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

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Merged
merged 2 commits into from
Sep 23, 2025
Merged

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

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11177f6
[LTO][Pipeline][Coro] Add missing coroutine passes to O0 post-link Th…
NewSigma Sep 15, 2025
11d7c92
Restore GlobalDCE
NewSigma Sep 22, 2025
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1 change: 1 addition & 0 deletions llvm/lib/Passes/PassBuilderPipelines.cpp
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Expand Up @@ -1816,6 +1816,7 @@ 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.
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1 change: 1 addition & 0 deletions llvm/test/Other/new-pm-O0-defaults.ll
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Expand Up @@ -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]
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