Revert "Temporarily Revert "Add basic loop fusion pass.""

The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552

1 files changed, 1346 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstCombine/abs_abs.ll b/llvm/test/Transforms/InstCombine/abs_abs.ll
new file mode 100644
index 00000000000..207ceb5215a
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/abs_abs.ll
@@ -0,0 +1,1346 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+define i32 @abs_abs_x01(i32 %x) {
+; CHECK-LABEL: @abs_abs_x01(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define <2 x i32> @abs_abs_x01_vec(<2 x i32> %x) {
+; CHECK-LABEL: @abs_abs_x01_vec(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[X:%.*]], zeroinitializer
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i32> zeroinitializer, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[SUB]], <2 x i32> [[X]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %cmp = icmp sgt <2 x i32> %x, <i32 -1, i32 -1>
+  %sub = sub nsw <2 x i32> zeroinitializer, %x
+  %cond = select <2 x i1> %cmp, <2 x i32> %x, <2 x i32> %sub
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %cond, <2 x i32> %sub16
+  ret <2 x i32> %cond18
+}
+
+define i32 @abs_abs_x02(i32 %x) {
+; CHECK-LABEL: @abs_abs_x02(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x03(i32 %x) {
+; CHECK-LABEL: @abs_abs_x03(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x04(i32 %x) {
+; CHECK-LABEL: @abs_abs_x04(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define <2 x i32> @abs_abs_x04_vec(<2 x i32> %x) {
+; CHECK-LABEL: @abs_abs_x04_vec(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[X:%.*]], zeroinitializer
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i32> zeroinitializer, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[SUB]], <2 x i32> [[X]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %cmp = icmp slt <2 x i32> %x, <i32 1, i32 1>
+  %sub = sub nsw <2 x i32> zeroinitializer, %x
+  %cond = select <2 x i1> %cmp, <2 x i32> %sub, <2 x i32> %x
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %cond, <2 x i32> %sub16
+  ret <2 x i32> %cond18
+}
+
+define i32 @abs_abs_x05(i32 %x) {
+; CHECK-LABEL: @abs_abs_x05(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x06(i32 %x) {
+; CHECK-LABEL: @abs_abs_x06(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x07(i32 %x) {
+; CHECK-LABEL: @abs_abs_x07(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x08(i32 %x) {
+; CHECK-LABEL: @abs_abs_x08(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x09(i32 %x) {
+; CHECK-LABEL: @abs_abs_x09(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x10(i32 %x) {
+; CHECK-LABEL: @abs_abs_x10(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x11(i32 %x) {
+; CHECK-LABEL: @abs_abs_x11(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x12(i32 %x) {
+; CHECK-LABEL: @abs_abs_x12(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x13(i32 %x) {
+; CHECK-LABEL: @abs_abs_x13(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x14(i32 %x) {
+; CHECK-LABEL: @abs_abs_x14(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x15(i32 %x) {
+; CHECK-LABEL: @abs_abs_x15(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_abs_x16(i32 %x) {
+; CHECK-LABEL: @abs_abs_x16(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+; abs(abs(-x)) -> abs(-x) -> abs(x)
+define i32 @abs_abs_x17(i32 %x) {
+; CHECK-LABEL: @abs_abs_x17(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X]], 0
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %sub = sub nsw i32 0, %x
+  %cmp = icmp sgt i32 %sub, -1
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+; abs(abs(x - y)) -> abs(x - y)
+define i32 @abs_abs_x18(i32 %x, i32 %y) {
+; CHECK-LABEL: @abs_abs_x18(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], 0
+; CHECK-NEXT:    [[NEGA:%.*]] = sub i32 0, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[NEGA]], i32 [[A]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %a = sub nsw i32 %x, %y
+  %b = sub nsw i32 %y, %x
+  %cmp = icmp sgt i32 %a, -1
+  %cond = select i1 %cmp, i32 %a, i32 %b
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+; abs(abs(-x)) -> abs(-x) -> abs(x)
+define <2 x i32> @abs_abs_x02_vec(<2 x i32> %x) {
+; CHECK-LABEL: @abs_abs_x02_vec(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i32> zeroinitializer, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[X]], zeroinitializer
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[SUB]], <2 x i32> [[X]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %sub = sub nsw <2 x i32> zeroinitializer, %x
+  %cmp = icmp sgt <2 x i32> %sub, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %sub, <2 x i32> %x
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %cond, <2 x i32> %sub16
+  ret <2 x i32> %cond18
+}
+
+; abs(abs(x - y)) -> abs(x - y)
+define <2 x i32> @abs_abs_x03_vec(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @abs_abs_x03_vec(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw <2 x i32> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[A]], zeroinitializer
+; CHECK-NEXT:    [[NEGA:%.*]] = sub <2 x i32> zeroinitializer, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[NEGA]], <2 x i32> [[A]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %a = sub nsw <2 x i32> %x, %y
+  %b = sub nsw <2 x i32> %y, %x
+  %cmp = icmp sgt <2 x i32> %a, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %a, <2 x i32> %b
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %cond, <2 x i32> %sub16
+  ret <2 x i32> %cond18
+}
+
