1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
//@ build-pass
//@ compile-flags: --crate-type=rlib --emit=llvm-ir -Cno-prepopulate-passes
// This test declares globals by the same name with different types, which
// caused problems because Module::getOrInsertGlobal would return a Constant*
// bitcast instead of a GlobalVariable* that could access linkage/visibility.
// In alt builds with LLVM assertions this would fail:
//
// rustc: /checkout/src/llvm-project/llvm/include/llvm/Support/Casting.h:269:
// typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = llvm::GlobalValue, Y = llvm::Value]:
// Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
//
// In regular builds, the bad cast was UB, like "Invalid LLVMRustVisibility value!"
#![allow(dropping_copy_types)]
pub mod before {
#[no_mangle]
pub static GLOBAL1: [u8; 1] = [1];
}
pub mod inner {
extern "C" {
pub static GLOBAL1: u8;
pub static GLOBAL2: u8;
}
pub fn call() {
drop(unsafe { (GLOBAL1, GLOBAL2) });
}
}
pub mod after {
#[no_mangle]
pub static GLOBAL2: [u8; 1] = [2];
}
|
