forked from OSchip/llvm-project
80 lines
2.2 KiB
LLVM
80 lines
2.2 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; These tests are for Integer BitWidth <= 64 && BitWidth % 2 != 0.
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define i23 @test1(i23 %A) {
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;; A | ~A == -1
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%NotA = xor i23 -1, %A
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%B = or i23 %A, %NotA
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ret i23 %B
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; CHECK-LABEL: @test1
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; CHECK-NEXT: ret i23 -1
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}
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define i39 @test2(i39 %V, i39 %M) {
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;; If we have: ((V + N) & C1) | (V & C2)
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;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0
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;; replace with V+N.
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%C1 = xor i39 274877906943, -1 ;; C2 = 274877906943
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%N = and i39 %M, 274877906944
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%A = add i39 %V, %N
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%B = and i39 %A, %C1
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%D = and i39 %V, 274877906943
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%R = or i39 %B, %D
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ret i39 %R
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; CHECK-LABEL: @test2
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; CHECK-NEXT: %N = and i39 %M, -274877906944
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; CHECK-NEXT: %A = add i39 %N, %V
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; CHECK-NEXT: ret i39 %A
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}
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define i43 @test3(i43 %A, i43 %B) {
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;; (~A | ~B) == (~(A & B)) - De Morgan's Law
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%NotA = xor i43 %A, -1
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%NotB = xor i43 %B, -1
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%C1 = or i43 %NotA, %NotB
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ret i43 %C1
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; CHECK-LABEL: @test3
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; CHECK-NEXT: %C1.demorgan = and i43 %A, %B
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; CHECK-NEXT: %C1 = xor i43 %C1.demorgan, -1
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; CHECK-NEXT: ret i43 %C1
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}
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; These tests are for Integer BitWidth > 64 && BitWidth <= 1024.
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define i1023 @test4(i1023 %A) {
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;; A | ~A == -1
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%NotA = xor i1023 -1, %A
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%B = or i1023 %A, %NotA
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ret i1023 %B
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; CHECK-LABEL: @test4
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; CHECK-NEXT: ret i1023 -1
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}
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define i399 @test5(i399 %V, i399 %M) {
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;; If we have: ((V + N) & C1) | (V & C2)
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;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0
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;; replace with V+N.
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%C1 = xor i399 274877906943, -1 ;; C2 = 274877906943
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%N = and i399 %M, 18446742974197923840
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%A = add i399 %V, %N
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%B = and i399 %A, %C1
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%D = and i399 %V, 274877906943
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%R = or i399 %B, %D
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ret i399 %R
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; CHECK-LABEL: @test5
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; CHECK-NEXT: %N = and i399 %M, 18446742974197923840
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; CHECK-NEXT: %A = add i399 %N, %V
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; CHECK-NEXT: ret i399 %A
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}
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define i129 @test6(i129 %A, i129 %B) {
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;; (~A | ~B) == (~(A & B)) - De Morgan's Law
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%NotA = xor i129 %A, -1
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%NotB = xor i129 %B, -1
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%C1 = or i129 %NotA, %NotB
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ret i129 %C1
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; CHECK-LABEL: @test6
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; CHECK-NEXT: %C1.demorgan = and i129 %A, %B
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; CHECK-NEXT: %C1 = xor i129 %C1.demorgan, -1
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; CHECK-NEXT: ret i129 %C1
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}
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