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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.
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
//===--- MemBehaviorDumper.cpp --------------------------------------------===//
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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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#define DEBUG_TYPE "sil-mem-behavior-dumper"
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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 memory behavior of instructions in a function.
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class MemBehaviorDumper : public SILModuleTransform {
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// To reduce the amount of output, we only dump the memory behavior of
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// selected types of instructions.
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static bool shouldTestInstruction(SILInstruction *I) {
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// Only consider function calls.
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if (FullApplySite::isa(I))
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return true;
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return false;
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}
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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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unsigned PairCount = 0;
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for (auto &BB : Fn) {
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for (auto &I : BB) {
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if (shouldTestInstruction(&I)) {
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// Print the memory behavior in relation to all other values in the
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// function.
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for (auto &V : Values) {
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bool Read = AA->mayReadFromMemory(&I, V);
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bool Write = AA->mayWriteToMemory(&I, V);
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bool SideEffects = AA->mayHaveSideEffects(&I, V);
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llvm::outs() << "PAIR #" << PairCount++ << ".\n"
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<< " " << SILValue(&I) << " " << V
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<< " r=" << Read << ",w=" << Write
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<< ",se=" << SideEffects << "\n";
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}
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}
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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::createMemBehaviorDumper() {
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return new MemBehaviorDumper();
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}
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