[InstSimplify] Add test cases for missing fold (A & B) | ~(A ^ B) -> ~(A ^ B).
llvm-svn: 303367
diff --git a/llvm/test/Transforms/InstSimplify/AndOrXor.ll b/llvm/test/Transforms/InstSimplify/AndOrXor.ll
index a9b4e4e..2d7eeae 100644
--- a/llvm/test/Transforms/InstSimplify/AndOrXor.ll
+++ b/llvm/test/Transforms/InstSimplify/AndOrXor.ll
@@ -735,6 +735,74 @@
ret i32 %or
}
+; (A & B) | ~(A ^ B) -> ~(A ^ B)
+
+define i32 @test55(i32 %a, i32 %b) {
+; CHECK-LABEL: @test55(
+; CHECK-NEXT: [[AND:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[A]], [[B]]
+; CHECK-NEXT: [[XNOR:%.*]] = xor i32 [[XOR]], -1
+; CHECK-NEXT: [[OR:%.*]] = or i32 [[AND]], [[XNOR]]
+; CHECK-NEXT: ret i32 [[OR]]
+;
+ %and = and i32 %a, %b
+ %xor = xor i32 %a, %b
+ %xnor = xor i32 %xor, -1
+ %or = or i32 %and, %xnor
+ ret i32 %or
+}
+
+; ~(A ^ B) | (A & B) -> ~(A ^ B)
+
+define i32 @test56(i32 %a, i32 %b) {
+; CHECK-LABEL: @test56(
+; CHECK-NEXT: [[AND:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[A]], [[B]]
+; CHECK-NEXT: [[XNOR:%.*]] = xor i32 [[XOR]], -1
+; CHECK-NEXT: [[OR:%.*]] = or i32 [[XNOR]], [[AND]]
+; CHECK-NEXT: ret i32 [[OR]]
+;
+ %and = and i32 %a, %b
+ %xor = xor i32 %a, %b
+ %xnor = xor i32 %xor, -1
+ %or = or i32 %xnor, %and
+ ret i32 %or
+}
+
+; (B & A) | ~(A ^ B) -> ~(A ^ B)
+
+define i32 @test57(i32 %a, i32 %b) {
+; CHECK-LABEL: @test57(
+; CHECK-NEXT: [[AND:%.*]] = and i32 [[B:%.*]], [[A:%.*]]
+; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[A]], [[B]]
+; CHECK-NEXT: [[XNOR:%.*]] = xor i32 [[XOR]], -1
+; CHECK-NEXT: [[OR:%.*]] = or i32 [[AND]], [[XNOR]]
+; CHECK-NEXT: ret i32 [[OR]]
+;
+ %and = and i32 %b, %a
+ %xor = xor i32 %a, %b
+ %xnor = xor i32 %xor, -1
+ %or = or i32 %and, %xnor
+ ret i32 %or
+}
+
+; ~(A ^ B) | (A & B) -> ~(A ^ B)
+
+define i32 @test58(i32 %a, i32 %b) {
+; CHECK-LABEL: @test58(
+; CHECK-NEXT: [[AND:%.*]] = and i32 [[B:%.*]], [[A:%.*]]
+; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[A]], [[B]]
+; CHECK-NEXT: [[XNOR:%.*]] = xor i32 [[XOR]], -1
+; CHECK-NEXT: [[OR:%.*]] = or i32 [[XNOR]], [[AND]]
+; CHECK-NEXT: ret i32 [[OR]]
+;
+ %and = and i32 %b, %a
+ %xor = xor i32 %a, %b
+ %xnor = xor i32 %xor, -1
+ %or = or i32 %xnor, %and
+ ret i32 %or
+}
+
define i8 @lshr_perfect_mask(i8 %x) {
; CHECK-LABEL: @lshr_perfect_mask(
; CHECK-NEXT: [[SH:%.*]] = lshr i8 %x, 5