Rustup to rustc 1.40.0-nightly (787005079 2019-10-04)

patches/0003-Disable-inline-assembly-in-libcore.patch

@@ -25,25 +25,5 @@ index ad5a207..04712b8 100644
      }
 +    */
  }
-diff --git a/src/libcore/hint.rs b/src/libcore/hint.rs
-index ce35181..7d3f6a5 100644
---- a/src/libcore/hint.rs
-+++ b/src/libcore/hint.rs
-@@ -128,6 +128,7 @@ pub fn black_box<T>(dummy: T) -> T {
-     // this. LLVM's intepretation of inline assembly is that it's, well, a black
-     // box. This isn't the greatest implementation since it probably deoptimizes
-     // more than we want, but it's so far good enough.
-+/*
-     #[cfg(not(any(
-         target_arch = "asmjs",
-         all(
-@@ -139,6 +140,7 @@ pub fn black_box<T>(dummy: T) -> T {
-         asm!("" : : "r"(&dummy));
-         return dummy;
-     }
-+*/
- 
-     // Not all platforms support inline assembly so try to do something without
-     // inline assembly which in theory still hinders at least some optimizations
 -- 
 2.17.2 (Apple Git-113)

src/base.rs

@@ -536,6 +536,12 @@ fn trans_stmt<'tcx>(
                 asm_str_style: _,
             } = asm;
             match &*asm_code.as_str() {
+                "" => {
+                    assert_eq!(inputs, &[Name::intern("r")]);
+                    assert!(outputs.is_empty(), "{:?}", outputs);
+
+                    // Black box
+                }
                 "cpuid" | "cpuid\n" => {
                     assert_eq!(inputs, &[Name::intern("{eax}"), Name::intern("{ecx}")]);