bjoernager/rust
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cg_llvm: Reuse LLVM-C Comdat support

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Migrate `llvm::set_comdat` and `llvm::SetUniqueComdat` to LLVM-C FFI.

Note, now we can call `llvm::set_comdat` only when the target actually
supports adding comdat. As this has no convenient LLVM-C API, we
implement this as `TargetOptions::supports_comdat`.

Co-authored-by: Stuart Cook <Zalathar@users.noreply.github.com>
This commit is contained in:
Jubilee Young 2024-10-18 00:31:28 -07:00
parent 888efe74a3
commit 45d61b0d26
6 changed files with 32 additions and 10 deletions
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5
compiler/rustc_codegen_llvm/src/llvm/ffi.rs
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@ -646,6 +646,7 @@ unsafe extern "C" {
pub type Attribute;
pub type Metadata;
pub type BasicBlock;
pub type Comdat;
}
#[repr(C)]
pub struct Builder<'a>(InvariantOpaque<'a>);
@ -1490,6 +1491,9 @@ unsafe extern "C" {
pub fn LLVMSetUnnamedAddress(Global: &Value, UnnamedAddr: UnnamedAddr);
pub fn LLVMIsAConstantInt(value_ref: &Value) -> Option<&ConstantInt>;
pub fn LLVMGetOrInsertComdat(M: &Module, Name: *const c_char) -> &Comdat;
pub fn LLVMSetComdat(V: &Value, C: &Comdat);
}
#[link(name = "llvm-wrapper", kind = "static")]
@ -2320,7 +2324,6 @@ unsafe extern "C" {
pub fn LLVMRustPositionBuilderAtStart<'a>(B: &Builder<'a>, BB: &'a BasicBlock);
pub fn LLVMRustSetComdat<'a>(M: &'a Module, V: &'a Value, Name: *const c_char, NameLen: size_t);
pub fn LLVMRustSetModulePICLevel(M: &Module);
pub fn LLVMRustSetModulePIELevel(M: &Module);
pub fn LLVMRustSetModuleCodeModel(M: &Module, Model: CodeModel);