Add the ability to synthesize function counts from block count information
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9595 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-prof/ProfileInfo.cpp b/tools/llvm-prof/ProfileInfo.cpp
index 4c31138..78de9c1 100644
--- a/tools/llvm-prof/ProfileInfo.cpp
+++ b/tools/llvm-prof/ProfileInfo.cpp
@@ -141,8 +141,15 @@
void ProfileInfo::getFunctionCounts(std::vector<std::pair<Function*,
unsigned> > &Counts) {
if (FunctionCounts.empty()) {
- std::cerr << "Function counts not available, and no synthesis "
- << "is implemented yet!\n";
+ // Synthesize function frequency information from the number of times their
+ // entry blocks were executed.
+ std::vector<std::pair<BasicBlock*, unsigned> > BlockCounts;
+ getBlockCounts(BlockCounts);
+
+ for (unsigned i = 0, e = BlockCounts.size(); i != e; ++i)
+ if (&BlockCounts[i].first->getParent()->front() == BlockCounts[i].first)
+ Counts.push_back(std::make_pair(BlockCounts[i].first->getParent(),
+ BlockCounts[i].second));
return;
}