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ea195a382e
At the same time, fixes InstructionsTest::CastInst unittest: yes you can leave the IR in an invalid state and exit when you don't destroy the context (like the global one), no longer now. This is the first part of http://reviews.llvm.org/D19094 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266379
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
//===- BlockFrequencyInfoTest.cpp - BlockFrequencyInfo 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/Analysis/BlockFrequencyInfo.h"
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#include "llvm/Analysis/BlockFrequencyInfoImpl.h"
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#include "llvm/Analysis/BranchProbabilityInfo.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Dominators.h"
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#include "llvm/IR/Function.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/Support/DataTypes.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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class BlockFrequencyInfoTest : public testing::Test {
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protected:
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std::unique_ptr<BranchProbabilityInfo> BPI;
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std::unique_ptr<DominatorTree> DT;
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std::unique_ptr<LoopInfo> LI;
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LLVMContext C;
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BlockFrequencyInfo buildBFI(Function &F) {
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DT.reset(new DominatorTree(F));
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LI.reset(new LoopInfo(*DT));
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BPI.reset(new BranchProbabilityInfo(F, *LI));
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return BlockFrequencyInfo(F, *BPI, *LI);
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}
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std::unique_ptr<Module> makeLLVMModule() {
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const char *ModuleStrig = "define i32 @f(i32 %x) {\n"
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"bb0:\n"
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" %y1 = icmp eq i32 %x, 0 \n"
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" br i1 %y1, label %bb1, label %bb2 \n"
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"bb1:\n"
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" br label %bb3\n"
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"bb2:\n"
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" br label %bb3\n"
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"bb3:\n"
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" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
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" ret i32 %y2\n"
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"}\n";
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SMDiagnostic Err;
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return parseAssemblyString(ModuleStrig, Err, C);
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}
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};
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TEST_F(BlockFrequencyInfoTest, Basic) {
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auto M = makeLLVMModule();
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Function *F = M->getFunction("f");
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F->setEntryCount(100);
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BlockFrequencyInfo BFI = buildBFI(*F);
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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uint64_t BB0Freq = BFI.getBlockFreq(&BB0).getFrequency();
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uint64_t BB1Freq = BFI.getBlockFreq(BB1).getFrequency();
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uint64_t BB2Freq = BFI.getBlockFreq(BB2).getFrequency();
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uint64_t BB3Freq = BFI.getBlockFreq(BB3).getFrequency();
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EXPECT_EQ(BB0Freq, BB3Freq);
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EXPECT_EQ(BB0Freq, BB1Freq + BB2Freq);
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EXPECT_EQ(BB0Freq, BB3Freq);
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EXPECT_EQ(BFI.getBlockProfileCount(&BB0).getValue(), UINT64_C(100));
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EXPECT_EQ(BFI.getBlockProfileCount(BB3).getValue(), UINT64_C(100));
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EXPECT_EQ(BFI.getBlockProfileCount(BB1).getValue(), 100 * BB1Freq / BB0Freq);
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EXPECT_EQ(BFI.getBlockProfileCount(BB2).getValue(), 100 * BB2Freq / BB0Freq);
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}
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} // end anonymous namespace
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} // end namespace llvm
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