Move span_invalid_monomorphization_error from cg_llvm to cg_ssa

The associated long diagnostic didn't get registered before

Author: bjorn3

src/librustc_codegen_llvm/error_codes.rs

@@ -20,9 +20,9 @@ use rustc_codegen_ssa::common::{IntPredicate, TypeKind};
 use rustc::hir;
 use syntax::ast::{self, FloatTy};
 
+use rustc_codegen_ssa::common::span_invalid_monomorphization_error;
 use rustc_codegen_ssa::traits::*;
 
-use rustc::session::Session;
 use syntax_pos::Span;
 
 use std::cmp::Ordering;
@@ -1026,10 +1026,6 @@ fn get_rust_try_fn<'ll, 'tcx>(
     rust_try
 }
 
-fn span_invalid_monomorphization_error(a: &Session, b: Span, c: &str) {
-    span_err!(a, b, E0511, "{}", c);
-}
-
 fn generic_simd_intrinsic(
     bx: &mut Builder<'a, 'll, 'tcx>,
     name: &str,

src/librustc_codegen_llvm/intrinsic.rs

@@ -38,7 +38,7 @@ extern crate rustc_fs_util;
 extern crate rustc_driver as _;
 
 #[macro_use] extern crate log;
-#[macro_use] extern crate syntax;
+extern crate syntax;
 extern crate syntax_pos;
 extern crate rustc_errors as errors;
 
@@ -64,8 +64,6 @@ use rustc::util::common::ErrorReported;
 use rustc_codegen_ssa::ModuleCodegen;
 use rustc_codegen_utils::codegen_backend::CodegenBackend;
 
-mod error_codes;
-
 mod back {
     pub mod archive;
     pub mod bytecode;

src/librustc_codegen_llvm/lib.rs

@@ -1,6 +1,7 @@
 #![allow(non_camel_case_types, non_snake_case)]
 
 use rustc::ty::{Ty, TyCtxt};
+use rustc::session::Session;
 use syntax_pos::Span;
 
 use rustc::hir::def_id::DefId;
@@ -200,3 +201,7 @@ pub fn shift_mask_val<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
         _ => bug!("shift_mask_val: expected Integer or Vector, found {:?}", kind),
     }
 }
+
+pub fn span_invalid_monomorphization_error(a: &Session, b: Span, c: &str) {
+    span_err!(a, b, E0511, "{}", c);
+}

src/librustc_codegen_ssa/common.rs

@@ -1,5 +1,40 @@
 syntax::register_diagnostics! {
 
+E0511: r##"
+Invalid monomorphization of an intrinsic function was used. Erroneous code
+example:
+
+```ignore (error-emitted-at-codegen-which-cannot-be-handled-by-compile_fail)
+#![feature(platform_intrinsics)]
+
+extern "platform-intrinsic" {
+    fn simd_add<T>(a: T, b: T) -> T;
+}
+
+fn main() {
+    unsafe { simd_add(0, 1); }
+    // error: invalid monomorphization of `simd_add` intrinsic
+}
+```
+
+The generic type has to be a SIMD type. Example:
+
+```
+#![feature(repr_simd)]
+#![feature(platform_intrinsics)]
+
+#[repr(simd)]
+#[derive(Copy, Clone)]
+struct i32x2(i32, i32);
+
+extern "platform-intrinsic" {
+    fn simd_add<T>(a: T, b: T) -> T;
+}
+
+unsafe { simd_add(i32x2(0, 0), i32x2(1, 2)); } // ok!
+```
+"##,
+
 E0668: r##"
 Malformed inline assembly rejected by LLVM.