Rollup merge of #69579 - petrochenkov:noprevspan, r=Centril

[rust.git] / src / librustc_codegen_llvm / back / lto.rs

diff --git a/src/librustc_codegen_llvm/back/lto.rs b/src/librustc_codegen_llvm/back/lto.rs
index 76a6ffbb1c5b2049cf6620166288b53bb51d38fb..a39c25f6693c1cb56ed2aa05314b2e07957f2037 100644 (file)
--- a/src/librustc_codegen_llvm/back/lto.rs
+++ b/src/librustc_codegen_llvm/back/lto.rs
@@ -237,7 +237,7 @@ fn fat_lto(
     let module: ModuleCodegen<ModuleLlvm> = match costliest_module {
         Some((_cost, i)) => in_memory.remove(i),
         None => {
-            assert!(serialized_modules.len() > 0, "must have at least one serialized module");
+            assert!(!serialized_modules.is_empty(), "must have at least one serialized module");
             let (buffer, name) = serialized_modules.remove(0);
             info!("no in-memory regular modules to choose from, parsing {:?}", name);
             ModuleCodegen {
@@ -584,6 +584,20 @@ pub(crate) fn run_pass_manager(
     //      tools/lto/LTOCodeGenerator.cpp
     debug!("running the pass manager");
     unsafe {
+        if write::should_use_new_llvm_pass_manager(config) {
+            let opt_stage = if thin { llvm::OptStage::ThinLTO } else { llvm::OptStage::FatLTO };
+            let opt_level = config.opt_level.unwrap_or(config::OptLevel::No);
+            // See comment below for why this is necessary.
+            let opt_level = if let config::OptLevel::No = opt_level {
+                config::OptLevel::Less
+            } else {
+                opt_level
+            };
+            write::optimize_with_new_llvm_pass_manager(cgcx, module, config, opt_level, opt_stage);
+            debug!("lto done");
+            return;
+        }
+
         let pm = llvm::LLVMCreatePassManager();
         llvm::LLVMAddAnalysisPasses(module.module_llvm.tm, pm);
 
@@ -903,7 +917,7 @@ fn load_from_file(path: &Path) -> io::Result<ThinLTOImports> {
             if line.is_empty() {
                 let importing_module = current_module.take().expect("Importing module not set");
                 imports.insert(importing_module, mem::replace(&mut current_imports, vec![]));
-            } else if line.starts_with(" ") {
+            } else if line.starts_with(' ') {
                 // Space marks an imported module
                 assert_ne!(current_module, None);
                 current_imports.push(line.trim().to_string());