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Don't set unnecessary module flag "LTOPostLink"

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This module flag was an internal detail of LLVM's optimization passes, and all
code involving it was removed in LLVM 17.

<200cc952a2>
This commit is contained in:
Zalathar 2024-10-29 15:01:36 +11:00
parent 2df8dbb1b3
commit ba81dbf3c6
3 changed files with 3 additions and 25 deletions
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21
compiler/rustc_codegen_llvm/src/back/lto.rs
View File

@ -25,7 +25,6 @@ use tracing::{debug, info};
use crate::back::write::{
self, CodegenDiagnosticsStage, DiagnosticHandlers, bitcode_section_name, save_temp_bitcode,
};
use crate::common::AsCCharPtr;
use crate::errors::{
DynamicLinkingWithLTO, LlvmError, LtoBitcodeFromRlib, LtoDisallowed, LtoDylib, LtoProcMacro,
};
@ -602,23 +601,9 @@ pub(crate) fn run_pass_manager(
// This code is based off the code found in llvm's LTO code generator:
// llvm/lib/LTO/LTOCodeGenerator.cpp
debug!("running the pass manager");
unsafe {
if !llvm::LLVMRustHasModuleFlag(
module.module_llvm.llmod(),
"LTOPostLink".as_c_char_ptr(),
11,
) {
llvm::LLVMRustAddModuleFlagU32(
module.module_llvm.llmod(),
llvm::LLVMModFlagBehavior::Error,
c"LTOPostLink".as_ptr(),
1,
);
}
let opt_stage = if thin { llvm::OptStage::ThinLTO } else { llvm::OptStage::FatLTO };
let opt_level = config.opt_level.unwrap_or(config::OptLevel::No);
write::llvm_optimize(cgcx, dcx, module, config, opt_level, opt_stage)?;
}
let opt_stage = if thin { llvm::OptStage::ThinLTO } else { llvm::OptStage::FatLTO };
let opt_level = config.opt_level.unwrap_or(config::OptLevel::No);
unsafe { write::llvm_optimize(cgcx, dcx, module, config, opt_level, opt_stage) }?;
debug!("lto done");
Ok(())
}

2
compiler/rustc_codegen_llvm/src/llvm/ffi.rs
View File

@ -1842,8 +1842,6 @@ unsafe extern "C" {
value_len: size_t,
);
pub fn LLVMRustHasModuleFlag(M: &Module, name: *const c_char, len: size_t) -> bool;
pub fn LLVMRustDIBuilderCreate(M: &Module) -> &mut DIBuilder<'_>;
pub fn LLVMRustDIBuilderDispose<'a>(Builder: &'a mut DIBuilder<'a>);

5
compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
View File

@ -867,11 +867,6 @@ extern "C" void LLVMRustAddModuleFlagString(
MDString::get(unwrap(M)->getContext(), StringRef(Value, ValueLen)));
}
extern "C" bool LLVMRustHasModuleFlag(LLVMModuleRef M, const char *Name,
size_t Len) {
return unwrap(M)->getModuleFlag(StringRef(Name, Len)) != nullptr;
}
extern "C" void LLVMRustGlobalAddMetadata(LLVMValueRef Global, unsigned Kind,
LLVMMetadataRef MD) {
unwrap<GlobalObject>(Global)->addMetadata(Kind, *unwrap<MDNode>(MD));