Rollup merge of #88820 - hlopko:add_pie_relocation_model, r=petrochenkov

Add `pie` as another `relocation-model` value

MCP: https://github.com/rust-lang/compiler-team/issues/461

2 files changed, 38 insertions, 0 deletions

diff --git a/src/test/codegen/pic-relocation-model.rs b/src/test/codegen/pic-relocation-model.rs
new file mode 100644
index 00000000000..6e1d5a6c3f2
--- /dev/null
+++ b/src/test/codegen/pic-relocation-model.rs
@@ -0,0 +1,16 @@
+// compile-flags: -C relocation-model=pic
+
+#![crate_type = "rlib"]
+
+// CHECK: define i8 @call_foreign_fn()
+#[no_mangle]
+pub fn call_foreign_fn() -> u8 {
+    unsafe {
+        foreign_fn()
+    }
+}
+
+// CHECK: declare zeroext i8 @foreign_fn()
+extern "C" {fn foreign_fn() -> u8;}
+
+// CHECK: !{i32 7, !"PIC Level", i32 2}
diff --git a/src/test/codegen/pie-relocation-model.rs b/src/test/codegen/pie-relocation-model.rs
new file mode 100644
index 00000000000..a843202a94f
--- /dev/null
+++ b/src/test/codegen/pie-relocation-model.rs
@@ -0,0 +1,22 @@
+// compile-flags: -C relocation-model=pie
+// only-x86_64-unknown-linux-gnu
+
+#![crate_type = "rlib"]
+
+// With PIE we know local functions cannot be interpositioned, we can mark them
+// as dso_local.
+// CHECK: define dso_local i8 @call_foreign_fn()
+#[no_mangle]
+pub fn call_foreign_fn() -> u8 {
+    unsafe {
+        foreign_fn()
+    }
+}
+
+// External functions are still marked as non-dso_local, since we don't know if the symbol
+// is defined in the binary or in the shared library.
+// CHECK: declare zeroext i8 @foreign_fn()
+extern "C" {fn foreign_fn() -> u8;}
+
+// CHECK: !{i32 7, !"PIC Level", i32 2}
+// CHECK: !{i32 7, !"PIE Level", i32 2}