Properly handle InlineAsmOperand::SymFn when collecting monomorphized items

Fixes #72484

src/test/ui/asm/sym.rs

@@ -0,0 +1,38 @@
+// no-system-llvm
+// only-x86_64
+// run-pass
+
+#![feature(asm, track_caller)]
+
+extern "C" fn f1() -> i32 {
+    111
+}
+
+// The compiler will generate a shim to hide the caller location parameter.
+#[track_caller]
+fn f2() -> i32 {
+    222
+}
+
+macro_rules! call {
+    ($func:path) => {{
+        let result: i32;
+        unsafe {
+            asm!("call {}", sym $func,
+                out("rax") result,
+                out("rcx") _, out("rdx") _, out("rdi") _, out("rsi") _,
+                out("r8") _, out("r9") _, out("r10") _, out("r11") _,
+                out("xmm0") _, out("xmm1") _, out("xmm2") _, out("xmm3") _,
+                out("xmm4") _, out("xmm5") _, out("xmm6") _, out("xmm7") _,
+                out("xmm8") _, out("xmm9") _, out("xmm10") _, out("xmm11") _,
+                out("xmm12") _, out("xmm13") _, out("xmm14") _, out("xmm15") _,
+            );
+        }
+        result
+    }}
+}
+
+fn main() {
+    assert_eq!(call!(f1), 111);
+    assert_eq!(call!(f2), 222);
+}