InstCombine: Don't assume that m_ZExt matches an Instruction

[oota-llvm.git] / test / Transforms / InstCombine / xor2.ll

diff --git a/test/Transforms/InstCombine/xor2.ll b/test/Transforms/InstCombine/xor2.ll
index d153e035c8996abc08de1826513672cd5e78a070..797c8f39f2985d46f7f60978dd7f522b4b7b062c 100644 (file)
--- a/test/Transforms/InstCombine/xor2.ll
+++ b/test/Transforms/InstCombine/xor2.ll
@@ -82,3 +82,93 @@ define i32 @test6(i32 %x) {
 ; 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]]
+}