1 files changed, 41 insertions, 0 deletions
diff --git a/tests/codegen/fastcall-inreg.rs b/tests/codegen/fastcall-inreg.rs
new file mode 100644
index 000000000..02f5d5459
--- /dev/null
+++ b/tests/codegen/fastcall-inreg.rs
@@ -0,0 +1,41 @@
+// Checks if the "fastcall" calling convention marks function arguments
+// as "inreg" like the C/C++ compilers for the platforms.
+// x86 only.
+
+// compile-flags: --target i686-unknown-linux-gnu -O -C no-prepopulate-passes
+// needs-llvm-components: x86
+
+#![crate_type = "lib"]
+#![no_core]
+#![feature(no_core, lang_items)]
+
+#[lang = "sized"]
+trait Sized {}
+#[lang = "copy"]
+trait Copy {}
+
+pub mod tests {
+    // CHECK: @f1(i32 inreg noundef %_1, i32 inreg noundef %_2, i32 noundef %_3)
+    #[no_mangle]
+    pub extern "fastcall" fn f1(_: i32, _: i32, _: i32) {}
+
+    // CHECK: @f2({{i32\*|ptr}} inreg noundef %_1, {{i32\*|ptr}} inreg noundef %_2, {{i32\*|ptr}} noundef %_3)
+    #[no_mangle]
+    pub extern "fastcall" fn f2(_: *const i32, _: *const i32, _: *const i32) {}
+
+    // CHECK: @f3(float noundef %_1, i32 inreg noundef %_2, i32 inreg noundef %_3, i32 noundef %_4)
+    #[no_mangle]
+    pub extern "fastcall" fn f3(_: f32, _: i32, _: i32, _: i32) {}
+
+    // CHECK: @f4(i32 inreg noundef %_1, float noundef %_2, i32 inreg noundef %_3, i32 noundef %_4)
+    #[no_mangle]
+    pub extern "fastcall" fn f4(_: i32, _: f32, _: i32, _: i32) {}
+
+    // CHECK: @f5(i64 noundef %_1, i32 noundef %_2)
+    #[no_mangle]
+    pub extern "fastcall" fn f5(_: i64, _: i32) {}
+
+    // CHECK: @f6(i1 inreg noundef zeroext %_1, i32 inreg noundef %_2, i32 noundef %_3)
+    #[no_mangle]
+    pub extern "fastcall" fn f6(_: bool, _: i32, _: i32) {}
+}