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Add support for storing code model to LLVM module IR

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This patch avoids undefined behavior by linking different object files.
Also this would it could be propagated properly to LTO.

See https://reviews.llvm.org/D52322 and https://reviews.llvm.org/D52323.

This patch is based on https://github.com/rust-lang/rust/pull/74002
This commit is contained in:
Hiroki Noda 2021-03-12 08:35:13 +09:00
parent 4a8b6f708c
commit 8357e57346
5 changed files with 36 additions and 1 deletions
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compiler/rustc_codegen_llvm/src/llvm/ffi.rs
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@ -2326,6 +2326,7 @@ extern "C" {
pub fn LLVMRustUnsetComdat(V: &Value);
pub fn LLVMRustSetModulePICLevel(M: &Module);
pub fn LLVMRustSetModulePIELevel(M: &Module);
pub fn LLVMRustSetModuleCodeModel(M: &Module, Model: CodeModel);
pub fn LLVMRustModuleBufferCreate(M: &Module) -> &'static mut ModuleBuffer;
pub fn LLVMRustModuleBufferPtr(p: &ModuleBuffer) -> *const u8;
pub fn LLVMRustModuleBufferLen(p: &ModuleBuffer) -> usize;