Add getBlockProfileCount method to BlockFrequencyInfo
Differential Revision: http://reviews.llvm.org/D18233
llvm-svn: 264179
diff --git a/llvm/unittests/Analysis/BlockFrequencyInfoTest.cpp b/llvm/unittests/Analysis/BlockFrequencyInfoTest.cpp
new file mode 100644
index 0000000..6451637
--- /dev/null
+++ b/llvm/unittests/Analysis/BlockFrequencyInfoTest.cpp
@@ -0,0 +1,86 @@
+//===- BlockFrequencyInfoTest.cpp - BlockFrequencyInfo unit tests ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/Analysis/BlockFrequencyInfoImpl.h"
+#include "llvm/Analysis/BranchProbabilityInfo.h"
+#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/AsmParser/Parser.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/raw_ostream.h"
+#include "gtest/gtest.h"
+
+namespace llvm {
+namespace {
+
+class BlockFrequencyInfoTest : public testing::Test {
+protected:
+ std::unique_ptr<BranchProbabilityInfo> BPI;
+ std::unique_ptr<DominatorTree> DT;
+ std::unique_ptr<LoopInfo> LI;
+
+ BlockFrequencyInfo buildBFI(Function &F) {
+ DT.reset(new DominatorTree(F));
+ LI.reset(new LoopInfo(*DT));
+ BPI.reset(new BranchProbabilityInfo(F, *LI));
+ return BlockFrequencyInfo(F, *BPI, *LI);
+ }
+ std::unique_ptr<Module> makeLLVMModule() {
+ const char *ModuleStrig = "define i32 @f(i32 %x) {\n"
+ "bb0:\n"
+ " %y1 = icmp eq i32 %x, 0 \n"
+ " br i1 %y1, label %bb1, label %bb2 \n"
+ "bb1:\n"
+ " br label %bb3\n"
+ "bb2:\n"
+ " br label %bb3\n"
+ "bb3:\n"
+ " %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
+ " ret i32 %y2\n"
+ "}\n";
+ LLVMContext &C = getGlobalContext();
+ SMDiagnostic Err;
+ return parseAssemblyString(ModuleStrig, Err, C);
+ }
+};
+
+TEST_F(BlockFrequencyInfoTest, Basic) {
+ auto M = makeLLVMModule();
+ Function *F = M->getFunction("f");
+ F->setEntryCount(100);
+
+ BlockFrequencyInfo BFI = buildBFI(*F);
+ BasicBlock &BB0 = F->getEntryBlock();
+ BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
+ BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
+ BasicBlock *BB3 = BB1->getSingleSuccessor();
+
+ uint64_t BB0Freq = BFI.getBlockFreq(&BB0).getFrequency();
+ uint64_t BB1Freq = BFI.getBlockFreq(BB1).getFrequency();
+ uint64_t BB2Freq = BFI.getBlockFreq(BB2).getFrequency();
+ uint64_t BB3Freq = BFI.getBlockFreq(BB3).getFrequency();
+
+ EXPECT_EQ(BB0Freq, BB3Freq);
+ EXPECT_EQ(BB0Freq, BB1Freq + BB2Freq);
+ EXPECT_EQ(BB0Freq, BB3Freq);
+
+ EXPECT_EQ(BFI.getBlockProfileCount(&BB0).getValue(), UINT64_C(100));
+ EXPECT_EQ(BFI.getBlockProfileCount(BB3).getValue(), UINT64_C(100));
+ EXPECT_EQ(BFI.getBlockProfileCount(BB1).getValue(), 100 * BB1Freq / BB0Freq);
+ EXPECT_EQ(BFI.getBlockProfileCount(BB2).getValue(), 100 * BB2Freq / BB0Freq);
+}
+
+} // end anonymous namespace
+} // end namespace llvm