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| author | Guillaume Gomez <guillaume1.gomez@gmail.com> | 2025-07-21 14:34:12 +0200 |
|---|---|---|
| committer | Guillaume Gomez <guillaume1.gomez@gmail.com> | 2025-07-22 14:28:48 +0200 |
| commit | a27f3e3fd1e4d16160f8885b6b06665b5319f56c (patch) | |
| tree | b033935392cbadf6f85d2dbddf433a88e323aeeb /tests/codegen-llvm/vecdeque-drain.rs | |
| parent | ed93c1783b404d728d4809973a0550eb33cd293f (diff) | |
| download | rust-a27f3e3fd1e4d16160f8885b6b06665b5319f56c.tar.gz rust-a27f3e3fd1e4d16160f8885b6b06665b5319f56c.zip | |
Rename `tests/codegen` into `tests/codegen-llvm`
Diffstat (limited to 'tests/codegen-llvm/vecdeque-drain.rs')
| -rw-r--r-- | tests/codegen-llvm/vecdeque-drain.rs | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/tests/codegen-llvm/vecdeque-drain.rs b/tests/codegen-llvm/vecdeque-drain.rs new file mode 100644 index 00000000000..a5e5da65013 --- /dev/null +++ b/tests/codegen-llvm/vecdeque-drain.rs @@ -0,0 +1,70 @@ +// Check that draining at the front or back doesn't copy memory. + +//@ compile-flags: -Copt-level=3 +//@ needs-deterministic-layouts +//@ ignore-std-debug-assertions (FIXME: checks for call detect scoped noalias metadata) + +#![crate_type = "lib"] + +use std::collections::VecDeque; + +// CHECK-LABEL: @clear +// CHECK-NOT: call +// CHECK-NOT: br +// CHECK: getelementptr inbounds +// CHECK-NEXT: {{call void @llvm.memset|store}} +// CHECK-NEXT: ret void +#[no_mangle] +pub fn clear(v: &mut VecDeque<i32>) { + v.drain(..); +} + +// CHECK-LABEL: @truncate +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK-NOT: br +// CHECK: ret void +#[no_mangle] +pub fn truncate(v: &mut VecDeque<i32>, n: usize) { + if n < v.len() { + v.drain(n..); + } +} + +// CHECK-LABEL: @advance +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK: br +// CHECK-NOT: call +// CHECK-NOT: br +// CHECK: ret void +#[no_mangle] +pub fn advance(v: &mut VecDeque<i32>, n: usize) { + if n < v.len() { + v.drain(..n); + } else { + v.clear(); + } +} + +// CHECK-LABEL: @remove +// CHECK: call +// CHECK: ret void +#[no_mangle] +pub fn remove(v: &mut VecDeque<i32>, a: usize, b: usize) { + v.drain(a..b); +} |