From e3d113eca91d639c697d925d9de38b5efde70c1b Mon Sep 17 00:00:00 2001 From: kennytm Date: Thu, 28 Jun 2018 06:24:09 +0800 Subject: Do not allow LLVM to increase a TLS's alignment on macOS. --- src/test/codegen/issue-44056-macos-tls-align.rs | 40 +++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/test/codegen/issue-44056-macos-tls-align.rs (limited to 'src/test/codegen') diff --git a/src/test/codegen/issue-44056-macos-tls-align.rs b/src/test/codegen/issue-44056-macos-tls-align.rs new file mode 100644 index 00000000000..3235ef0bb33 --- /dev/null +++ b/src/test/codegen/issue-44056-macos-tls-align.rs @@ -0,0 +1,40 @@ +// Copyright 2018 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// ignore-tidy-linelength +// only-macos +// no-system-llvm +// min-llvm-version 6.0 +// compile-flags: -O + +#![crate_type = "rlib"] +#![feature(thread_local)] + +// CHECK: @STATIC_VAR_1 = internal thread_local unnamed_addr global <{ [32 x i8] }> zeroinitializer, section "__DATA,__thread_bss", align 4 +#[no_mangle] +#[allow(private_no_mangle_statics)] +#[thread_local] +static mut STATIC_VAR_1: [u32; 8] = [0; 8]; + +// CHECK: @STATIC_VAR_2 = internal thread_local unnamed_addr global <{ [32 x i8] }> <{{[^>]*}}>, section "__DATA,__thread_data", align 4 +#[no_mangle] +#[allow(private_no_mangle_statics)] +#[thread_local] +static mut STATIC_VAR_2: [u32; 8] = [4; 8]; + +#[no_mangle] +pub unsafe fn f(x: &mut [u32; 8]) { + std::mem::swap(x, &mut STATIC_VAR_1) +} + +#[no_mangle] +pub unsafe fn g(x: &mut [u32; 8]) { + std::mem::swap(x, &mut STATIC_VAR_2) +} -- cgit 1.4.1-3-g733a5