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be1881aa1f
At some point, pass definitions were heavily macro-ized. Pass descriptive names were added in two places. This is not only redundant but a source of confusion. You could waste a lot of time grepping for the wrong string. I removed all the getName() overrides which, at around 90 passes, was a fairly significant amount of code bloat. Any pass that we want to be able to invoke by name from a tool (sil-opt) or pipeline plan *should* have unique type name, enum value, commend-line string, and name string. I removed a comment about the various inliner passes that contradicted that. Side note: We should be consistent with the policy that a pass is identified by its type. We have a couple passes, LICM and CSE, which currently violate that convention.
105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
//===--- AADumper.cpp - Compare all values in Function with AA ------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This pass collects all values in a function and applies alias analysis to
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/// them. The purpose of this is to enable unit tests for SIL Alias Analysis
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/// implementations independent of any other passes.
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///
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "sil-aa-evaluator"
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#include "swift/SILOptimizer/PassManager/Passes.h"
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#include "swift/SIL/SILArgument.h"
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#include "swift/SIL/SILFunction.h"
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#include "swift/SIL/SILValue.h"
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#include "swift/SILOptimizer/Analysis/AliasAnalysis.h"
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#include "swift/SILOptimizer/Analysis/SideEffectAnalysis.h"
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#include "swift/SILOptimizer/Analysis/Analysis.h"
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#include "swift/SILOptimizer/PassManager/Transforms.h"
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#include "llvm/Support/Debug.h"
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using namespace swift;
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//===----------------------------------------------------------------------===//
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// Value Gatherer
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//===----------------------------------------------------------------------===//
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// Return a list of all instruction values in Fn. Returns true if we have at
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// least two values to compare.
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static bool gatherValues(SILFunction &Fn, std::vector<SILValue> &Values) {
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for (auto &BB : Fn) {
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for (auto *Arg : BB.getArguments())
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Values.push_back(SILValue(Arg));
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for (auto &II : BB)
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if (II.hasValue())
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Values.push_back(&II);
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}
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return Values.size() > 1;
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}
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//===----------------------------------------------------------------------===//
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// Top Level Driver
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//===----------------------------------------------------------------------===//
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namespace {
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/// Dumps the alias relations between all instructions of a function.
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class SILAADumper : public SILModuleTransform {
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void run() override {
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for (auto &Fn: *getModule()) {
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llvm::outs() << "@" << Fn.getName() << "\n";
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// Gather up all Values in Fn.
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std::vector<SILValue> Values;
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if (!gatherValues(Fn, Values))
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continue;
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AliasAnalysis *AA = PM->getAnalysis<AliasAnalysis>();
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// A cache
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llvm::DenseMap<uint64_t, AliasAnalysis::AliasResult> Results;
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// Emit the N^2 alias evaluation of the values.
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unsigned PairCount = 0;
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for (unsigned i1 = 0, e1 = Values.size(); i1 != e1; ++i1) {
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for (unsigned i2 = 0, e2 = Values.size(); i2 != e2; ++i2) {
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auto V1 = Values[i1];
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auto V2 = Values[i2];
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auto Result =
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AA->alias(V1, V2, computeTBAAType(V1), computeTBAAType(V2));
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// Results should always be the same. But if they are different print
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// it out so we find the error. This should make our test results less
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// verbose.
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uint64_t Key = uint64_t(i1) | (uint64_t(i2) << 32);
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uint64_t OpKey = uint64_t(i2) | (uint64_t(i1) << 32);
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auto R = Results.find(OpKey);
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if (R != Results.end() && R->second == Result)
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continue;
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Results[Key] = Result;
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llvm::outs() << "PAIR #" << PairCount++ << ".\n" << V1 << V2 << Result
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<< "\n";
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}
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}
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llvm::outs() << "\n";
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}
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}
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};
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} // end anonymous namespace
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SILTransform *swift::createAADumper() { return new SILAADumper(); }
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