codegen_llvm: avoid `Deref` impls w/ extern type

`rustc_codegen_llvm` relied on `Deref` impls where `Deref::Target` was
or contained an extern type - in my experimental implementation of
rust-lang/rfcs#3729, this isn't possible as the `Target` associated
type's `?Sized` bound cannot be relaxed backwards compatibly (unless we
come up with some way of doing this).

In later pull requests with the rust-lang/rfcs#3729 implementation,
breakage like this could only occur for nightly users relying on the
`extern_types` feature.

Upstreaming this to avoid needing to keep carrying this patch locally,
and I think it'll necessarily need to change eventually.

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
index e7952bc95e7..ed8426ae197 100644
--- a/compiler/rustc_codegen_llvm/src/context.rs
+++ b/compiler/rustc_codegen_llvm/src/context.rs
@@ -205,7 +205,7 @@ pub(crate) unsafe fn create_module<'ll>(
     {
         let tm = crate::back::write::create_informational_target_machine(tcx.sess, false);
         unsafe {
-            llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, &tm);
+            llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, tm.raw());
         }
 
         let llvm_data_layout = unsafe { llvm::LLVMGetDataLayoutStr(llmod) };