Auto merge of #88556 - m-ou-se:rollup-q636wyd, r=m-ou-se

Rollup of 9 pull requests

Successful merges:

 - #86376 (Emit specific warning to clarify that `#[no_mangle]` should not be applied on foreign statics or functions)
 - #88040 (BTree: remove Ord bound from new)
 - #88053 (Fix the flock fallback implementation)
 - #88350 (add support for clobbering xer, cr, and cr[0-7] for asm! on OpenPower/PowerPC)
 - #88410 (Remove bolding on associated constants)
 - #88525 (fix(rustc_typeck): produce better errors for dyn auto trait)
 - #88542 (Use the return value of readdir_r() instead of errno)
 - #88548 (Stabilize `Iterator::intersperse()`)
 - #88551 (Stabilize `UnsafeCell::raw_get()`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 48 insertions, 0 deletions

diff --git a/src/test/codegen/asm-powerpc-clobbers.rs b/src/test/codegen/asm-powerpc-clobbers.rs
new file mode 100644
index 00000000000..91a82c60120
--- /dev/null
+++ b/src/test/codegen/asm-powerpc-clobbers.rs
@@ -0,0 +1,48 @@
+// min-llvm-version: 10.0.1
+// revisions: powerpc powerpc64 powerpc64le
+//[powerpc] compile-flags: --target powerpc-unknown-linux-gnu
+//[powerpc] needs-llvm-components: powerpc
+//[powerpc64] compile-flags: --target powerpc64-unknown-linux-gnu
+//[powerpc64] needs-llvm-components: powerpc
+//[powerpc64le] compile-flags: --target powerpc64le-unknown-linux-gnu
+//[powerpc64le] needs-llvm-components: powerpc
+
+#![crate_type = "rlib"]
+#![feature(no_core, rustc_attrs, lang_items)]
+#![no_core]
+
+#[lang = "sized"]
+trait Sized {}
+
+#[rustc_builtin_macro]
+macro_rules! asm {
+    () => {};
+}
+
+// CHECK-LABEL: @cr_clobber
+// CHECK: call void asm sideeffect "", "~{cr}"()
+#[no_mangle]
+pub unsafe fn cr_clobber() {
+    asm!("", out("cr") _, options(nostack, nomem));
+}
+
+// CHECK-LABEL: @cr0_clobber
+// CHECK: call void asm sideeffect "", "~{cr0}"()
+#[no_mangle]
+pub unsafe fn cr0_clobber() {
+    asm!("", out("cr0") _, options(nostack, nomem));
+}
+
+// CHECK-LABEL: @cr5_clobber
+// CHECK: call void asm sideeffect "", "~{cr5}"()
+#[no_mangle]
+pub unsafe fn cr5_clobber() {
+    asm!("", out("cr5") _, options(nostack, nomem));
+}
+
+// CHECK-LABEL: @xer_clobber
+// CHECK: call void asm sideeffect "", "~{xer}"()
+#[no_mangle]
+pub unsafe fn xer_clobber() {
+    asm!("", out("xer") _, options(nostack, nomem));
+}