+define i32 @nabs_nabs_x01(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x01(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x02(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x02(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x03(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x03(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x04(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x04(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x05(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x05(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x06(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x06(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x07(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x07(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x08(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x08(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x09(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x09(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x10(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x10(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x11(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x11(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x12(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x12(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x13(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x13(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x14(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x14(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x15(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x15(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_nabs_x16(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x16(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+; nabs(nabs(-x)) -> nabs(-x) -> nabs(x)
+define i32 @nabs_nabs_x17(i32 %x) {
+; CHECK-LABEL: @nabs_nabs_x17(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X]], 0
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %sub = sub nsw i32 0, %x
+  %cmp = icmp sgt i32 %sub, -1
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub16, i32 %cond
+  ret i32 %cond18
+}
+
+; nabs(nabs(x - y)) -> nabs(x - y)
+define i32 @nabs_nabs_x18(i32 %x, i32 %y) {
+; CHECK-LABEL: @nabs_nabs_x18(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], 0
+; CHECK-NEXT:    [[NEGA:%.*]] = sub i32 0, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[A]], i32 [[NEGA]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %a = sub nsw i32 %x, %y
+  %b = sub nsw i32 %y, %x
+  %cmp = icmp sgt i32 %a, -1
+  %cond = select i1 %cmp, i32 %b, i32 %a
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub16, i32 %cond
+  ret i32 %cond18
+}
+
+; nabs(nabs(-x)) -> nabs(-x) -> nabs(x)
+define <2 x i32> @nabs_nabs_x01_vec(<2 x i32> %x) {
+; CHECK-LABEL: @nabs_nabs_x01_vec(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i32> zeroinitializer, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[X]], zeroinitializer
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[X]], <2 x i32> [[SUB]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %sub = sub nsw <2 x i32> zeroinitializer, %x
+  %cmp = icmp sgt <2 x i32> %sub, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %x, <2 x i32> %sub
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %sub16, <2 x i32> %cond
+  ret <2 x i32> %cond18
+}
+
+; nabs(nabs(x - y)) -> nabs(x - y)
+define <2 x i32> @nabs_nabs_x02_vec(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @nabs_nabs_x02_vec(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw <2 x i32> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[A]], zeroinitializer
+; CHECK-NEXT:    [[NEGA:%.*]] = sub <2 x i32> zeroinitializer, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[A]], <2 x i32> [[NEGA]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %a = sub nsw <2 x i32> %x, %y
+  %b = sub nsw <2 x i32> %y, %x
+  %cmp = icmp sgt <2 x i32> %a, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %b, <2 x i32> %a
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %sub16, <2 x i32> %cond
+  ret <2 x i32> %cond18
+}
+
+define i32 @abs_nabs_x01(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x01(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x02(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x02(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x03(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x03(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x04(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x04(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x05(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x05(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x06(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x06(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x07(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x07(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x08(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x08(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x09(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x09(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x10(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x10(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x11(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x11(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x12(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x12(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x13(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x13(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x14(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x14(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x15(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x15(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @abs_nabs_x16(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x16(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+; abs(nabs(-x)) -> abs(-x) -> abs(x)
+define i32 @abs_nabs_x17(i32 %x) {
+; CHECK-LABEL: @abs_nabs_x17(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X]], 0
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 [[X]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %sub = sub nsw i32 0, %x
+  %cmp = icmp sgt i32 %sub, -1
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+; abs(nabs(x - y)) -> abs(x - y)
+define i32 @abs_nabs_x18(i32 %x, i32 %y) {
+; CHECK-LABEL: @abs_nabs_x18(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], 0
+; CHECK-NEXT:    [[NEGA:%.*]] = sub i32 0, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[NEGA]], i32 [[A]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %a = sub nsw i32 %x, %y
+  %b = sub nsw i32 %y, %x
+  %cmp = icmp sgt i32 %a, -1
+  %cond = select i1 %cmp, i32 %b, i32 %a
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+; abs(nabs(-x)) -> abs(-x) -> abs(x)
+define <2 x i32> @abs_nabs_x01_vec(<2 x i32> %x) {
+; CHECK-LABEL: @abs_nabs_x01_vec(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i32> zeroinitializer, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[X]], zeroinitializer
