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Diffstat (limited to 'tests/mir-opt/building/custom/terminators.rs')
-rw-r--r-- | tests/mir-opt/building/custom/terminators.rs | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/tests/mir-opt/building/custom/terminators.rs b/tests/mir-opt/building/custom/terminators.rs new file mode 100644 index 000000000..c23233fcf --- /dev/null +++ b/tests/mir-opt/building/custom/terminators.rs @@ -0,0 +1,108 @@ +#![feature(custom_mir, core_intrinsics)] + +extern crate core; +use core::intrinsics::mir::*; + +fn ident<T>(t: T) -> T { + t +} + +// EMIT_MIR terminators.direct_call.built.after.mir +#[custom_mir(dialect = "built")] +fn direct_call(x: i32) -> i32 { + mir!( + { + Call(RET, retblock, ident(x)) + } + + retblock = { + Return() + } + ) +} + +// EMIT_MIR terminators.indirect_call.built.after.mir +#[custom_mir(dialect = "built")] +fn indirect_call(x: i32, f: fn(i32) -> i32) -> i32 { + mir!( + { + Call(RET, retblock, f(x)) + } + + retblock = { + Return() + } + ) +} + +struct WriteOnDrop<'a>(&'a mut i32, i32); + +impl<'a> Drop for WriteOnDrop<'a> { + fn drop(&mut self) { + *self.0 = self.1; + } +} + +// EMIT_MIR terminators.drop_first.built.after.mir +#[custom_mir(dialect = "built")] +fn drop_first<'a>(a: WriteOnDrop<'a>, b: WriteOnDrop<'a>) { + mir!( + { + DropAndReplace(a, Move(b), retblock) + } + + retblock = { + Return() + } + ) +} + +// EMIT_MIR terminators.drop_second.built.after.mir +#[custom_mir(dialect = "built")] +fn drop_second<'a>(a: WriteOnDrop<'a>, b: WriteOnDrop<'a>) { + mir!( + { + Drop(b, retblock) + } + + retblock = { + Return() + } + ) +} + +// EMIT_MIR terminators.assert_nonzero.built.after.mir +#[custom_mir(dialect = "built")] +fn assert_nonzero(a: i32) { + mir!( + { + match a { + 0 => unreachable, + _ => retblock + } + } + + unreachable = { + Unreachable() + } + + retblock = { + Return() + } + ) +} + +fn main() { + assert_eq!(direct_call(5), 5); + assert_eq!(indirect_call(5, ident), 5); + + let mut a = 0; + let mut b = 0; + drop_first(WriteOnDrop(&mut a, 1), WriteOnDrop(&mut b, 1)); + assert_eq!((a, b), (1, 0)); + + let mut a = 0; + let mut b = 0; + drop_second(WriteOnDrop(&mut a, 1), WriteOnDrop(&mut b, 1)); + assert_eq!((a, b), (0, 1)); +} |