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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
commit64d98f8ee037282c35007b64c2649055c56af1db (patch)
tree5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/codegen/nrvo.rs
parentAdding debian version 1.67.1+dfsg1-1. (diff)
downloadrustc-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/nrvo.rs')
-rw-r--r--tests/codegen/nrvo.rs17
1 files changed, 17 insertions, 0 deletions
diff --git a/tests/codegen/nrvo.rs b/tests/codegen/nrvo.rs
new file mode 100644
index 000000000..fddb0d1fb
--- /dev/null
+++ b/tests/codegen/nrvo.rs
@@ -0,0 +1,17 @@
+// compile-flags: -O
+
+#![crate_type = "lib"]
+
+// Ensure that we do not call `memcpy` for the following function.
+// `memset` and `init` should be called directly on the return pointer.
+#[no_mangle]
+pub fn nrvo(init: fn(&mut [u8; 4096])) -> [u8; 4096] {
+ // CHECK-LABEL: nrvo
+ // CHECK: @llvm.memset
+ // CHECK-NOT: @llvm.memcpy
+ // CHECK: ret
+ // CHECK-EMPTY
+ let mut buf = [0; 4096];
+ init(&mut buf);
+ buf
+}