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add new flag to print the module post-AD, before opts

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This commit is contained in:
Manuel Drehwald 2025-04-04 14:25:23 -04:00
parent 79e17bc71e
commit 89d8948835
3 changed files with 17 additions and 5 deletions
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12
compiler/rustc_codegen_llvm/src/back/lto.rs
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@ -610,6 +610,8 @@ fn enable_autodiff_settings(ad: &[config::AutoDiff], module: &mut ModuleCodegen<
}
// We handle this below
config::AutoDiff::PrintModAfter => {}
// We handle this below
config::AutoDiff::PrintModFinal => {}
// This is required and already checked
config::AutoDiff::Enable => {}
}
@ -657,14 +659,20 @@ pub(crate) fn run_pass_manager(
}
if cfg!(llvm_enzyme) && enable_ad {
// This is the post-autodiff IR, mainly used for testing and educational purposes.
if config.autodiff.contains(&config::AutoDiff::PrintModAfter) {
unsafe { llvm::LLVMDumpModule(module.module_llvm.llmod()) };
}
let opt_stage = llvm::OptStage::FatLTO;
let stage = write::AutodiffStage::PostAD;
unsafe {
write::llvm_optimize(cgcx, dcx, module, None, config, opt_level, opt_stage, stage)?;
}
// This is the final IR, so people should be able to inspect the optimized autodiff output.
if config.autodiff.contains(&config::AutoDiff::PrintModAfter) {
// This is the final IR, so people should be able to inspect the optimized autodiff output,
// for manual inspection.
if config.autodiff.contains(&config::AutoDiff::PrintModFinal) {
unsafe { llvm::LLVMDumpModule(module.module_llvm.llmod()) };
}
}