi
-+; KNL-32-NEXT:    retl
-+allocas:
-+  br label %for_test11.preheader
-+
-+for_test11.preheader:                             ; preds = %for_test11.preheader, %allocas
-+  br i1 undef, label %for_loop599, label %for_test11.preheader
-+
-+for_loop599:                                      ; preds = %for_loop599, %for_test11.preheader
-+  %less_i_load605_ = icmp slt i64 %a, 65536
-+  %less_i_load605__broadcast_init = insertelement <16 x i1> undef, i1 %less_i_load605_, i32 0
-+  %less_i_load605__broadcast = shufflevector <16 x i1> %less_i_load605__broadcast_init, <16 x i1> undef, <16 x i32> zeroinitializer
-+  %"oldMask&test607" = and <16 x i1> %less_i_load605__broadcast, undef
-+  %intmask.i894 = bitcast <16 x i1> %"oldMask&test607" to i16
-+  %res.i895 = icmp eq i16 %intmask.i894, 0
-+  br i1 %res.i895, label %for_exit600, label %for_loop599
-+
-+for_exit600:                                      ; preds = %for_loop599
-+  ret void
-+}
-Index: lib/Target/X86/X86ISelLowering.cpp
-===================================================================
---- lib/Target/X86/X86ISelLowering.cpp	(revision 259341)
-+++ lib/Target/X86/X86ISelLowering.cpp	(revision 259342)
-@@ -1335,6 +1335,7 @@
- 
-     setOperationAction(ISD::BR_CC,              MVT::i1,    Expand);
-     setOperationAction(ISD::SETCC,              MVT::i1,    Custom);
-+    setOperationAction(ISD::SETCCE,             MVT::i1,    Custom);
-     setOperationAction(ISD::SELECT_CC,          MVT::i1,    Expand);
-     setOperationAction(ISD::XOR,                MVT::i1,    Legal);
-     setOperationAction(ISD::OR,                 MVT::i1,    Legal);
-@@ -15143,8 +15144,11 @@
-   assert(Carry.getOpcode() != ISD::CARRY_FALSE);
-   SDVTList VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
-   SDValue Cmp = DAG.getNode(X86ISD::SBB, DL, VTs, LHS, RHS, Carry);
--  return DAG.getNode(X86ISD::SETCC, DL, Op.getValueType(),
--                     DAG.getConstant(CC, DL, MVT::i8), Cmp.getValue(1));
-+  SDValue SetCC = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
-+                              DAG.getConstant(CC, DL, MVT::i8), Cmp.getValue(1));
-+  if (Op.getSimpleValueType() == MVT::i1)
-+      return DAG.getNode(ISD::TRUNCATE, DL, MVT::i1, SetCC);
-+  return SetCC;
- }
- 
- // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.