; This test makes sure that these instructions are properly eliminated. ; ; RUN: opt < %s -instcombine -S | not grep xor define i32 @test1(i32 %A) { %B = xor i32 %A, -1 ; <i32> [#uses=1] %C = xor i32 %B, -1 ; <i32> [#uses=1] ret i32 %C } define i1 @test2(i32 %A, i32 %B) { ; Can change into setge %cond = icmp sle i32 %A, %B ; <i1> [#uses=1] %Ret = xor i1 %cond, true ; <i1> [#uses=1] ret i1 %Ret } ; Test that demorgans law can be instcombined define i32 @test3(i32 %A, i32 %B) { %a = xor i32 %A, -1 ; <i32> [#uses=1] %b = xor i32 %B, -1 ; <i32> [#uses=1] %c = and i32 %a, %b ; <i32> [#uses=1] %d = xor i32 %c, -1 ; <i32> [#uses=1] ret i32 %d } ; Test that demorgens law can work with constants define i32 @test4(i32 %A, i32 %B) { %a = xor i32 %A, -1 ; <i32> [#uses=1] %c = and i32 %a, 5 ; <i32> [#uses=1] %d = xor i32 %c, -1 ; <i32> [#uses=1] ret i32 %d } ; test the mirror of demorgans law... define i32 @test5(i32 %A, i32 %B) { %a = xor i32 %A, -1 ; <i32> [#uses=1] %b = xor i32 %B, -1 ; <i32> [#uses=1] %c = or i32 %a, %b ; <i32> [#uses=1] %d = xor i32 %c, -1 ; <i32> [#uses=1] ret i32 %d } ; PR2298 define zeroext i8 @test6(i32 %a, i32 %b) nounwind { entry: %tmp1not = xor i32 %a, -1 ; <i32> [#uses=1] %tmp2not = xor i32 %b, -1 ; <i32> [#uses=1] %tmp3 = icmp slt i32 %tmp1not, %tmp2not ; <i1> [#uses=1] %retval67 = zext i1 %tmp3 to i8 ; <i8> [#uses=1] ret i8 %retval67 }