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[SUB]], <2 x i32> [[X]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %sub = sub nsw <2 x i32> zeroinitializer, %x
+  %cmp = icmp sgt <2 x i32> %sub, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %x, <2 x i32> %sub
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %cond, <2 x i32> %sub16
+  ret <2 x i32> %cond18
+}
+
+; abs(nabs(x - y)) -> abs(x - y)
+define <2 x i32> @abs_nabs_x02_vec(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @abs_nabs_x02_vec(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw <2 x i32> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[A]], zeroinitializer
+; CHECK-NEXT:    [[NEGA:%.*]] = sub <2 x i32> zeroinitializer, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[NEGA]], <2 x i32> [[A]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %a = sub nsw <2 x i32> %x, %y
+  %b = sub nsw <2 x i32> %y, %x
+  %cmp = icmp sgt <2 x i32> %a, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %b, <2 x i32> %a
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %cond, <2 x i32> %sub16
+  ret <2 x i32> %cond18
+}
+
+define i32 @nabs_abs_x01(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x01(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x02(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x02(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x03(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x03(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x04(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x04(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x05(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x05(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x06(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x06(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x07(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x07(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x08(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x08(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, 0
+  %sub9 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub9, i32 %cond
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x09(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x09(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x10(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x10(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x11(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x11(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x12(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x12(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 0
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x13(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x13(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, -1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x14(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x14(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp sgt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %x, i32 %sub
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x15(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x15(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 0
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+define i32 @nabs_abs_x16(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x16(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 0
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X]]
+; CHECK-NEXT:    [[COND1:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND1]]
+;
+  %cmp = icmp slt i32 %x, 1
+  %sub = sub nsw i32 0, %x
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp slt i32 %cond, 1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %cond, i32 %sub16
+  ret i32 %cond18
+}
+
+; nabs(abs(-x)) -> nabs(-x) -> nabs(x)
+define i32 @nabs_abs_x17(i32 %x) {
+; CHECK-LABEL: @nabs_abs_x17(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 0, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[X]], 0
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[SUB]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %sub = sub nsw i32 0, %x
+  %cmp = icmp sgt i32 %sub, -1
+  %cond = select i1 %cmp, i32 %sub, i32 %x
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub16, i32 %cond
+  ret i32 %cond18
+}
+
+; nabs(abs(x - y)) -> nabs(x - y)
+define i32 @nabs_abs_x18(i32 %x, i32 %y) {
+; CHECK-LABEL: @nabs_abs_x18(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], 0
+; CHECK-NEXT:    [[NEGA:%.*]] = sub i32 0, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], i32 [[A]], i32 [[NEGA]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %a = sub nsw i32 %x, %y
+  %b = sub nsw i32 %y, %x
+  %cmp = icmp sgt i32 %a, -1
+  %cond = select i1 %cmp, i32 %a, i32 %b
+  %cmp1 = icmp sgt i32 %cond, -1
+  %sub16 = sub nsw i32 0, %cond
+  %cond18 = select i1 %cmp1, i32 %sub16, i32 %cond
+  ret i32 %cond18
+}
+
+; nabs(abs(-x)) -> nabs(-x) -> nabs(x)
+define <2 x i32> @nabs_abs_x01_vec(<2 x i32> %x) {
+; CHECK-LABEL: @nabs_abs_x01_vec(
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i32> zeroinitializer, [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[X]], zeroinitializer
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[X]], <2 x i32> [[SUB]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %sub = sub nsw <2 x i32> zeroinitializer, %x
+  %cmp = icmp sgt <2 x i32> %sub, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %sub, <2 x i32> %x
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %sub16, <2 x i32> %cond
+  ret <2 x i32> %cond18
+}
+
+; nabs(abs(x - y)) -> nabs(x - y)
+define <2 x i32> @nabs_abs_x02_vec(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @nabs_abs_x02_vec(
+; CHECK-NEXT:    [[A:%.*]] = sub nsw <2 x i32> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[A]], zeroinitializer
+; CHECK-NEXT:    [[NEGA:%.*]] = sub <2 x i32> zeroinitializer, [[A]]
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[A]], <2 x i32> [[NEGA]]
+; CHECK-NEXT:    ret <2 x i32> [[COND]]
+;
+  %a = sub nsw <2 x i32> %x, %y
+  %b = sub nsw <2 x i32> %y, %x
+  %cmp = icmp sgt <2 x i32> %a, <i32 -1, i32 -1>
+  %cond = select <2 x i1> %cmp, <2 x i32> %a, <2 x i32> %b
+  %cmp1 = icmp sgt <2 x i32> %cond, <i32 -1, i32 -1>
+  %sub16 = sub nsw <2 x i32> zeroinitializer, %cond
+  %cond18 = select <2 x i1> %cmp1, <2 x i32> %sub16, <2 x i32> %cond
+  ret <2 x i32> %cond18
+}