1 files changed, 70 insertions, 0 deletions
diff --git a/tests/assembly-llvm/regparm-module-flag.rs b/tests/assembly-llvm/regparm-module-flag.rs
new file mode 100644
index 00000000000..67ef44285ea
--- /dev/null
+++ b/tests/assembly-llvm/regparm-module-flag.rs
@@ -0,0 +1,70 @@
+// Test the regparm ABI with builtin and non-builtin calls
+// Issue: https://github.com/rust-lang/rust/issues/145271
+//@ add-core-stubs
+//@ assembly-output: emit-asm
+//@ compile-flags: -O --target=i686-unknown-linux-gnu -Crelocation-model=static
+//@ revisions: REGPARM1 REGPARM2 REGPARM3
+//@[REGPARM1] compile-flags: -Zregparm=1
+//@[REGPARM2] compile-flags: -Zregparm=2
+//@[REGPARM3] compile-flags: -Zregparm=3
+//@ needs-llvm-components: x86
+#![feature(no_core)]
+#![no_std]
+#![no_core]
+#![crate_type = "lib"]
+
+extern crate minicore;
+use minicore::*;
+
+unsafe extern "C" {
+    fn memset(p: *mut c_void, val: i32, len: usize) -> *mut c_void;
+    fn non_builtin_memset(p: *mut c_void, val: i32, len: usize) -> *mut c_void;
+}
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn entrypoint(len: usize, ptr: *mut c_void, val: i32) -> *mut c_void {
+    // REGPARM1-LABEL: entrypoint
+    // REGPARM1: movl %e{{.*}}, %ecx
+    // REGPARM1: pushl
+    // REGPARM1: pushl
+    // REGPARM1: calll memset
+
+    // REGPARM2-LABEL: entrypoint
+    // REGPARM2: movl 16(%esp), %edx
+    // REGPARM2: movl %e{{.*}}, (%esp)
+    // REGPARM2: movl %e{{.*}}, %eax
+    // REGPARM2: calll memset
+
+    // REGPARM3-LABEL: entrypoint
+    // REGPARM3: movl %e{{.*}}, %esi
+    // REGPARM3: movl %e{{.*}}, %eax
+    // REGPARM3: movl %e{{.*}}, %ecx
+    // REGPARM3: jmp memset
+    unsafe { memset(ptr, val, len) }
+}
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn non_builtin_entrypoint(
+    len: usize,
+    ptr: *mut c_void,
+    val: i32,
+) -> *mut c_void {
+    // REGPARM1-LABEL: non_builtin_entrypoint
+    // REGPARM1: movl %e{{.*}}, %ecx
+    // REGPARM1: pushl
+    // REGPARM1: pushl
+    // REGPARM1: calll non_builtin_memset
+
+    // REGPARM2-LABEL: non_builtin_entrypoint
+    // REGPARM2: movl 16(%esp), %edx
+    // REGPARM2: movl %e{{.*}}, (%esp)
+    // REGPARM2: movl %e{{.*}}, %eax
+    // REGPARM2: calll non_builtin_memset
+
+    // REGPARM3-LABEL: non_builtin_entrypoint
+    // REGPARM3: movl %e{{.*}}, %esi
+    // REGPARM3: movl %e{{.*}}, %eax
+    // REGPARM3: movl %e{{.*}}, %ecx
+    // REGPARM3: jmp non_builtin_memset
+    unsafe { non_builtin_memset(ptr, val, len) }
+}