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-rw-r--r--tests/codegen-llvm/fixed-x18.rs23
1 files changed, 23 insertions, 0 deletions
diff --git a/tests/codegen-llvm/fixed-x18.rs b/tests/codegen-llvm/fixed-x18.rs
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+++ b/tests/codegen-llvm/fixed-x18.rs
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+// Test that the `reserve-x18` target feature is (not) emitted when
+// the `-Zfixed-x18` flag is (not) set.
+
+//@ add-core-stubs
+//@ revisions: unset set
+//@ needs-llvm-components: aarch64
+//@ compile-flags: --target aarch64-unknown-none
+//@ [set] compile-flags: -Zfixed-x18
+
+#![crate_type = "lib"]
+#![feature(no_core, lang_items)]
+#![no_core]
+
+extern crate minicore;
+use minicore::*;
+
+#[no_mangle]
+pub fn foo() {
+    // CHECK: @foo() unnamed_addr #0
+
+    // unset-NOT: attributes #0 = { {{.*}}"target-features"="{{[^"]*}}+reserve-x18{{.*}} }
+    // set: attributes #0 = { {{.*}}"target-features"="{{[^"]*}}+reserve-x18{{.*}} }
+}