Importing rustc-1.56.0

Change-Id: I98941481270706fa55f8fb2cb91686ae3bd30f38
diff --git a/src/test/ui/llvm-asm/llvm-asm-out-read-uninit.rs b/src/test/ui/llvm-asm/llvm-asm-out-read-uninit.rs
index acf4cf9..161add7 100644
--- a/src/test/ui/llvm-asm/llvm-asm-out-read-uninit.rs
+++ b/src/test/ui/llvm-asm/llvm-asm-out-read-uninit.rs
@@ -10,6 +10,7 @@
 // ignore-mips64
 
 #![feature(llvm_asm)]
+#![allow(deprecated)] // llvm_asm!
 
 fn foo(x: isize) { println!("{}", x); }