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| author | Dehao Chen <dehao@google.com> | 2017-02-28 18:09:44 +0000 |
|---|---|---|
| committer | Dehao Chen <dehao@google.com> | 2017-02-28 18:09:44 +0000 |
| commit | e26c421c66edc0e8f1f7e42f4f450f3b81f6e223 (patch) | |
| tree | 9677ffb525b0ae191eacf4c2c88f4e25934eb137 /lib/IR/MDBuilder.cpp | |
| parent | f563b7840e0cc6ce36d34a846e069e8f0f3a89f4 (diff) | |
Add function importing info from samplepgo profile to the module summary.
Summary: For SamplePGO, the profile may contain cross-module inline stacks. As we need to make sure the profile annotation happens when all the hot inline stacks are expanded, we need to pass this info to the module importer so that it can import proper functions if necessary. This patch implemented this feature by emitting cross-module targets as part of function entry metadata. In the module-summary phase, the metadata is used to build call edges that points to functions need to be imported.
Reviewers: mehdi_amini, tejohnson
Reviewed By: tejohnson
Subscribers: davidxl, llvm-commits
Differential Revision: https://reviews.llvm.org/D30053
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296498 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/IR/MDBuilder.cpp')
| -rw-r--r-- | lib/IR/MDBuilder.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/IR/MDBuilder.cpp b/lib/IR/MDBuilder.cpp index f4bfd599215..b9c4f482adf 100644 --- a/lib/IR/MDBuilder.cpp +++ b/lib/IR/MDBuilder.cpp @@ -56,11 +56,16 @@ MDNode *MDBuilder::createUnpredictable() { return MDNode::get(Context, None); } -MDNode *MDBuilder::createFunctionEntryCount(uint64_t Count) { +MDNode *MDBuilder::createFunctionEntryCount( + uint64_t Count, const DenseSet<GlobalValue::GUID> *Imports) { Type *Int64Ty = Type::getInt64Ty(Context); - return MDNode::get(Context, - {createString("function_entry_count"), - createConstant(ConstantInt::get(Int64Ty, Count))}); + SmallVector<Metadata *, 8> Ops; + Ops.push_back(createString("function_entry_count")); + Ops.push_back(createConstant(ConstantInt::get(Int64Ty, Count))); + if (Imports) + for (auto ID : *Imports) + Ops.push_back(createConstant(ConstantInt::get(Int64Ty, ID))); + return MDNode::get(Context, Ops); } MDNode *MDBuilder::createFunctionSectionPrefix(StringRef Prefix) { |