Teach ComputeNumSignBits about signed divisions.

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

diff --git a/test/Transforms/InstCombine/or-xor.ll b/test/Transforms/InstCombine/or-xor.ll
index cec36f119a9aef6e4131cd2ba9bab3dc2e93cdf5..546b777b4e6b81e10f3774419d4f4a694e2aedb9 100644 (file)
--- a/test/Transforms/InstCombine/or-xor.ll
+++ b/test/Transforms/InstCombine/or-xor.ll
@@ -92,3 +92,86 @@ define i32 @test9(i32 %x, i32 %y) nounwind {
 ; CHECK-NEXT: %z = or i32 %y.not, %x
 ; CHECK-NEXT: ret i32 %z
 }
+
+define i32 @test10(i32 %A, i32 %B) {
+  %xor1 = xor i32 %B, %A
+  %not = xor i32 %A, -1
+  %xor2 = xor i32 %not, %B
+  %or = or i32 %xor1, %xor2
+  ret i32 %or
+; CHECK-LABEL: @test10(
+; CHECK-NEXT: ret i32 -1
+}
+
+; (x | y) & ((~x) ^ y) -> (x & y)
+define i32 @test11(i32 %x, i32 %y) {
+ %or = or i32 %x, %y
+ %neg = xor i32 %x, -1
+ %xor = xor i32 %neg, %y
+ %and = and i32 %or, %xor
+ ret i32 %and
+; CHECK-LABEL: @test11(
+; CHECK-NEXT: %and = and i32 %x, %y
+; CHECK-NEXT: ret i32 %and
+}
+
+; ((~x) ^ y) & (x | y) -> (x & y)
+define i32 @test12(i32 %x, i32 %y) {
+ %neg = xor i32 %x, -1
+ %xor = xor i32 %neg, %y
+ %or = or i32 %x, %y
+ %and = and i32 %xor, %or
+ ret i32 %and
+; CHECK-LABEL: @test12(
+; CHECK-NEXT: %and = and i32 %x, %y
+; CHECK-NEXT: ret i32 %and
+}
+
+; ((x | y) ^ (x ^ y)) -> (x & y)
+define i32 @test13(i32 %x, i32 %y) {
+  %1 = xor i32 %y, %x
+  %2 = or i32 %y, %x
+  %3 = xor i32 %2, %1
+  ret i32 %3
+; CHECK-LABEL: @test13(
+; CHECK-NEXT: %1 = and i32 %y, %x
+; CHECK-NEXT: ret i32 %1
+}
+
+; ((x | ~y) ^ (~x | y)) -> x ^ y
+define i32 @test14(i32 %x, i32 %y) {
+  %noty = xor i32 %y, -1
+  %notx = xor i32 %x, -1
+  %or1 = or i32 %x, %noty
+  %or2 = or i32 %notx, %y
+  %xor = xor i32 %or1, %or2
+  ret i32 %xor
+; CHECK-LABEL: @test14(
+; CHECK-NEXT: %xor = xor i32 %x, %y
+; CHECK-NEXT: ret i32 %xor
+}
+
+; ((x & ~y) ^ (~x & y)) -> x ^ y
+define i32 @test15(i32 %x, i32 %y) {
+  %noty = xor i32 %y, -1
+  %notx = xor i32 %x, -1
+  %and1 = and i32 %x, %noty
+  %and2 = and i32 %notx, %y
+  %xor = xor i32 %and1, %and2
+  ret i32 %xor
+; CHECK-LABEL: @test15(
+; CHECK-NEXT: %xor = xor i32 %x, %y
+; CHECK-NEXT: ret i32 %xor
+}
+
+define i32 @test16(i32 %a, i32 %b) {
+  %or = xor i32 %a, %b
+  %and1 = and i32 %or, 1
+  %and2 = and i32 %b, -2
+  %xor = or i32 %and1, %and2
+  ret i32 %xor
+; CHECK-LABEL: @test16(
+; CHECK-NEXT: %1 = and i32 %a, 1
+; CHECK-NEXT: %xor = xor i32 %1, %b
+; CHECK-NEXT: ret i32 %xor
+}