diff options
| author | Dehao Chen <dehao@google.com> | 2016-10-18 20:42:47 +0000 |
|---|---|---|
| committer | Dehao Chen <dehao@google.com> | 2016-10-18 20:42:47 +0000 |
| commit | 977fc82cacbbf38008a5b2f86b2b10f37b820965 (patch) | |
| tree | 2f756732e8e00232bd5385fbeb3b46b2d19e51da /lib/IR/LLVMContext.cpp | |
| parent | be23217b8d792cd265ece59534776e9e4da6d9e6 (diff) | |
Use profile info to set function section prefix to group hot/cold functions.
Summary:
The original implementation is in r261607, which was reverted in r269726 to accomendate the ProfileSummaryInfo analysis pass. The new implementation:
1. add a new metadata for function section prefix
2. query against ProfileSummaryInfo in CGP to set the correct section prefix for each function
3. output the section prefix set by CGP
Reviewers: davidxl, eraman
Subscribers: vsk, llvm-commits
Differential Revision: https://reviews.llvm.org/D24989
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284533 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/IR/LLVMContext.cpp')
| -rw-r--r-- | lib/IR/LLVMContext.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/IR/LLVMContext.cpp b/lib/IR/LLVMContext.cpp index c97228fd51a..9dac6151499 100644 --- a/lib/IR/LLVMContext.cpp +++ b/lib/IR/LLVMContext.cpp @@ -138,6 +138,11 @@ LLVMContext::LLVMContext() : pImpl(new LLVMContextImpl(*this)) { assert(TypeID == MD_type && "type kind id drifted"); (void)TypeID; + unsigned SectionPrefixID = getMDKindID("section_prefix"); + assert(SectionPrefixID == MD_section_prefix && + "section_prefix kind id drifted"); + (void)SectionPrefixID; + auto *DeoptEntry = pImpl->getOrInsertBundleTag("deopt"); assert(DeoptEntry->second == LLVMContext::OB_deopt && "deopt operand bundle id drifted!"); |