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; RUN: opt < %s -instcombine -S | FileCheck %s
define i32 @test1(i32 %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret i32 %A
;
%B = xor i32 %A, -1
%C = xor i32 %B, -1
ret i32 %C
}
define i1 @invert_icmp(i32 %A, i32 %B) {
; CHECK-LABEL: @invert_icmp(
; CHECK-NEXT: [[NOT:%.*]] = icmp sgt i32 %A, %B
; CHECK-NEXT: ret i1 [[NOT]]
;
%cmp = icmp sle i32 %A, %B
%not = xor i1 %cmp, true
ret i1 %not
}
; PR1570
define i1 @invert_fcmp(float %X, float %Y) {
; CHECK-LABEL: @invert_fcmp(
; CHECK-NEXT: [[NOT:%.*]] = fcmp uge float %X, %Y
; CHECK-NEXT: ret i1 [[NOT]]
;
%cmp = fcmp olt float %X, %Y
%not = xor i1 %cmp, true
ret i1 %not
}
; Test that De Morgan's law can be instcombined.
define i32 @test3(i32 %A, i32 %B) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i32 %A, %B
; CHECK-NEXT: ret i32 [[C_DEMORGAN]]
;
%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) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[D1:%.*]] = or i32 %A, -6
; CHECK-NEXT: ret i32 [[D1]]
;
%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) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[C_DEMORGAN:%.*]] = and i32 %A, %B
; CHECK-NEXT: ret i32 [[C_DEMORGAN]]
;
%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) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 %b, %a
; CHECK-NEXT: [[RETVAL67:%.*]] = zext i1 [[TMP3]] to i8
; CHECK-NEXT: ret i8 [[RETVAL67]]
;
%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) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[RET:%.*]] = icmp sgt <2 x i32> %A, %B
; CHECK-NEXT: ret <2 x i1> [[RET]]
;
%cond = icmp sle <2 x i32> %A, %B
%Ret = xor <2 x i1> %cond, <i1 true, i1 true>
ret <2 x i1> %Ret
}
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