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pattern that triggers it. This essentially requires an immutable function analysis, as that will survive anything we do to invalidate it. When we have such patterns, the function analysis manager will not get cleared between runs of the proxy. If we actually need an assert about how things are queried, we can add more elaborate machinery for computing it, but so far I'm not aware of significant value provided. Thanks to Justin Lebar for noticing this when he made a (seemingly innocuous) change to FunctionAttrs that is enough to trigger it in one test there. Now it is covered by a direct test of the pass manager code. llvm-svn: 261627
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
//===- CGSCCPassManager.cpp - Managing & running CGSCC passes -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/CGSCCPassManager.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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char CGSCCAnalysisManagerModuleProxy::PassID;
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CGSCCAnalysisManagerModuleProxy::Result
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CGSCCAnalysisManagerModuleProxy::run(Module &M) {
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assert(CGAM->empty() && "CGSCC analyses ran prior to the module proxy!");
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return Result(*CGAM);
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}
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CGSCCAnalysisManagerModuleProxy::Result::~Result() {
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// CGAM is cleared in a moved from state where there is nothing to do.
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if (!CGAM)
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return;
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// Clear out the analysis manager if we're being destroyed -- it means we
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// didn't even see an invalidate call when we got invalidated.
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CGAM->clear();
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}
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bool CGSCCAnalysisManagerModuleProxy::Result::invalidate(
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Module &M, const PreservedAnalyses &PA) {
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// If this proxy isn't marked as preserved, then we can't even invalidate
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// individual CGSCC analyses, there may be an invalid set of SCC objects in
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// the cache making it impossible to incrementally preserve them.
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// Just clear the entire manager.
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if (!PA.preserved(ID()))
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CGAM->clear();
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// Return false to indicate that this result is still a valid proxy.
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return false;
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}
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char ModuleAnalysisManagerCGSCCProxy::PassID;
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char FunctionAnalysisManagerCGSCCProxy::PassID;
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FunctionAnalysisManagerCGSCCProxy::Result
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FunctionAnalysisManagerCGSCCProxy::run(LazyCallGraph::SCC &C) {
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return Result(*FAM);
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}
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FunctionAnalysisManagerCGSCCProxy::Result::~Result() {
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// FAM is cleared in a moved from state where there is nothing to do.
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if (!FAM)
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return;
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// Clear out the analysis manager if we're being destroyed -- it means we
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// didn't even see an invalidate call when we got invalidated.
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FAM->clear();
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}
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bool FunctionAnalysisManagerCGSCCProxy::Result::invalidate(
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LazyCallGraph::SCC &C, const PreservedAnalyses &PA) {
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// If this proxy isn't marked as preserved, then we can't even invalidate
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// individual function analyses, there may be an invalid set of Function
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// objects in the cache making it impossible to incrementally preserve them.
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// Just clear the entire manager.
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if (!PA.preserved(ID()))
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FAM->clear();
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// Return false to indicate that this result is still a valid proxy.
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return false;
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}
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char CGSCCAnalysisManagerFunctionProxy::PassID;
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