1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/ui/simd/intrinsic/generic-select.rs b/src/test/ui/simd/intrinsic/generic-select.rs
new file mode 100644
index 000000000..248e82ea2
--- /dev/null
+++ b/src/test/ui/simd/intrinsic/generic-select.rs
@@ -0,0 +1,63 @@
+// build-fail
+
+// Test that the simd_select intrinsic produces ok-ish error
+// messages when misused.
+
+#![feature(repr_simd, platform_intrinsics)]
+#![allow(non_camel_case_types)]
+
+#[repr(simd)]
+#[derive(Copy, Clone)]
+pub struct f32x4(pub f32, pub f32, pub f32, pub f32);
+
+#[repr(simd)]
+#[derive(Copy, Clone)]
+pub struct u32x4(pub u32, pub u32, pub u32, pub u32);
+
+#[repr(simd)]
+#[derive(Copy, Clone, PartialEq)]
+struct b8x4(pub i8, pub i8, pub i8, pub i8);
+
+#[repr(simd)]
+#[derive(Copy, Clone, PartialEq)]
+struct b8x8(pub i8, pub i8, pub i8, pub i8, pub i8, pub i8, pub i8, pub i8);
+
+extern "platform-intrinsic" {
+    fn simd_select<T, U>(x: T, a: U, b: U) -> U;
+    fn simd_select_bitmask<T, U>(x: T, a: U, b: U) -> U;
+}
+
+fn main() {
+    let m4 = b8x4(0, 0, 0, 0);
+    let m8 = b8x8(0, 0, 0, 0, 0, 0, 0, 0);
+    let x = u32x4(0, 0, 0, 0);
+    let z = f32x4(0.0, 0.0, 0.0, 0.0);
+
+    unsafe {
+        simd_select(m4, x, x);
+
+        simd_select(m8, x, x);
+        //~^ ERROR mismatched lengths: mask length `8` != other vector length `4`
+
+        simd_select(x, x, x);
+        //~^ ERROR mask element type is `u32`, expected `i_`
+
+        simd_select(z, z, z);
+        //~^ ERROR mask element type is `f32`, expected `i_`
+
+        simd_select(m4, 0u32, 1u32);
+        //~^ ERROR found non-SIMD `u32`
+
+        simd_select_bitmask(0u16, x, x);
+        //~^ ERROR invalid bitmask `u16`, expected `u8` or `[u8; 1]`
+
+        simd_select_bitmask(0u8, 1u32, 2u32);
+        //~^ ERROR found non-SIMD `u32`
+
+        simd_select_bitmask(0.0f32, x, x);
+        //~^ ERROR invalid bitmask `f32`, expected `u8` or `[u8; 1]`
+
+        simd_select_bitmask("x", x, x);
+        //~^ ERROR invalid bitmask `&str`, expected `u8` or `[u8; 1]`
+    }
+}