user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Rollup merge of #87916 - nbdd0121:black_box, r=nagisa

Browse source 
Implement `black_box` using intrinsic

Introduce `black_box` intrinsic, as suggested in https://github.com/rust-lang/rust/pull/87590#discussion_r680468700.

This is still codegenned as empty inline assembly for LLVM. For MIR interpretation and cranelift it's treated as identity.

cc `@Amanieu` as this is related to inline assembly
cc `@bjorn3` for rustc_codegen_cranelift changes
cc `@RalfJung` as this affects MIRI

r? `@nagisa` I suppose
This commit is contained in:
Manish Goregaokar 2021-08-12 10:04:07 -07:00 • committed by GitHub
commit df23264f80
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
9 changed files with 52 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/test/ui/sanitize/memory.rs
View file

@ -6,7 +6,7 @@
// run-fail
// error-pattern: MemorySanitizer: use-of-uninitialized-value
// error-pattern: Uninitialized value was created by an allocation
// error-pattern: in the stack frame of function 'random'
// error-pattern: in the stack frame of function 'main'
//
// This test case intentionally limits the usage of the std,
// since it will be linked with an uninstrumented version of it.