Merge 1.70 into proxmox/bookworm

[rustc.git] / tests / codegen / issue-96497-slice-size-nowrap.rs

diff --git a/tests/codegen/issue-96497-slice-size-nowrap.rs b/tests/codegen/issue-96497-slice-size-nowrap.rs
deleted file mode 100644 (file)
index 0413ed6..0000000
--- a/tests/codegen/issue-96497-slice-size-nowrap.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-// This test case checks that LLVM is aware that computing the size of a slice cannot wrap.
-// The possibility of wrapping results in an additional branch when dropping boxed slices
-// in some situations, see https://github.com/rust-lang/rust/issues/96497#issuecomment-1112865218
-
-// compile-flags: -O
-// min-llvm-version: 15.0
-
-#![crate_type="lib"]
-
-// CHECK-LABEL: @simple_size_of_nowrap
-#[no_mangle]
-pub fn simple_size_of_nowrap(x: &[u32]) -> usize {
-    // Make sure the shift used to compute the size has a nowrap flag.
-
-    // CHECK: [[A:%.*]] = shl nsw {{.*}}, 2
-    // CHECK-NEXT: ret {{.*}} [[A]]
-    core::mem::size_of_val(x)
-}
-
-// CHECK-LABEL: @drop_write
-#[no_mangle]
-pub fn drop_write(mut x: Box<[u32]>) {
-    // Check that this write is optimized out.
-    // This depends on the size calculation not wrapping,
-    // since otherwise LLVM can't tell that the memory is always deallocated if the slice len > 0.
-
-    // CHECK-NOT: store i32 42
-    x[1] = 42;
-}