diff options
Diffstat (limited to 'llvm/test/Transforms')
-rw-r--r-- | llvm/test/Transforms/InstCombine/or-xor.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/or-xor.ll b/llvm/test/Transforms/InstCombine/or-xor.ll index 984178aeb34..e2a3baf2f35 100644 --- a/llvm/test/Transforms/InstCombine/or-xor.ll +++ b/llvm/test/Transforms/InstCombine/or-xor.ll @@ -160,3 +160,16 @@ define i32 @test16(i32 %x, i32 %y) { ; CHECK-NEXT: %xor = xor i32 %x, %y ; CHECK-NEXT: ret i32 %xor } + +; ((x & ~y) ^ (~x & y)) -> x ^ y +define i32 @test17(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: @test17( +; CHECK-NEXT: %xor = xor i32 %x, %y +; CHECK-NEXT: ret i32 %xor +} |