blob: edb402a125ac10e8f03a9cc847b1f6f9c52d7892 [file] [log] [blame]
; 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
}