08dda4dcbf
This patch does two things: 1. It implements an ephemeral values cache analysis pass that collects the ephemeral values of a function and caches them for fast lookups. The collection of the ephemeral values is done lazily when the user calls `EphemeralValuesCache::ephValues()`. 2. It adds caching of ephemeral values using the `EphemeralValuesCache` to speed up `CallAnalyzer::analyze()`. Without caching this can take a long time to run in cases where the function contains a large number of `@llvm.assume()` calls and a large number of callsites. The time is spent in `collectEphemeralvalues()`.
29 lines
905 B
C++
29 lines
905 B
C++
//===- EphemeralValuesCache.cpp - Cache collecting ephemeral values -------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/EphemeralValuesCache.h"
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#include "llvm/Analysis/AssumptionCache.h"
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#include "llvm/Analysis/CodeMetrics.h"
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namespace llvm {
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void EphemeralValuesCache::collectEphemeralValues() {
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CodeMetrics::collectEphemeralValues(&F, &AC, EphValues);
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Collected = true;
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}
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AnalysisKey EphemeralValuesAnalysis::Key;
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EphemeralValuesCache
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EphemeralValuesAnalysis::run(Function &F, FunctionAnalysisManager &FAM) {
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auto &AC = FAM.getResult<AssumptionAnalysis>(F);
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return EphemeralValuesCache(F, AC);
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}
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} // namespace llvm
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