| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| ; These tests are for Integer BitWidth <= 64 && BitWidth % 2 != 0. |
| define i23 @test1(i23 %A) { |
| ;; A | ~A == -1 |
| %NotA = xor i23 -1, %A |
| %B = or i23 %A, %NotA |
| ret i23 %B |
| ; CHECK-LABEL: @test1 |
| ; CHECK-NEXT: ret i23 -1 |
| } |
| |
| define i39 @test2(i39 %V, i39 %M) { |
| ;; If we have: ((V + N) & C1) | (V & C2) |
| ;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0 |
| ;; replace with V+N. |
| %C1 = xor i39 274877906943, -1 ;; C2 = 274877906943 |
| %N = and i39 %M, 274877906944 |
| %A = add i39 %V, %N |
| %B = and i39 %A, %C1 |
| %D = and i39 %V, 274877906943 |
| %R = or i39 %B, %D |
| ret i39 %R |
| ; CHECK-LABEL: @test2 |
| ; CHECK-NEXT: %N = and i39 %M, -274877906944 |
| ; CHECK-NEXT: %A = add i39 %N, %V |
| ; CHECK-NEXT: ret i39 %A |
| } |
| |
| ; These tests are for Integer BitWidth > 64 && BitWidth <= 1024. |
| define i1023 @test4(i1023 %A) { |
| ;; A | ~A == -1 |
| %NotA = xor i1023 -1, %A |
| %B = or i1023 %A, %NotA |
| ret i1023 %B |
| ; CHECK-LABEL: @test4 |
| ; CHECK-NEXT: ret i1023 -1 |
| } |
| |
| define i399 @test5(i399 %V, i399 %M) { |
| ;; If we have: ((V + N) & C1) | (V & C2) |
| ;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0 |
| ;; replace with V+N. |
| %C1 = xor i399 274877906943, -1 ;; C2 = 274877906943 |
| %N = and i399 %M, 18446742974197923840 |
| %A = add i399 %V, %N |
| %B = and i399 %A, %C1 |
| %D = and i399 %V, 274877906943 |
| %R = or i399 %B, %D |
| ret i399 %R |
| ; CHECK-LABEL: @test5 |
| ; CHECK-NEXT: %N = and i399 %M, 18446742974197923840 |
| ; CHECK-NEXT: %A = add i399 %N, %V |
| ; CHECK-NEXT: ret i399 %A |
| } |
| |