From ccf091636fb6801e0f37d6b0f7d62debef727beb Mon Sep 17 00:00:00 2001
From: ecstatic-morse <ecstaticmorse@gmail.com>
Date: Tue, 29 Oct 2019 12:42:50 -0700
Subject: [PATCH] Add `#[rustc_args_required_const]` to `simd_shuffle`

Currently, these have to be special-cased in the promotion logic for rustc.
---
 crates/core_arch/src/simd_llvm.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/crates/core_arch/src/simd_llvm.rs b/crates/core_arch/src/simd_llvm.rs
index 7f18ca8f0f..5b5c6dd0a8 100644
--- a/crates/core_arch/src/simd_llvm.rs
+++ b/crates/core_arch/src/simd_llvm.rs
@@ -10,12 +10,19 @@ extern "platform-intrinsic" {
     pub fn simd_gt<T, U>(x: T, y: T) -> U;
     pub fn simd_ge<T, U>(x: T, y: T) -> U;
 
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle2<T, U>(x: T, y: T, idx: [u32; 2]) -> U;
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle4<T, U>(x: T, y: T, idx: [u32; 4]) -> U;
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle8<T, U>(x: T, y: T, idx: [u32; 8]) -> U;
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle16<T, U>(x: T, y: T, idx: [u32; 16]) -> U;
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle32<T, U>(x: T, y: T, idx: [u32; 32]) -> U;
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle64<T, U>(x: T, y: T, idx: [u32; 64]) -> U;
+    #[rustc_args_required_const(2)]
     pub fn simd_shuffle128<T, U>(x: T, y: T, idx: [u32; 128]) -> U;
 
     pub fn simd_insert<T, U>(x: T, idx: u32, val: U) -> T;