ret <2 x i8> %and
}
+define <2 x i8> @and1_shl1_is_cmp_eq_0_vec_undef(<2 x i8> %x) {
+; CHECK-LABEL: @and1_shl1_is_cmp_eq_0_vec_undef(
+; CHECK-NEXT: [[SH:%.*]] = shl <2 x i8> <i8 1, i8 undef>, [[X:%.*]]
+; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[SH]], <i8 1, i8 undef>
+; CHECK-NEXT: ret <2 x i8> [[AND]]
+;
+ %sh = shl <2 x i8> <i8 1, i8 undef>, %x
+ %and = and <2 x i8> %sh, <i8 1, i8 undef>
+ ret <2 x i8> %and
+}
+
; (1 >> x) & 1 --> zext(x == 0)
define i8 @and1_lshr1_is_cmp_eq_0(i8 %x) {
ret <2 x i8> %and
}
+define <2 x i8> @and1_lshr1_is_cmp_eq_0_vec_undef(<2 x i8> %x) {
+; CHECK-LABEL: @and1_lshr1_is_cmp_eq_0_vec_undef(
+; CHECK-NEXT: [[SH:%.*]] = lshr <2 x i8> <i8 1, i8 undef>, [[X:%.*]]
+; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[SH]], <i8 1, i8 undef>
+; CHECK-NEXT: ret <2 x i8> [[AND]]
+;
+ %sh = lshr <2 x i8> <i8 1, i8 undef>, %x
+ %and = and <2 x i8> %sh, <i8 1, i8 undef>
+ ret <2 x i8> %and
+}
+
; The add in this test is unnecessary because the LSBs of the LHS are 0 and the 'and' only consumes bits from those LSBs. It doesn't matter what happens to the upper bits.
define i32 @test11(i32 %a, i32 %b) {
; CHECK-LABEL: @test11(