[gcc r15-8605] gccrs: add two more tests to test try-catch (unwind) code generation

[Arthur Cohen]

https://gcc.gnu.org/g:5b7583c68aa4ec1b51d83f892744ffa44ec4a605

commit r15-8605-g5b7583c68aa4ec1b51d83f892744ffa44ec4a605
Author: liushuyu <liushuyu011@gmail.com>
Date:   Mon Dec 2 14:52:35 2024 -0700

    gccrs: add two more tests to test try-catch (unwind) code generation
    
    gcc/testsuite/ChangeLog:
            * rust/compile/try-catch-unwind-old.rs: add a test to test the older
            try intrinsics from plain old Rust to v1.78.0
            * rust/compile/try-catch-unwind-new.rs: add a test to test the newer
            catch_unwind instrinsics since Rust v1.78.0

Diff:
---
 gcc/testsuite/rust/compile/try-catch-unwind-new.rs | 20 ++++++++++++++++++++
 gcc/testsuite/rust/compile/try-catch-unwind-old.rs | 21 +++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/gcc/testsuite/rust/compile/try-catch-unwind-new.rs b/gcc/testsuite/rust/compile/try-catch-unwind-new.rs
new file mode 100644
index 000000000000..b176f7a100ba
--- /dev/null
+++ b/gcc/testsuite/rust/compile/try-catch-unwind-new.rs
@@ -0,0 +1,20 @@
+// { dg-options "-O2 -w -fdump-tree-optimized" }
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+    // { dg-final { scan-tree-dump-times "__builtin_eh_pointer" 1 "optimized" } }
+    fn catch_unwind(try_fn: fn(_: *mut u8), data: *mut u8, catch_fn: fn(_: *mut u8, _: *mut u8));
+}
+
+extern "C" {
+    fn try_fn(data: *mut u8);
+    fn catch_fn(data: *mut u8, ex: *mut u8);
+}
+
+pub fn not_main(d: &mut u8) {
+    unsafe {
+        // { dg-final { scan-tree-dump-times "try_fn" 1 "optimized" } }
+        catch_unwind(try_fn, d, catch_fn);
+        // { dg-final { scan-tree-dump-times "catch_fn" 1 "optimized" } }
+    }
+}
diff --git a/gcc/testsuite/rust/compile/try-catch-unwind-old.rs b/gcc/testsuite/rust/compile/try-catch-unwind-old.rs
new file mode 100644
index 000000000000..e97d52cd64e3
--- /dev/null
+++ b/gcc/testsuite/rust/compile/try-catch-unwind-old.rs
@@ -0,0 +1,21 @@
+// { dg-options "-O2 -w -fdump-tree-optimized" }
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+    // { dg-final { scan-tree-dump-times "__builtin_eh_pointer" 1 "optimized" } }
+    fn r#try(try_fn: fn(_: *mut u8), data: *mut u8, catch_fn: fn(_: *mut u8, _: *mut u8)) -> i32;
+}
+
+extern "C" {
+    fn try_fn(data: *mut u8);
+    fn catch_fn(data: *mut u8, ex: *mut u8);
+}
+
+pub fn not_main(d: &mut u8) -> i32 {
+    unsafe {
+        // { dg-final { scan-tree-dump-times "try_fn" 1 "optimized" } }
+        let _: i32 = r#try(try_fn, d, catch_fn);
+        // { dg-final { scan-tree-dump-times "catch_fn" 1 "optimized" } }
+    }
+    42
+}