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0caccbe952
Summary: It can be useful for tools to be able to retrieve the values of variables declared via STATISTIC() directly without having to emit them and parse them back. Use cases include: * Needing to report specific statistics to a test harness * Wanting to post-process statistics. For example, to produce a percentage of functions that were fully selected by GlobalISel Make this possible by adding llvm::GetStatistics() which returns an iterator_range that can be used to inspect the statistics that have been touched during execution. When statistics are disabled (NDEBUG and not LLVM_ENABLE_STATISTICS) this method will return an empty range. This patch doesn't address the effect of multiple compilations within the same process. In such situations, the statistics will be cumulative for all compilations up to the GetStatistics() call. Reviewers: qcolombet, rtereshin, aditya_nandakumar, bogner Reviewed By: rtereshin, bogner Subscribers: llvm-commits, mgorny Differential Revision: https://reviews.llvm.org/D43901 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326723 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
2.3 KiB
C++
107 lines
2.3 KiB
C++
//===- llvm/unittest/ADT/StatisticTest.cpp - Statistic unit tests ---------===//
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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/ADT/Statistic.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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#define DEBUG_TYPE "unittest"
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STATISTIC(Counter, "Counts things");
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STATISTIC(Counter2, "Counts other things");
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TEST(StatisticTest, Count) {
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EnableStatistics();
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Counter = 0;
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EXPECT_EQ(Counter, 0u);
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Counter++;
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Counter++;
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#if LLVM_ENABLE_STATS
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EXPECT_EQ(Counter, 2u);
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#else
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EXPECT_EQ(Counter, 0u);
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#endif
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}
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TEST(StatisticTest, Assign) {
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EnableStatistics();
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Counter = 2;
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#if LLVM_ENABLE_STATS
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EXPECT_EQ(Counter, 2u);
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#else
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EXPECT_EQ(Counter, 0u);
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#endif
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}
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TEST(StatisticTest, API) {
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EnableStatistics();
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Counter = 0;
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EXPECT_EQ(Counter, 0u);
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Counter++;
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Counter++;
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#if LLVM_ENABLE_STATS
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EXPECT_EQ(Counter, 2u);
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#else
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EXPECT_EQ(Counter, 0u);
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#endif
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#if LLVM_ENABLE_STATS
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const auto Range1 = GetStatistics();
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EXPECT_NE(Range1.begin(), Range1.end());
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EXPECT_EQ(Range1.begin() + 1, Range1.end());
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Optional<std::pair<StringRef, unsigned>> S1;
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Optional<std::pair<StringRef, unsigned>> S2;
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for (const auto &S : Range1) {
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if (std::string(S.first) == "Counter")
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S1 = S;
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if (std::string(S.first) == "Counter2")
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S2 = S;
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}
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EXPECT_NE(S1.hasValue(), false);
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EXPECT_EQ(S2.hasValue(), false);
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// Counter2 will be registered when it's first touched.
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Counter2++;
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const auto Range2 = GetStatistics();
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EXPECT_NE(Range2.begin(), Range2.end());
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EXPECT_EQ(Range2.begin() + 2, Range2.end());
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S1 = None;
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S2 = None;
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for (const auto &S : Range2) {
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if (std::string(S.first) == "Counter")
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S1 = S;
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if (std::string(S.first) == "Counter2")
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S2 = S;
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}
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EXPECT_NE(S1.hasValue(), false);
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EXPECT_NE(S2.hasValue(), false);
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EXPECT_EQ(S1->first, "Counter");
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EXPECT_EQ(S1->second, 2u);
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EXPECT_EQ(S2->first, "Counter2");
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EXPECT_EQ(S2->second, 1u);
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#else
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Counter2++;
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auto &Range = GetStatistics();
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EXPECT_EQ(Range.begin(), Range.end());
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#endif
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}
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} // end anonymous namespace
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