1 - // MIR for `foo` before MatchBranchSimplification
2 + // MIR for `foo` after MatchBranchSimplification
4 fn foo(_1: [u8; 16]) -> Option<[u8; 4]> {
5 debug bytes => _1; // in scope 0 at $DIR/issue_75439.rs:+0:12: +0:17
6 let mut _0: std::option::Option<[u8; 4]>; // return place in scope 0 at $DIR/issue_75439.rs:+0:32: +0:47
7 let _2: [u32; 4]; // in scope 0 at $DIR/issue_75439.rs:+2:9: +2:15
8 let mut _3: [u8; 16]; // in scope 0 at $DIR/issue_75439.rs:+2:47: +2:52
9 let mut _5: [u8; 4]; // in scope 0 at $DIR/issue_75439.rs:+5:14: +5:38
10 let mut _6: u32; // in scope 0 at $DIR/issue_75439.rs:+5:33: +5:35
12 debug dwords => _2; // in scope 1 at $DIR/issue_75439.rs:+2:9: +2:15
14 debug ip => _4; // in scope 3 at $DIR/issue_75439.rs:+4:27: +4:29
15 let _4: u32; // in scope 3 at $DIR/issue_75439.rs:+4:27: +4:29
24 StorageLive(_2); // scope 0 at $DIR/issue_75439.rs:+2:9: +2:15
25 StorageLive(_3); // scope 2 at $DIR/issue_75439.rs:+2:47: +2:52
26 _3 = _1; // scope 2 at $DIR/issue_75439.rs:+2:47: +2:52
27 _2 = transmute::<[u8; 16], [u32; 4]>(move _3) -> bb1; // scope 2 at $DIR/issue_75439.rs:+2:37: +2:53
29 // + span: $DIR/issue_75439.rs:8:37: 8:46
30 // + literal: Const { ty: unsafe extern "rust-intrinsic" fn([u8; 16]) -> [u32; 4] {transmute::<[u8; 16], [u32; 4]>}, val: Value(<ZST>) }
34 StorageDead(_3); // scope 2 at $DIR/issue_75439.rs:+2:52: +2:53
35 switchInt(_2[0 of 4]) -> [0: bb2, otherwise: bb8]; // scope 3 at $DIR/issue_75439.rs:+4:12: +4:30
39 switchInt(_2[1 of 4]) -> [0: bb3, otherwise: bb8]; // scope 3 at $DIR/issue_75439.rs:+4:12: +4:30
43 switchInt(_2[2 of 4]) -> [0: bb5, 4294901760: bb6, otherwise: bb8]; // scope 3 at $DIR/issue_75439.rs:+4:12: +4:30
47 StorageLive(_5); // scope 3 at $DIR/issue_75439.rs:+5:14: +5:38
48 StorageLive(_6); // scope 4 at $DIR/issue_75439.rs:+5:33: +5:35
49 _6 = _4; // scope 4 at $DIR/issue_75439.rs:+5:33: +5:35
50 _5 = transmute::<u32, [u8; 4]>(move _6) -> bb7; // scope 4 at $DIR/issue_75439.rs:+5:23: +5:36
52 // + span: $DIR/issue_75439.rs:11:23: 11:32
53 // + literal: Const { ty: unsafe extern "rust-intrinsic" fn(u32) -> [u8; 4] {transmute::<u32, [u8; 4]>}, val: Value(<ZST>) }
57 StorageLive(_4); // scope 3 at $DIR/issue_75439.rs:+4:27: +4:29
58 _4 = _2[3 of 4]; // scope 3 at $DIR/issue_75439.rs:+4:27: +4:29
59 goto -> bb4; // scope 3 at $DIR/issue_75439.rs:+4:12: +4:30
63 StorageLive(_4); // scope 3 at $DIR/issue_75439.rs:+4:27: +4:29
64 _4 = _2[3 of 4]; // scope 3 at $DIR/issue_75439.rs:+4:27: +4:29
65 goto -> bb4; // scope 3 at $DIR/issue_75439.rs:+4:12: +4:30
69 StorageDead(_6); // scope 4 at $DIR/issue_75439.rs:+5:35: +5:36
70 Deinit(_0); // scope 3 at $DIR/issue_75439.rs:+5:9: +5:39
71 ((_0 as Some).0: [u8; 4]) = move _5; // scope 3 at $DIR/issue_75439.rs:+5:9: +5:39
72 discriminant(_0) = 1; // scope 3 at $DIR/issue_75439.rs:+5:9: +5:39
73 StorageDead(_5); // scope 3 at $DIR/issue_75439.rs:+5:38: +5:39
74 StorageDead(_4); // scope 1 at $DIR/issue_75439.rs:+6:5: +6:6
75 goto -> bb9; // scope 1 at $DIR/issue_75439.rs:+4:5: +8:6
79 Deinit(_0); // scope 1 at $DIR/issue_75439.rs:+7:9: +7:13
80 discriminant(_0) = 0; // scope 1 at $DIR/issue_75439.rs:+7:9: +7:13
81 goto -> bb9; // scope 1 at $DIR/issue_75439.rs:+4:5: +8:6
85 StorageDead(_2); // scope 0 at $DIR/issue_75439.rs:+9:1: +9:2
86 return; // scope 0 at $DIR/issue_75439.rs:+9:2: +9:2