From 302b69c9406b1c690db2e8faaf0a2211dfd46879 Mon Sep 17 00:00:00 2001 From: Dehao Chen Date: Tue, 18 Oct 2016 20:42:47 +0000 Subject: 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 llvm-svn: 284533 --- llvm/lib/IR/MDBuilder.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'llvm/lib/IR/MDBuilder.cpp') diff --git a/llvm/lib/IR/MDBuilder.cpp b/llvm/lib/IR/MDBuilder.cpp index a5a4cd06db0..f4bfd599215 100644 --- a/llvm/lib/IR/MDBuilder.cpp +++ b/llvm/lib/IR/MDBuilder.cpp @@ -63,6 +63,12 @@ MDNode *MDBuilder::createFunctionEntryCount(uint64_t Count) { createConstant(ConstantInt::get(Int64Ty, Count))}); } +MDNode *MDBuilder::createFunctionSectionPrefix(StringRef Prefix) { + return MDNode::get(Context, + {createString("function_section_prefix"), + createString(Prefix)}); +} + MDNode *MDBuilder::createRange(const APInt &Lo, const APInt &Hi) { assert(Lo.getBitWidth() == Hi.getBitWidth() && "Mismatched bitwidths!"); -- cgit v1.2.3