[tests] precommit tests for D149229

[nikic]

LGTM

llvm/test/Transforms/InstSimplify/select_or_and.ll

 ; CHECK-NEXT:    ret i32 [[COND]]
 ;
   %and = and i32 %a, %b
   %tobool = icmp eq i32 %and, -1
   %cond = select i1 %tobool, i32 %a, i32 -1
   ret i32 %cond
 }
 
+define i32 @select_icmp_and_eq_commuted(i32 %a, i32 %b) {
+; CHECK-LABEL: @select_icmp_and_eq_commuted(
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq i32 [[AND]], -1
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], i32 [[B]], i32 -1
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %and = and i32 %a, %b
+  %tobool = icmp eq i32 %and, -1
+  %cond = select i1 %tobool, i32 %b, i32 -1
+  ret i32 %cond
+}
+
+; https://alive2.llvm.org/ce/z/HfYXvx
+define <2 x i16> @select_icmp_and_eq_vec(<2 x i16> %a, <2 x i16> %b) {
+; CHECK-LABEL: @select_icmp_and_eq_vec(
+; CHECK-NEXT:    [[AND:%.*]] = and <2 x i16> [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq <2 x i16> [[AND]], <i16 -1, i16 -1>
+; CHECK-NEXT:    [[COND:%.*]] = select <2 x i1> [[TOBOOL]], <2 x i16> [[A]], <2 x i16> <i16 -1, i16 -1>
+; CHECK-NEXT:    ret <2 x i16> [[COND]]
+;
+  %and = and <2 x i16> %a, %b
+  %tobool = icmp eq <2 x i16> %and, <i16 -1, i16 -1>
+  %cond = select <2 x i1> %tobool, <2 x i16> %a, <2 x i16> <i16 -1, i16 -1>
+  ret <2 x i16> %cond
+}
+
+; The ne should also be macthed
+define i32 @select_icmp_and_ne(i32 %a, i32 %b) {
+; CHECK-LABEL: @select_icmp_and_ne(
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp ne i32 [[AND]], -1
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], i32 -1, i32 [[A]]
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %and = and i32 %a, %b
+  %tobool = icmp ne i32 %and, -1
+  %cond = select i1 %tobool, i32 -1, i32 %a
+  ret i32 %cond
+}
+
+; Negative test: Incorrect const value for icmp
+define i32 @select_icmp_and_eq_incorrect_const(i32 %a, i32 %b) {
+; CHECK-LABEL: @select_icmp_and_eq_incorrect_const(
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq i32 [[AND]], 0
+; CHECK-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], i32 [[A]], i32 -1
+; CHECK-NEXT:    ret i32 [[COND]]
+;
+  %and = and i32 %a, %b
+  %tobool = icmp eq i32 %and, 0  ; Incorrect const value
+  %cond = select i1 %tobool, i32 %a, i32 -1
+  ret i32 %cond
+}
+
 ; https://alive2.llvm.org/ce/z/hSyCuR
 define i32 @select_icmp_or_eq(i32 %a, i32 %b) {
 ; CHECK-LABEL: @select_icmp_or_eq(
 ; CHECK-NEXT:    ret i32 0
 ;
   %or = or i32 %a, %b
   %tobool = icmp eq i32 %or, 0
   %cond = select i1 %tobool, i32 %a, i32 0