This removes TODO added in http://reviews.llvm.org/D3658

The patch transforms

ABS(NABS(X)) -> ABS(X)
NABS(ABS(X)) -> NABS(X)

Differential Revision: http://reviews.llvm.org/D4040



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210782 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 480 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/abs_abs.ll b/test/Transforms/InstCombine/abs_abs.ll
index f0b55884b4..de10fd180a 100644
--- a/test/Transforms/InstCombine/abs_abs.ll
+++ b/test/Transforms/InstCombine/abs_abs.ll
@@ -479,3 +479,483 @@ define i32 @nabs_nabs_x16(i32 %x) {
 ; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
 ; CHECK-NEXT: ret i32 [[SEL]]
 }
+
+define i32 @abs_nabs_x01(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x01(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x02(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x02(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x03(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x03(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x04(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x04(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x05(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x05(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x06(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x06(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x07(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x07(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x08(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x08(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x09(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x09(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x10(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x10(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x11(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x11(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x12(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x12(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x13(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x13(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x14(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x14(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x15(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x15(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @abs_nabs_x16(i32 %x) {
+  %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
+; CHECK-LABEL: @abs_nabs_x16(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x01(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x01(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x02(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x02(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x03(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x03(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x04(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x04(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x05(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x05(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x06(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x06(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x07(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x07(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x08(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x08(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x09(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x09(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x10(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x10(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x11(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x11(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x12(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x12(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x13(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x13(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, -1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x14(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x14(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp sgt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[NEG]], i32 %x
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x15(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x15(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 0
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
+
+define i32 @nabs_abs_x16(i32 %x) {
+  %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
+; CHECK-LABEL: @nabs_abs_x16(
+; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp slt i32 %x, 1
+; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub nsw i32 0, %x
+; CHECK-NEXT: [[SEL:%[a-z0-9]+]] = select i1 [[CMP]], i32 %x, i32 [[NEG]]
+; CHECK-NEXT: ret i32 [[SEL]]
+}
\ No newline at end of file