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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/slice_as_from_ptr_range.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/slice_as_from_ptr_range.rs')
| -rw-r--r-- | tests/codegen-llvm/slice_as_from_ptr_range.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/codegen-llvm/slice_as_from_ptr_range.rs b/tests/codegen-llvm/slice_as_from_ptr_range.rs new file mode 100644 index 00000000000..2073f05c07f --- /dev/null +++ b/tests/codegen-llvm/slice_as_from_ptr_range.rs @@ -0,0 +1,21 @@ +//@ compile-flags: -Copt-level=3 +//@ only-64bit (because we're using [ui]size) + +#![crate_type = "lib"] +#![feature(slice_from_ptr_range)] + +// This is intentionally using a non-power-of-two array length, +// as that's where the optimization differences show up + +// CHECK-LABEL: @flatten_via_ptr_range +#[no_mangle] +pub fn flatten_via_ptr_range(slice_of_arrays: &[[i32; 13]]) -> &[i32] { + // CHECK-NOT: lshr + // CHECK-NOT: udiv + // CHECK: mul nuw nsw i64 %{{.+}}, 13 + // CHECK-NOT: lshr + // CHECK-NOT: udiv + let r = slice_of_arrays.as_ptr_range(); + let r = r.start.cast()..r.end.cast(); + unsafe { core::slice::from_ptr_range(r) } +} |