add vector ABI check test for calling extern fn

Author: RalfJung

tests/ui/simd-abi-checks.rs

@@ -4,7 +4,7 @@
 
 #![feature(avx512_target_feature)]
 #![feature(portable_simd)]
-#![feature(target_feature_11)]
+#![feature(target_feature_11, simd_ffi)]
 #![allow(improper_ctypes_definitions)]
 
 use std::arch::x86_64::*;
@@ -91,4 +91,20 @@ fn main() {
     unsafe {
         in_closure()();
     }
+
+    unsafe {
+        #[expect(improper_ctypes)]
+        extern "C" {
+            fn some_extern() -> __m256;
+        }
+        some_extern();
+        //~^ WARNING this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
+        //~| WARNING this was previously accepted by the compiler
+    }
+}
+
+#[no_mangle]
+#[target_feature(enable = "avx")]
+fn some_extern() -> __m256 {
+    todo!()
 }

tests/ui/simd-abi-checks.stderr

@@ -59,6 +59,16 @@ LL |         w(Wrapper(g()));
    = note: for more information, see issue #116558 <https://github.com/rust-lang/rust/issues/116558>
    = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
 
+warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
+  --> $DIR/simd-abi-checks.rs:100:9
+   |
+LL |         some_extern();
+   |         ^^^^^^^^^^^^^ function called here
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #116558 <https://github.com/rust-lang/rust/issues/116558>
+   = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
+
 warning: this function definition uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled
   --> $DIR/simd-abi-checks.rs:27:1
    |
@@ -99,11 +109,11 @@ LL |     || g()
    = note: for more information, see issue #116558 <https://github.com/rust-lang/rust/issues/116558>
    = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
 
-warning: 10 warnings emitted
+warning: 11 warnings emitted
 
 Future incompatibility report: Future breakage diagnostic:
 warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
-  --> $DIR/simd-abi-checks.rs:55:11
+  --> $DIR/simd-abi-checks.rs:64:11
    |
 LL |         f(g());
    |           ^^^ function called here
@@ -115,7 +125,7 @@ LL |         f(g());
 
 Future breakage diagnostic:
 warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
-  --> $DIR/simd-abi-checks.rs:55:9
+  --> $DIR/simd-abi-checks.rs:64:9
    |
 LL |         f(g());
    |         ^^^^^^ function called here
@@ -127,7 +137,7 @@ LL |         f(g());
 
 Future breakage diagnostic:
 warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
-  --> $DIR/simd-abi-checks.rs:63:14
+  --> $DIR/simd-abi-checks.rs:72:14
    |
 LL |         gavx(favx());
    |              ^^^^^^ function called here
@@ -139,7 +149,7 @@ LL |         gavx(favx());
 
 Future breakage diagnostic:
 warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
-  --> $DIR/simd-abi-checks.rs:63:9
+  --> $DIR/simd-abi-checks.rs:72:9
    |
 LL |         gavx(favx());
    |         ^^^^^^^^^^^^ function called here
@@ -151,7 +161,7 @@ LL |         gavx(favx());
 
 Future breakage diagnostic:
 warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
-  --> $DIR/simd-abi-checks.rs:75:19
+  --> $DIR/simd-abi-checks.rs:84:19
    |
 LL |         w(Wrapper(g()));
    |                   ^^^ function called here
@@ -163,7 +173,7 @@ LL |         w(Wrapper(g()));
 
 Future breakage diagnostic:
 warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
-  --> $DIR/simd-abi-checks.rs:75:9
+  --> $DIR/simd-abi-checks.rs:84:9
    |
 LL |         w(Wrapper(g()));
    |         ^^^^^^^^^^^^^^^ function called here
@@ -173,9 +183,21 @@ LL |         w(Wrapper(g()));
    = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
    = note: `#[warn(abi_unsupported_vector_types)]` on by default
 
+Future breakage diagnostic:
+warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
+  --> $DIR/simd-abi-checks.rs:100:9
+   |
+LL |         some_extern();
+   |         ^^^^^^^^^^^^^ function called here
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #116558 <https://github.com/rust-lang/rust/issues/116558>
+   = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
+   = note: `#[warn(abi_unsupported_vector_types)]` on by default
+
 Future breakage diagnostic:
 warning: this function definition uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled
-  --> $DIR/simd-abi-checks.rs:26:1
+  --> $DIR/simd-abi-checks.rs:27:1
    |
 LL | unsafe extern "C" fn g() -> __m256 {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here
@@ -187,7 +209,7 @@ LL | unsafe extern "C" fn g() -> __m256 {
 
 Future breakage diagnostic:
 warning: this function definition uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled
-  --> $DIR/simd-abi-checks.rs:20:1
+  --> $DIR/simd-abi-checks.rs:21:1
    |
 LL | unsafe extern "C" fn f(_: __m256) {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here
@@ -199,7 +221,7 @@ LL | unsafe extern "C" fn f(_: __m256) {
 
 Future breakage diagnostic:
 warning: this function definition uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled
-  --> $DIR/simd-abi-checks.rs:14:1
+  --> $DIR/simd-abi-checks.rs:15:1
    |
 LL | unsafe extern "C" fn w(_: Wrapper) {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here
@@ -209,3 +231,15 @@ LL | unsafe extern "C" fn w(_: Wrapper) {
    = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
    = note: `#[warn(abi_unsupported_vector_types)]` on by default
 
+Future breakage diagnostic:
+warning: this function call uses a SIMD vector type that (with the chosen ABI) requires the `avx` target feature, which is not enabled in the caller
+  --> $DIR/simd-abi-checks.rs:57:8
+   |
+LL |     || g()
+   |        ^^^ function called here
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #116558 <https://github.com/rust-lang/rust/issues/116558>
+   = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`)
+   = note: `#[warn(abi_unsupported_vector_types)]` on by default
+