tests/run-make/simd-ffi: use a generic LLVM intrinsics ...

... to do more comprehensive type checking

Author: liushuyu

tests/run-make/simd-ffi/simd.rs

@@ -25,7 +25,7 @@ pub struct i32x4([i32; 4]);
 
 extern "C" {
     // _mm_sll_epi32
-    #[cfg(all(any(target_arch = "x86", target_arch = "x86-64"), target_feature = "sse2"))]
+    #[cfg(any(all(target_arch = "x86", target_feature = "sse2"), target_arch = "x86-64"))]
     #[link_name = "llvm.x86.sse2.psll.d"]
     fn integer(a: i32x4, b: i32x4) -> i32x4;
 
@@ -38,15 +38,14 @@ extern "C" {
     #[link_name = "llvm.aarch64.neon.maxs.v4i32"]
     fn integer(a: i32x4, b: i32x4) -> i32x4;
 
-    // just some substitute foreign symbol, not an LLVM intrinsic; so
-    // we still get type checking, but not as detailed as (ab)using
-    // LLVM.
+    // Use a generic LLVM intrinsic to do type checking on other platforms
     #[cfg(not(any(
         all(target_arch = "x86", target_feature = "sse2"),
         target_arch = "x86-64",
         target_arch = "arm",
         target_arch = "aarch64"
     )))]
+    #[link_name = "llvm.smax.v4i32"]
     fn integer(a: i32x4, b: i32x4) -> i32x4;
 }