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add codegen test

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This commit is contained in:
The8472 2020-12-09 01:08:11 +01:00
parent 6c67e55270
commit 17f4c2a487
1 changed files with 13 additions and 0 deletions
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src/test/codegen/vec-in-place.rs Normal file
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// compile-flags: -O
// min-llvm-version: 11.0
#![crate_type = "lib"]
// Ensure that trivial casts of vec elements are O(1)
// CHECK-LABEL: @vec_iterator_cast
#[no_mangle]
pub fn vec_iterator_cast(vec: Vec<isize>) -> Vec<usize> {
// CHECK-NOT: loop
// CHECK-NOT: call
vec.into_iter().map(|e| e as usize).collect()
}