1 files changed, 15 insertions, 4 deletions
diff --git a/compiler/rustc_codegen_llvm/src/builder.rs b/compiler/rustc_codegen_llvm/src/builder.rs
index 63e59ea13fc..b244ed959f9 100644
--- a/compiler/rustc_codegen_llvm/src/builder.rs
+++ b/compiler/rustc_codegen_llvm/src/builder.rs
@@ -26,6 +26,7 @@ use rustc_target::abi::{self, call::FnAbi, Align, Size, WrappingRange};
 use rustc_target::spec::{HasTargetSpec, SanitizerSet, Target};
 use smallvec::SmallVec;
 use std::borrow::Cow;
+use std::fmt::Display;
 use std::iter;
 use std::ops::Deref;
 use std::ptr;
@@ -153,14 +154,24 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
     fn set_span(&mut self, _span: Span) {}
 
-    fn append_block(cx: &'a CodegenCx<'ll, 'tcx>, llfn: &'ll Value, name: &str) -> &'ll BasicBlock {
+    fn append_block(
+        cx: &'a CodegenCx<'ll, 'tcx>,
+        llfn: &'ll Value,
+        name: impl Display,
+    ) -> &'ll BasicBlock {
         unsafe {
-            let name = SmallCStr::new(name);
-            llvm::LLVMAppendBasicBlockInContext(cx.llcx, llfn, name.as_ptr())
+            let c_str_name;
+            let name_ptr = if cx.tcx.sess.fewer_names() {
+                const { c"".as_ptr().cast() }
+            } else {
+                c_str_name = SmallCStr::new(&name.to_string());
+                c_str_name.as_ptr()
+            };
+            llvm::LLVMAppendBasicBlockInContext(cx.llcx, llfn, name_ptr)
         }
     }
 
-    fn append_sibling_block(&mut self, name: &str) -> &'ll BasicBlock {
+    fn append_sibling_block(&mut self, name: impl Display) -> &'ll BasicBlock {
         Self::append_block(self.cx, self.llfn(), name)
     }