From 7ab83427af0f77b59941ceba41d509d7d097b065 Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Sat, 10 Jun 2017 13:44:06 +0000 Subject: Vendor import of llvm trunk r305145: https://llvm.org/svn/llvm-project/llvm/trunk@305145 --- lib/Bitcode/Writer/BitcodeWriter.cpp | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'lib/Bitcode/Writer/BitcodeWriter.cpp') diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp index 9043b8c12d25..d5879fec95cb 100644 --- a/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -3305,7 +3305,15 @@ static const uint64_t INDEX_VERSION = 3; /// