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|
; 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
}
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