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| ; This test makes sure that these instructions are properly eliminated.
| ;
|
| ; RUN: opt < %s -instcombine -S | FileCheck %s
| ; CHECK-NOT: xor
|
| define i32 @test1(i32 %A) {
| %B = xor i32 %A, -1
| %C = xor i32 %B, -1
| ret i32 %C
| }
|
| define i1 @test2(i32 %A, i32 %B) {
| ; Can change into setge
| %cond = icmp sle i32 %A, %B
| %Ret = xor i1 %cond, true
| ret i1 %Ret
| }
|
| ; Test that De Morgan's law can be instcombined.
| define i32 @test3(i32 %A, i32 %B) {
| %a = xor i32 %A, -1
| %b = xor i32 %B, -1
| %c = and i32 %a, %b
| %d = xor i32 %c, -1
| ret i32 %d
| }
|
| ; Test that De Morgan's law can work with constants.
| define i32 @test4(i32 %A, i32 %B) {
| %a = xor i32 %A, -1
| %c = and i32 %a, 5
| %d = xor i32 %c, -1
| ret i32 %d
| }
|
| ; Test the mirror of De Morgan's law.
| define i32 @test5(i32 %A, i32 %B) {
| %a = xor i32 %A, -1
| %b = xor i32 %B, -1
| %c = or i32 %a, %b
| %d = xor i32 %c, -1
| ret i32 %d
| }
|
| ; PR2298
| define zeroext i8 @test6(i32 %a, i32 %b) {
| entry:
| %tmp1not = xor i32 %a, -1
| %tmp2not = xor i32 %b, -1
| %tmp3 = icmp slt i32 %tmp1not, %tmp2not
| %retval67 = zext i1 %tmp3 to i8
| ret i8 %retval67
| }
|
| define <2 x i1> @test7(<2 x i32> %A, <2 x i32> %B) {
| %cond = icmp sle <2 x i32> %A, %B
| %Ret = xor <2 x i1> %cond, <i1 true, i1 true>
| ret <2 x i1> %Ret
| }
|
|
