| ; This test makes sure that these instructions are properly eliminated. |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| |
| define i32 @test1(i32 %A) { |
| %B = or i32 %A, 0 |
| ret i32 %B |
| ; CHECK: @test1 |
| ; CHECK: ret i32 %A |
| } |
| |
| define i32 @test2(i32 %A) { |
| %B = or i32 %A, -1 |
| ret i32 %B |
| ; CHECK: @test2 |
| ; CHECK: ret i32 -1 |
| } |
| |
| define i8 @test2a(i8 %A) { |
| %B = or i8 %A, -1 |
| ret i8 %B |
| ; CHECK: @test2a |
| ; CHECK: ret i8 -1 |
| } |
| |
| define i1 @test3(i1 %A) { |
| %B = or i1 %A, false |
| ret i1 %B |
| ; CHECK: @test3 |
| ; CHECK: ret i1 %A |
| } |
| |
| define i1 @test4(i1 %A) { |
| %B = or i1 %A, true |
| ret i1 %B |
| ; CHECK: @test4 |
| ; CHECK: ret i1 true |
| } |
| |
| define i1 @test5(i1 %A) { |
| %B = or i1 %A, %A |
| ret i1 %B |
| ; CHECK: @test5 |
| ; CHECK: ret i1 %A |
| } |
| |
| define i32 @test6(i32 %A) { |
| %B = or i32 %A, %A |
| ret i32 %B |
| ; CHECK: @test6 |
| ; CHECK: ret i32 %A |
| } |
| |
| ; A | ~A == -1 |
| define i32 @test7(i32 %A) { |
| %NotA = xor i32 -1, %A |
| %B = or i32 %A, %NotA |
| ret i32 %B |
| ; CHECK: @test7 |
| ; CHECK: ret i32 -1 |
| } |
| |
| define i8 @test8(i8 %A) { |
| %B = or i8 %A, -2 |
| %C = or i8 %B, 1 |
| ret i8 %C |
| ; CHECK: @test8 |
| ; CHECK: ret i8 -1 |
| } |
| |
| ; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2) |
| define i8 @test9(i8 %A, i8 %B) { |
| %C = or i8 %A, 1 |
| %D = or i8 %B, -2 |
| %E = or i8 %C, %D |
| ret i8 %E |
| ; CHECK: @test9 |
| ; CHECK: ret i8 -1 |
| } |
| |
| define i8 @test10(i8 %A) { |
| %B = or i8 %A, 1 |
| %C = and i8 %B, -2 |
| ; (X & C1) | C2 --> (X | C2) & (C1|C2) |
| %D = or i8 %C, -2 |
| ret i8 %D |
| ; CHECK: @test10 |
| ; CHECK: ret i8 -2 |
| } |
| |
| define i8 @test11(i8 %A) { |
| %B = or i8 %A, -2 |
| %C = xor i8 %B, 13 |
| ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2) |
| %D = or i8 %C, 1 |
| %E = xor i8 %D, 12 |
| ret i8 %E |
| ; CHECK: @test11 |
| ; CHECK: ret i8 -1 |
| } |
| |
| define i32 @test12(i32 %A) { |
| ; Should be eliminated |
| %B = or i32 %A, 4 |
| %C = and i32 %B, 8 |
| ret i32 %C |
| ; CHECK: @test12 |
| ; CHECK: %C = and i32 %A, 8 |
| ; CHECK: ret i32 %C |
| } |
| |
| define i32 @test13(i32 %A) { |
| %B = or i32 %A, 12 |
| ; Always equal to 8 |
| %C = and i32 %B, 8 |
| ret i32 %C |
| ; CHECK: @test13 |
| ; CHECK: ret i32 8 |
| } |
| |
| define i1 @test14(i32 %A, i32 %B) { |
| %C1 = icmp ult i32 %A, %B |
| %C2 = icmp ugt i32 %A, %B |
| ; (A < B) | (A > B) === A != B |
| %D = or i1 %C1, %C2 |
| ret i1 %D |
| ; CHECK: @test14 |
| ; CHECK: %D = icmp ne i32 %A, %B |
| ; CHECK: ret i1 %D |
| } |
| |
| define i1 @test15(i32 %A, i32 %B) { |
| %C1 = icmp ult i32 %A, %B |
| %C2 = icmp eq i32 %A, %B |
| ; (A < B) | (A == B) === A <= B |
| %D = or i1 %C1, %C2 |
| ret i1 %D |
| ; CHECK: @test15 |
| ; CHECK: %D = icmp ule i32 %A, %B |
| ; CHECK: ret i1 %D |
| } |
| |
| define i32 @test16(i32 %A) { |
| %B = and i32 %A, 1 |
| ; -2 = ~1 |
| %C = and i32 %A, -2 |
| ; %D = and int %B, -1 == %B |
| %D = or i32 %B, %C |
| ret i32 %D |
| ; CHECK: @test16 |
| ; CHECK: ret i32 %A |
| } |
| |
| define i32 @test17(i32 %A) { |
| %B = and i32 %A, 1 |
| %C = and i32 %A, 4 |
| ; %D = and int %B, 5 |
