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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/codegen/box-maybe-uninit-llvm14.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/box-maybe-uninit-llvm14.rs')
-rw-r--r-- | tests/codegen/box-maybe-uninit-llvm14.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tests/codegen/box-maybe-uninit-llvm14.rs b/tests/codegen/box-maybe-uninit-llvm14.rs new file mode 100644 index 000000000..b0c88f76c --- /dev/null +++ b/tests/codegen/box-maybe-uninit-llvm14.rs @@ -0,0 +1,34 @@ +// compile-flags: -O + +// Once we're done with llvm 14 and earlier, this test can be deleted. + +#![crate_type = "lib"] + +use std::mem::MaybeUninit; + +// Boxing a `MaybeUninit` value should not copy junk from the stack +#[no_mangle] +pub fn box_uninitialized() -> Box<MaybeUninit<usize>> { + // CHECK-LABEL: @box_uninitialized + // CHECK-NOT: store + // CHECK-NOT: alloca + // CHECK-NOT: memcpy + // CHECK-NOT: memset + Box::new(MaybeUninit::uninit()) +} + +// https://github.com/rust-lang/rust/issues/58201 +#[no_mangle] +pub fn box_uninitialized2() -> Box<MaybeUninit<[usize; 1024 * 1024]>> { + // CHECK-LABEL: @box_uninitialized2 + // CHECK-NOT: store + // CHECK-NOT: alloca + // CHECK-NOT: memcpy + // CHECK-NOT: memset + Box::new(MaybeUninit::uninit()) +} + +// Hide the LLVM 15+ `allocalign` attribute in the declaration of __rust_alloc +// from the CHECK-NOT above. We don't check the attributes here because we can't rely +// on all of them being set until LLVM 15. +// CHECK: declare noalias{{.*}} @__rust_alloc(i{{[0-9]+}} noundef, i{{[0-9]+.*}} noundef) |