1 files changed, 42 insertions, 0 deletions
diff --git a/tests/codegen-llvm/zst-offset.rs b/tests/codegen-llvm/zst-offset.rs
new file mode 100644
index 00000000000..475394a8815
--- /dev/null
+++ b/tests/codegen-llvm/zst-offset.rs
@@ -0,0 +1,42 @@
+//@ compile-flags: -C no-prepopulate-passes -Copt-level=0
+
+#![crate_type = "lib"]
+#![feature(repr_simd)]
+
+// Hack to get the correct size for the length part in slices
+// CHECK: @helper([[USIZE:i[0-9]+]] %_1)
+#[no_mangle]
+pub fn helper(_: usize) {}
+
+// Check that we correctly generate a GEP for a ZST that is not included in Scalar layout
+// CHECK-LABEL: @scalar_layout
+#[no_mangle]
+pub fn scalar_layout(s: &(u64, ())) {
+    // CHECK: getelementptr inbounds i8, {{.+}}, [[USIZE]] 8
+    let x = &s.1;
+    witness(&x); // keep variable in an alloca
+}
+
+// Check that we correctly generate a GEP for a ZST that is not included in ScalarPair layout
+// CHECK-LABEL: @scalarpair_layout
+#[no_mangle]
+pub fn scalarpair_layout(s: &(u64, u32, ())) {
+    // CHECK: getelementptr inbounds i8, {{.+}}, [[USIZE]] 12
+    let x = &s.2;
+    witness(&x); // keep variable in an alloca
+}
+
+#[repr(simd)]
+pub struct U64x4([u64; 4]);
+
+// Check that we correctly generate a GEP for a ZST that is not included in Vector layout
+// CHECK-LABEL: @vector_layout
+#[no_mangle]
+pub fn vector_layout(s: &(U64x4, ())) {
+    // CHECK: getelementptr inbounds i8, {{.+}}, [[USIZE]] 32
+    let x = &s.1;
+    witness(&x); // keep variable in an alloca
+}
+
+#[inline(never)]
+fn witness(_: &impl Sized) {}