; PR1253
define i1 @test0(i32 %A) {
-; CHECK: @test0
+; CHECK-LABEL: @test0(
; CHECK: %C = icmp slt i32 %A, 0
%B = xor i32 %A, -2147483648
%C = icmp sgt i32 %B, -1
}
define i1 @test1(i32 %A) {
-; CHECK: @test1
+; CHECK-LABEL: @test1(
; CHECK: %C = icmp slt i32 %A, 0
%B = xor i32 %A, 12345
%C = icmp slt i32 %B, 0
; PR1014
define i32 @test2(i32 %tmp1) {
-; CHECK: @test2
+; CHECK-LABEL: @test2(
; CHECK-NEXT: and i32 %tmp1, 32
; CHECK-NEXT: or i32 %ovm, 8
; CHECK-NEXT: ret i32
}
define i32 @test3(i32 %tmp1) {
-; CHECK: @test3
+; CHECK-LABEL: @test3(
; CHECK-NEXT: and i32 %tmp1, 32
-; CHECK-NEXT: or i32 %tmp, 8
+; CHECK-NEXT: or i32 %ovm, 8
; CHECK-NEXT: ret i32
%ovm = or i32 %tmp1, 145
%ov31 = and i32 %ovm, 177
%2 = ashr i32 %1, %B
%3 = xor i32 %2, -1
ret i32 %3
-; CHECK: @test4
+; CHECK-LABEL: @test4(
; CHECK: %1 = ashr i32 %A, %B
; CHECK: ret i32 %1
}
+
+; defect-2 in rdar://12329730
+; (X^C1) >> C2) ^ C3 -> (X>>C2) ^ ((C1>>C2)^C3)
+; where the "X" has more than one use
+define i32 @test5(i32 %val1) {
+test5:
+ %xor = xor i32 %val1, 1234
+ %shr = lshr i32 %xor, 8
+ %xor1 = xor i32 %shr, 1
+ %add = add i32 %xor1, %xor
+ ret i32 %add
+; CHECK-LABEL: @test5(
+; CHECK: lshr i32 %val1, 8
+; CHECK: ret
+}
+
+; defect-1 in rdar://12329730
+; Simplify (X^Y) -> X or Y in the user's context if we know that
+; only bits from X or Y are demanded.
+; e.g. the "x ^ 1234" can be optimized into x in the context of "t >> 16".
+; Put in other word, t >> 16 -> x >> 16.
+; unsigned foo(unsigned x) { unsigned t = x ^ 1234; ; return (t >> 16) + t;}
+define i32 @test6(i32 %x) {
+ %xor = xor i32 %x, 1234
+ %shr = lshr i32 %xor, 16
+ %add = add i32 %shr, %xor
+ ret i32 %add
+; CHECK-LABEL: @test6(
+; CHECK: lshr i32 %x, 16
+; CHECK: ret
+}
+
+
+; (A | B) ^ (~A) -> (A | ~B)
+define i32 @test7(i32 %a, i32 %b) {
+ %or = or i32 %a, %b
+ %neg = xor i32 %a, -1
+ %xor = xor i32 %or, %neg
+ ret i32 %xor
+; CHECK-LABEL: @test7(
+; CHECK-NEXT: %[[b_not:.*]] = xor i32 %b, -1
+; CHECK-NEXT: %[[or:.*]] = or i32 %a, %[[b_not]]
+; CHECK-NEXT: ret i32 %[[or]]
+}
+
+; (~A) ^ (A | B) -> (A | ~B)
+define i32 @test8(i32 %a, i32 %b) {
+ %neg = xor i32 %a, -1
+ %or = or i32 %a, %b
+ %xor = xor i32 %neg, %or
+ ret i32 %xor
+; CHECK-LABEL: @test8(
+; CHECK-NEXT: %[[b_not:.*]] = xor i32 %b, -1
+; CHECK-NEXT: %[[or:.*]] = or i32 %a, %[[b_not]]
+; CHECK-NEXT: ret i32 %[[or]]
+}
+
+; (A & B) ^ (A ^ B) -> (A | B)
+define i32 @test9(i32 %b, i32 %c) {
+ %and = and i32 %b, %c
+ %xor = xor i32 %b, %c
+ %xor2 = xor i32 %and, %xor
+ ret i32 %xor2
+; CHECK-LABEL: @test9(
+; CHECK-NEXT: %xor2 = or i32 %b, %c
+}
+
+; (A ^ B) ^ (A & B) -> (A | B)
+define i32 @test10(i32 %b, i32 %c) {
+ %xor = xor i32 %b, %c
+ %and = and i32 %b, %c
+ %xor2 = xor i32 %xor, %and
+ ret i32 %xor2
+; CHECK-LABEL: @test10(
+; CHECK-NEXT: %xor2 = or i32 %b, %c
+}
+
+define i32 @test11(i32 %A, i32 %B) {
+ %xor1 = xor i32 %B, %A
+ %not = xor i32 %A, -1
+ %xor2 = xor i32 %not, %B
+ %and = and i32 %xor1, %xor2
+ ret i32 %and
+; CHECK-LABEL: @test11(
+; CHECK-NEXT: ret i32 0
+}
+
+define i32 @test12(i32 %a, i32 %b) {
+ %negb = xor i32 %b, -1
+ %and = and i32 %a, %negb
+ %nega = xor i32 %a, -1
+ %xor = xor i32 %and, %nega
+ ret i32 %xor
+; CHECK-LABEL: @test12(
+; CHECK-NEXT: %1 = and i32 %a, %b
+; CHECK-NEXT: %xor = xor i32 %1, -1
+}
+
+define i32 @test13(i32 %a, i32 %b) {
+ %nega = xor i32 %a, -1
+ %negb = xor i32 %b, -1
+ %and = and i32 %a, %negb
+ %xor = xor i32 %nega, %and
+ ret i32 %xor
+; CHECK-LABEL: @test13(
+; CHECK-NEXT: %1 = and i32 %a, %b
+; CHECK-NEXT: %xor = xor i32 %1, -1
+}
+
+; (A ^ C) ^ (A | B) -> ((~A) & B) ^ C
+define i32 @test14(i32 %a, i32 %b, i32 %c) {
+ %neg = xor i32 %a, %c
+ %or = or i32 %a, %b
+ %xor = xor i32 %neg, %or
+ ret i32 %xor
+; CHECK-LABEL: @test14(
+; CHECK-NEXT: %[[not:.*]] = xor i32 %a, -1
+; CHECK-NEXT: %[[and:.*]] = and i32 %[[not]], %b
+; CHECK-NEXT: %[[xor:.*]] = xor i32 %[[and]], %c
+; CHECK-NEXT: ret i32 %[[xor]]
+}