rust/tests/mir-opt/matches_reduce_branches.mat...

48 lines
934 B
Diff

- // MIR for `match_zext_u8_i16` before MatchBranchSimplification
+ // MIR for `match_zext_u8_i16` after MatchBranchSimplification
fn match_zext_u8_i16(_1: EnumAu8) -> i16 {
debug i => _1;
let mut _0: i16;
let mut _2: u8;
+ let mut _3: u8;
bb0: {
_2 = discriminant(_1);
- switchInt(move _2) -> [0: bb5, 127: bb4, 128: bb3, 255: bb2, otherwise: bb1];
- }
-
- bb1: {
- unreachable;
- }
-
- bb2: {
- _0 = const 255_i16;
- goto -> bb6;
- }
-
- bb3: {
- _0 = const 128_i16;
- goto -> bb6;
- }
-
- bb4: {
- _0 = const 127_i16;
- goto -> bb6;
- }
-
- bb5: {
- _0 = const 0_i16;
- goto -> bb6;
- }
-
- bb6: {
+ StorageLive(_3);
+ _3 = move _2;
+ _0 = copy _3 as i16 (IntToInt);
+ StorageDead(_3);
return;
}
}