| %D = or i32 %B, %C |
| ret i32 %D |
| ; CHECK: @test17 |
| ; CHECK: %D = and i32 %A, 5 |
| ; CHECK: ret i32 %D |
| } |
| |
| define i1 @test18(i32 %A) { |
| %B = icmp sge i32 %A, 100 |
| %C = icmp slt i32 %A, 50 |
| ;; (A-50) >u 50 |
| %D = or i1 %B, %C |
| ret i1 %D |
| ; CHECK: @test18 |
| ; CHECK: add i32 |
| ; CHECK: %D = icmp ugt |
| ; CHECK: ret i1 %D |
| } |
| |
| define i1 @test19(i32 %A) { |
| %B = icmp eq i32 %A, 50 |
| %C = icmp eq i32 %A, 51 |
| ;; (A-50) < 2 |
| %D = or i1 %B, %C |
| ret i1 %D |
| ; CHECK: @test19 |
| ; CHECK: add i32 |
| ; CHECK: %D = icmp ult |
| ; CHECK: ret i1 %D |
| } |
| |
| define i32 @test20(i32 %x) { |
| %y = and i32 %x, 123 |
| %z = or i32 %y, %x |
| ret i32 %z |
| ; CHECK: @test20 |
| ; CHECK: ret i32 %x |
| } |
| |
| define i32 @test21(i32 %tmp.1) { |
| %tmp.1.mask1 = add i32 %tmp.1, 2 |
| %tmp.3 = and i32 %tmp.1.mask1, -2 |
| %tmp.5 = and i32 %tmp.1, 1 |
| ;; add tmp.1, 2 |
| %tmp.6 = or i32 %tmp.5, %tmp.3 |
| ret i32 %tmp.6 |
| ; CHECK: @test21 |
| ; CHECK: add i32 %{{[^,]*}}, 2 |
| ; CHECK: ret i32 |
| } |
| |
| define i32 @test22(i32 %B) { |
| %ELIM41 = and i32 %B, 1 |
| %ELIM7 = and i32 %B, -2 |
| %ELIM5 = or i32 %ELIM41, %ELIM7 |
| ret i32 %ELIM5 |
| ; CHECK: @test22 |
| ; CHECK: ret i32 %B |
| } |
| |
| define i16 @test23(i16 %A) { |
| %B = lshr i16 %A, 1 |
| ;; fold or into xor |
| %C = or i16 %B, -32768 |
| %D = xor i16 %C, 8193 |
| ret i16 %D |
| ; CHECK: @test23 |
| ; CHECK: %B = lshr i16 %A, 1 |
| ; CHECK: %D = xor i16 %B, -24575 |
| ; CHECK: ret i16 %D |
| } |
| |
| ; PR1738 |
| define i1 @test24(double %X, double %Y) { |
| %tmp9 = fcmp uno double %X, 0.000000e+00 ; <i1> [#uses=1] |
| %tmp13 = fcmp uno double %Y, 0.000000e+00 ; <i1> [#uses=1] |
| %bothcond = or i1 %tmp13, %tmp9 ; <i1> [#uses=1] |
| ret i1 %bothcond |
| |
| ; CHECK: @test24 |
| ; CHECK: %bothcond = fcmp uno double %Y, %X ; <i1> [#uses=1] |
| ; CHECK: ret i1 %bothcond |
| } |
| |
| ; PR3266 & PR5276 |
| define i1 @test25(i32 %A, i32 %B) { |
| %C = icmp eq i32 %A, 0 |
| %D = icmp eq i32 %B, 57 |
| %E = or i1 %C, %D |
| %F = xor i1 %E, -1 |
| ret i1 %F |
| |
| ; CHECK: @test25 |
| ; CHECK: icmp ne i32 %A, 0 |
| ; CHECK-NEXT: icmp ne i32 %B, 57 |
| ; CHECK-NEXT: %F = and i1 |
| ; CHECK-NEXT: ret i1 %F |
| } |
| |
| ; PR5634 |
| define i1 @test26(i32 %A, i32 %B) { |
| %C1 = icmp eq i32 %A, 0 |
| %C2 = icmp eq i32 %B, 0 |
| ; (A == 0) & (A == 0) --> (A|B) == 0 |
| %D = and i1 %C1, %C2 |
| ret i1 %D |
| ; CHECK: @test26 |
| ; CHECK: or i32 %A, %B |
| ; CHECK: icmp eq i32 {{.*}}, 0 |
| ; CHECK: ret i1 |
| } |
| |
| ; PR5634 |
| define i1 @test27(i32* %A, i32* %B) { |
| %C1 = icmp eq i32* %A, null |
| %C2 = icmp eq i32* %B, null |
| ; (A == 0) & (A == 0) --> (A|B) == 0 |
| %D = and i1 %C1, %C2 |
| ret i1 %D |
| ; CHECK: @test27 |
| ; CHECK: ptrtoint i32* %A |
| ; CHECK: ptrtoint i32* %B |
| ; CHECK: or i32 |
| ; CHECK: icmp eq i32 {{.*}}, 0 |
| ; CHECK: ret i1 |
| } |
| |
| ; PR5634 |
| define i1 @test28(i32 %A, i32 %B) { |
| %C1 = icmp ne i32 %A, 0 |
| %C2 = icmp ne i32 %B, 0 |
| ; (A != 0) | (A != 0) --> (A|B) != 0 |
| %D = or i1 %C1, %C2 |
| ret i1 %D |
| ; CHECK: @test28 |
| ; CHECK: or i32 %A, %B |
| ; CHECK: icmp ne i32 {{.*}}, 0 |
| ; CHECK: ret i1 |
| } |