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Rollup merge of #137549 - oli-obk:llvm-ffi, r=davidtwco

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Clean up various LLVM FFI things in codegen_llvm

cc ```@ZuseZ4``` I touched some autodiff parts

The major change of this PR is [bfd88ce](https://github.com/rust-lang/rust/pull/137549/commits/bfd88cead0dd79717f123ad7e9a26ecad88653cb) which makes `CodegenCx` generic just like `GenericBuilder`

The other commits mostly took advantage of the new feature of making extern functions safe, but also just used some wrappers that were already there and shrunk unsafe blocks.

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This commit is contained in:
Matthias Krüger 2025-03-07 19:15:34 +01:00 • committed by GitHub
commit 63c548d82c
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26 changed files with 336 additions and 368 deletions
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7
compiler/rustc_codegen_llvm/src/lib.rs
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@ -28,6 +28,7 @@ use std::mem::ManuallyDrop;
use back::owned_target_machine::OwnedTargetMachine;
use back::write::{create_informational_target_machine, create_target_machine};
use context::SimpleCx;
use errors::{AutoDiffWithoutLTO, ParseTargetMachineConfig};
pub(crate) use llvm_util::target_features_cfg;
use rustc_ast::expand::allocator::AllocatorKind;
@ -115,9 +116,11 @@ impl ExtraBackendMethods for LlvmCodegenBackend {
kind: AllocatorKind,
alloc_error_handler_kind: AllocatorKind,
) -> ModuleLlvm {
let mut module_llvm = ModuleLlvm::new_metadata(tcx, module_name);
let module_llvm = ModuleLlvm::new_metadata(tcx, module_name);
let cx =
SimpleCx::new(module_llvm.llmod(), &module_llvm.llcx, tcx.data_layout.pointer_size);
unsafe {
allocator::codegen(tcx, &mut module_llvm, module_name, kind, alloc_error_handler_kind);
allocator::codegen(tcx, cx, module_name, kind, alloc_error_handler_kind);
}
module_llvm
}