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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - New Pass Manager loop passes can't get cached OptimizationRemarkEmitter when invalidated by earlier loop pass"
href="https://bugs.llvm.org/show_bug.cgi?id=37342">37342</a>
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<th>Summary</th>
<td>New Pass Manager loop passes can't get cached OptimizationRemarkEmitter when invalidated by earlier loop pass
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>tejohnson@google.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>I hit the following error when trying to use pass remarks with hotness:
LLVM ERROR: LICM: OptimizationRemarkEmitterAnalysis not cached at a higher
level
from LICMPass, which is trying to get it as cached analysis.
There was a fix done in r292058 to try to keep this analysis valid, however,
that doesn't work if a prior loop pass invalidated it. In my case, it was being
invalidated by LoopSimplifyPass.
I reproduced this by running a loop simplification test with new options:
opt test/Transforms/LoopSimplify/basictest.ll -disable-output
-aa-pipeline=basic-aa 2>&1
-passes='require<opt-remark-emit>,invalidate<block-freq>,require<opt-remark-emit>,loop(licm)'
-debug-pass-manager -pass-remarks=licm -pass-remarks-with-hotness
(i.e. the same options being run in the test added for r292058). The tail end
of the output is:
...
Invalidating analysis: OptimizationRemarkEmitterAnalysis on test
Running pass: RequireAnalysisPass<llvm::OptimizationRemarkEmitterAnalysis,
llvm::Function, llvm::AnalysisManager<llvm::Function>> on test
Running analysis: OptimizationRemarkEmitterAnalysis on test
Running analysis: BlockFrequencyAnalysis on test
Running pass: FunctionToLoopPassAdaptor<llvm::PassManager<llvm::Loop,
LoopAnalysisManager, llvm::LoopStandardAnalysisResults &, llvm::LPMUpdater &> >
on test
Starting llvm::Function pass manager run.
Running pass: LoopSimplifyPass on test
Running analysis: AssumptionAnalysis on test
Invalidating all non-preserved analyses for: test
Invalidating analysis: BranchProbabilityAnalysis on test
Invalidating analysis: BlockFrequencyAnalysis on test
Invalidating analysis: OptimizationRemarkEmitterAnalysis on test
Running pass: LCSSAPass on test
Finished llvm::Function pass manager run.
Running analysis: AAManager on test
Running analysis: BasicAA on test
Running analysis: ScalarEvolutionAnalysis on test
Running analysis: TargetIRAnalysis on test
Running analysis: InnerAnalysisManagerProxy<LoopAnalysisManager,
llvm::Function> on test
Starting Loop pass manager run.
Running pass: LICMPass on Loop at depth 1 containing: %bb3<header><latch>
Running analysis: OuterAnalysisManagerProxy<FunctionAnalysisManager,
llvm::Loop, llvm::LoopStandardAnalysisResults &> on bb3
LLVM ERROR: LICM: OptimizationRemarkEmitterAnalysis not cached at a higher
level
Not sure how this is supposed to work or should be fixed.</pre>
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