1 // compile-flags: -Copt-level=1
2 // only-x86_64
3
4 #![crate_type = "lib"]
5
6 // Check each of the 3 cases for `codegen_get_discr`.
7
8 // Case 0: One tagged variant.
9 pub enum Enum0 {
10 A(bool),
11 B,
12 }
13
14 // CHECK: define noundef i8 @match0{{.*}}
15 // CHECK-NEXT: start:
16 // CHECK-NEXT: %1 = icmp eq i8 %0, 2
17 // CHECK-NEXT: %2 = and i8 %0, 1
18 // CHECK-NEXT: %.0 = select i1 %1, i8 13, i8 %2
19 #[no_mangle]
match0(e: Enum0) -> u820 pub fn match0(e: Enum0) -> u8 {
21 use Enum0::*;
22 match e {
23 A(b) => b as u8,
24 B => 13,
25 }
26 }
27
28 // Case 1: Niche values are on a boundary for `range`.
29 pub enum Enum1 {
30 A(bool),
31 B,
32 C,
33 }
34
35 // CHECK: define noundef i8 @match1{{.*}}
36 // CHECK-NEXT: start:
37 // CHECK-NEXT: %1 = add i8 %0, -2
38 // CHECK-NEXT: %2 = zext i8 %1 to i64
39 // CHECK-NEXT: %3 = icmp ult i8 %1, 2
40 // CHECK-NEXT: %4 = add nuw nsw i64 %2, 1
41 // CHECK-NEXT: %_2 = select i1 %3, i64 %4, i64 0
42 #[no_mangle]
match1(e: Enum1) -> u843 pub fn match1(e: Enum1) -> u8 {
44 use Enum1::*;
45 match e {
46 A(b) => b as u8,
47 B => 13,
48 C => 100,
49 }
50 }
51
52 // Case 2: Special cases don't apply.
53 pub enum X {
54 _2=2, _3, _4, _5, _6, _7, _8, _9, _10, _11,
55 _12, _13, _14, _15, _16, _17, _18, _19, _20,
56 _21, _22, _23, _24, _25, _26, _27, _28, _29,
57 _30, _31, _32, _33, _34, _35, _36, _37, _38,
58 _39, _40, _41, _42, _43, _44, _45, _46, _47,
59 _48, _49, _50, _51, _52, _53, _54, _55, _56,
60 _57, _58, _59, _60, _61, _62, _63, _64, _65,
61 _66, _67, _68, _69, _70, _71, _72, _73, _74,
62 _75, _76, _77, _78, _79, _80, _81, _82, _83,
63 _84, _85, _86, _87, _88, _89, _90, _91, _92,
64 _93, _94, _95, _96, _97, _98, _99, _100, _101,
65 _102, _103, _104, _105, _106, _107, _108, _109,
66 _110, _111, _112, _113, _114, _115, _116, _117,
67 _118, _119, _120, _121, _122, _123, _124, _125,
68 _126, _127, _128, _129, _130, _131, _132, _133,
69 _134, _135, _136, _137, _138, _139, _140, _141,
70 _142, _143, _144, _145, _146, _147, _148, _149,
71 _150, _151, _152, _153, _154, _155, _156, _157,
72 _158, _159, _160, _161, _162, _163, _164, _165,
73 _166, _167, _168, _169, _170, _171, _172, _173,
74 _174, _175, _176, _177, _178, _179, _180, _181,
75 _182, _183, _184, _185, _186, _187, _188, _189,
76 _190, _191, _192, _193, _194, _195, _196, _197,
77 _198, _199, _200, _201, _202, _203, _204, _205,
78 _206, _207, _208, _209, _210, _211, _212, _213,
79 _214, _215, _216, _217, _218, _219, _220, _221,
80 _222, _223, _224, _225, _226, _227, _228, _229,
81 _230, _231, _232, _233, _234, _235, _236, _237,
82 _238, _239, _240, _241, _242, _243, _244, _245,
83 _246, _247, _248, _249, _250, _251, _252, _253,
84 }
85
86 pub enum Enum2 {
87 A(X),
88 B,
89 C,
90 D,
91 E,
92 }
93
94 // CHECK: define noundef i8 @match2{{.*}}
95 // CHECK-NEXT: start:
96 // CHECK-NEXT: %1 = add i8 %0, 2
97 // CHECK-NEXT: %2 = zext i8 %1 to i64
98 // CHECK-NEXT: %3 = icmp ult i8 %1, 4
99 // CHECK-NEXT: %4 = add nuw nsw i64 %2, 1
100 // CHECK-NEXT: %_2 = select i1 %3, i64 %4, i64 0
101 // CHECK-NEXT: switch i64 %_2, label {{.*}} [
102 #[no_mangle]
match2(e: Enum2) -> u8103 pub fn match2(e: Enum2) -> u8 {
104 use Enum2::*;
105 match e {
106 A(b) => b as u8,
107 B => 13,
108 C => 100,
109 D => 200,
110 E => 250,
111 }
112 }
113