[llvm] d614027 - [LTO][Pipeline][Coro] Add missing coro pass to O0 post-link thinlto pipeline (#159497)

[via llvm-commits]

Author: Weibo He
Date: 2025-09-23T21:40:05+08:00
New Revision: d6140274f372b7ee8f657ded51519bbd44924f34

URL: https://github.com/llvm/llvm-project/commit/d6140274f372b7ee8f657ded51519bbd44924f34
DIFF: https://github.com/llvm/llvm-project/commit/d6140274f372b7ee8f657ded51519bbd44924f34.diff

LOG: [LTO][Pipeline][Coro] Add missing coro pass to O0 post-link thinlto pipeline (#159497)

Add missing coroutine passes so that coro code can be correctly
compiled.

Fix #155558

Added: 
    

Modified: 
    llvm/lib/Passes/PassBuilderPipelines.cpp
    llvm/test/Other/new-pm-O0-defaults.ll

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 30c6f06be139d..eeb10745ba76a 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1831,6 +1831,7 @@ ModulePassManager PassBuilder::buildThinLTODefaultPipeline(
     // in ICP.
     MPM.addPass(LowerTypeTestsPass(nullptr, nullptr,
                                    lowertypetests::DropTestKind::Assume));
+    MPM.addPass(buildCoroWrapper(ThinOrFullLTOPhase::ThinLTOPostLink));
     // Drop available_externally and unreferenced globals. This is necessary
     // with ThinLTO in order to avoid leaving undefined references to dead
     // globals in the object file.

diff  --git a/llvm/test/Other/new-pm-O0-defaults.ll b/llvm/test/Other/new-pm-O0-defaults.ll
index 81d1ee0df2c5b..278a89261691a 100644
--- a/llvm/test/Other/new-pm-O0-defaults.ll
+++ b/llvm/test/Other/new-pm-O0-defaults.ll
@@ -44,6 +44,7 @@
 ; CHECK-PRE-LINK: Running pass: CanonicalizeAliasesPass
 ; CHECK-PRE-LINK-NEXT: Running pass: NameAnonGlobalPass
 ; CHECK-THINLTO: Running pass: LowerTypeTestsPass
+; CHECK-THINLTO-NEXT: Running pass: CoroConditionalWrapper
 ; CHECK-THINLTO-NEXT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-THINLTO-NEXT: Running pass: GlobalDCEPass
 ; CHECK-LTO: Running pass: CrossDSOCFIPass on [module]