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e59e4b3dc5
the latter to the Transforms library. While the loop PM uses an analysis to form the IR units, the current plan is to have the PM itself establish and enforce both loop simplified form and LCSSA. This would be a layering violation in the analysis library. Fundamentally, the idea behind the loop PM is to *transform* loops in addition to running passes over them, so it really seemed like the most natural place to sink this was into the transforms library. We can't just move *everything* because we also have loop analyses that rely on a subset of the invariants. So this patch splits the the loop infrastructure into the analysis management that has to be part of the analysis library, and the transform-aware pass manager. This also required splitting the loop analyses' printer passes out to the transforms library, which makes sense to me as running these will transform the code into LCSSA in theory. I haven't split the unittest though because testing one component without the other seems nearly intractable. Differential Revision: https://reviews.llvm.org/D28452 llvm-svn: 291662
120 lines
4.0 KiB
C++
120 lines
4.0 KiB
C++
//===- NewPMDriver.cpp - Driver for opt with new PM -----------------------===//
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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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/// \file
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///
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/// This file is just a split of the code that logically belongs in opt.cpp but
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/// that includes the new pass manager headers.
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///
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//===----------------------------------------------------------------------===//
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#include "NewPMDriver.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Analysis/CGSCCPassManager.h"
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#include "llvm/Bitcode/BitcodeWriterPass.h"
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#include "llvm/IR/Dominators.h"
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#include "llvm/IR/IRPrintingPasses.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/Passes/PassBuilder.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Transforms/Scalar/LoopPassManager.h"
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using namespace llvm;
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using namespace opt_tool;
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static cl::opt<bool>
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DebugPM("debug-pass-manager", cl::Hidden,
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cl::desc("Print pass management debugging information"));
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// This flag specifies a textual description of the alias analysis pipeline to
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// use when querying for aliasing information. It only works in concert with
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// the "passes" flag above.
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static cl::opt<std::string>
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AAPipeline("aa-pipeline",
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cl::desc("A textual description of the alias analysis "
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"pipeline for handling managed aliasing queries"),
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cl::Hidden);
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bool llvm::runPassPipeline(StringRef Arg0, Module &M,
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TargetMachine *TM, tool_output_file *Out,
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StringRef PassPipeline, OutputKind OK,
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VerifierKind VK,
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bool ShouldPreserveAssemblyUseListOrder,
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bool ShouldPreserveBitcodeUseListOrder,
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bool EmitSummaryIndex, bool EmitModuleHash) {
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PassBuilder PB(TM);
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// Specially handle the alias analysis manager so that we can register
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// a custom pipeline of AA passes with it.
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AAManager AA;
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if (!PB.parseAAPipeline(AA, AAPipeline)) {
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errs() << Arg0 << ": unable to parse AA pipeline description.\n";
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return false;
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}
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LoopAnalysisManager LAM(DebugPM);
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FunctionAnalysisManager FAM(DebugPM);
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CGSCCAnalysisManager CGAM(DebugPM);
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ModuleAnalysisManager MAM(DebugPM);
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// Register the AA manager first so that our version is the one used.
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FAM.registerPass([&] { return std::move(AA); });
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// Register all the basic analyses with the managers.
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PB.registerModuleAnalyses(MAM);
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PB.registerCGSCCAnalyses(CGAM);
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PB.registerFunctionAnalyses(FAM);
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PB.registerLoopAnalyses(LAM);
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PB.crossRegisterProxies(LAM, FAM, CGAM, MAM);
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ModulePassManager MPM(DebugPM);
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if (VK > VK_NoVerifier)
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MPM.addPass(VerifierPass());
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if (!PB.parsePassPipeline(MPM, PassPipeline, VK == VK_VerifyEachPass,
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DebugPM)) {
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errs() << Arg0 << ": unable to parse pass pipeline description.\n";
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return false;
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}
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if (VK > VK_NoVerifier)
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MPM.addPass(VerifierPass());
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// Add any relevant output pass at the end of the pipeline.
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switch (OK) {
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case OK_NoOutput:
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break; // No output pass needed.
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case OK_OutputAssembly:
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MPM.addPass(
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PrintModulePass(Out->os(), "", ShouldPreserveAssemblyUseListOrder));
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break;
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case OK_OutputBitcode:
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MPM.addPass(BitcodeWriterPass(Out->os(), ShouldPreserveBitcodeUseListOrder,
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EmitSummaryIndex, EmitModuleHash));
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break;
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}
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// Before executing passes, print the final values of the LLVM options.
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cl::PrintOptionValues();
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// Now that we have all of the passes ready, run them.
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MPM.run(M, MAM);
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// Declare success.
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if (OK != OK_NoOutput)
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Out->keep();
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return true;
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}
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