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-rw-r--r--tests/codegen/issues/issue-105386-ub-in-debuginfo.rs22
1 files changed, 22 insertions, 0 deletions
diff --git a/tests/codegen/issues/issue-105386-ub-in-debuginfo.rs b/tests/codegen/issues/issue-105386-ub-in-debuginfo.rs
new file mode 100644
index 000000000..d54ac9e33
--- /dev/null
+++ b/tests/codegen/issues/issue-105386-ub-in-debuginfo.rs
@@ -0,0 +1,22 @@
+// compile-flags: --crate-type=lib -O -Cdebuginfo=2 -Cno-prepopulate-passes
+// min-llvm-version: 15.0 # this test uses opaque pointer notation
+#![feature(stmt_expr_attributes)]
+
+pub struct S([usize; 8]);
+
+#[no_mangle]
+pub fn outer_function(x: S, y: S) -> usize {
+ (#[inline(always)]|| {
+ let _z = x;
+ y.0[0]
+ })()
+}
+
+// Check that we do not attempt to load from the spilled arg before it is assigned to
+// when generating debuginfo.
+// CHECK-LABEL: @outer_function
+// CHECK: [[spill:%.*]] = alloca %"[closure@{{.*.rs}}:9:23: 9:25]"
+// CHECK-NOT: [[ptr_tmp:%.*]] = getelementptr inbounds %"[closure@{{.*.rs}}:9:23: 9:25]", ptr [[spill]]
+// CHECK-NOT: [[load:%.*]] = load ptr, ptr
+// CHECK: call void @llvm.lifetime.start{{.*}}({{.*}}, ptr [[spill]])
+// CHECK: call void @llvm.memcpy{{.*}}(ptr {{align .*}} [[spill]], ptr {{align .*}} %x