--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
+
+define i32 @negate_nuw(i32 %x) {
+; CHECK-LABEL: negate_nuw:
+; CHECK: # BB#0:
+; CHECK-NEXT: negl %edi
+; CHECK-NEXT: movl %edi, %eax
+; CHECK-NEXT: retq
+;
+ %neg = sub nuw i32 0, %x
+ ret i32 %neg
+}
+
+define <4 x i32> @negate_nuw_vec(<4 x i32> %x) {
+; CHECK-LABEL: negate_nuw_vec:
+; CHECK: # BB#0:
+; CHECK-NEXT: pxor %xmm1, %xmm1
+; CHECK-NEXT: psubd %xmm0, %xmm1
+; CHECK-NEXT: movdqa %xmm1, %xmm0
+; CHECK-NEXT: retq
+;
+ %neg = sub nuw <4 x i32> zeroinitializer, %x
+ ret <4 x i32> %neg
+}
+
+define i8 @negate_zero_or_minsigned_nsw(i8 %x) {
+; CHECK-LABEL: negate_zero_or_minsigned_nsw:
+; CHECK: # BB#0:
+; CHECK-NEXT: andb $-128, %dil
+; CHECK-NEXT: negb %dil
+; CHECK-NEXT: movl %edi, %eax
+; CHECK-NEXT: retq
+;
+ %signbit = and i8 %x, 128
+ %neg = sub nsw i8 0, %signbit
+ ret i8 %neg
+}
+
+define <4 x i32> @negate_zero_or_minsigned_nsw_vec(<4 x i32> %x) {
+; CHECK-LABEL: negate_zero_or_minsigned_nsw_vec:
+; CHECK: # BB#0:
+; CHECK-NEXT: pslld $31, %xmm0
+; CHECK-NEXT: pxor %xmm1, %xmm1
+; CHECK-NEXT: psubd %xmm0, %xmm1
+; CHECK-NEXT: movdqa %xmm1, %xmm0
+; CHECK-NEXT: retq
+;
+ %signbit = shl <4 x i32> %x, <i32 31, i32 31, i32 31, i32 31>
+ %neg = sub nsw <4 x i32> zeroinitializer, %signbit
+ ret <4 x i32> %neg
+}
+
+define i8 @negate_zero_or_minsigned(i8 %x) {
+; CHECK-LABEL: negate_zero_or_minsigned:
+; CHECK: # BB#0:
+; CHECK-NEXT: shlb $7, %dil
+; CHECK-NEXT: negb %dil
+; CHECK-NEXT: movl %edi, %eax
+; CHECK-NEXT: retq
+;
+ %signbit = shl i8 %x, 7
+ %neg = sub i8 0, %signbit
+ ret i8 %neg
+}
+
+define <4 x i32> @negate_zero_or_minsigned_vec(<4 x i32> %x) {
+; CHECK-LABEL: negate_zero_or_minsigned_vec:
+; CHECK: # BB#0:
+; CHECK-NEXT: pand {{.*}}(%rip), %xmm0
+; CHECK-NEXT: pxor %xmm1, %xmm1
+; CHECK-NEXT: psubd %xmm0, %xmm1
+; CHECK-NEXT: movdqa %xmm1, %xmm0
+; CHECK-NEXT: retq
+;
+ %signbit = and <4 x i32> %x, <i32 2147483648, i32 2147483648, i32 2147483648, i32 2147483648>
+ %neg = sub <4 x i32> zeroinitializer, %signbit
+ ret <4 x i32> %neg
+}
+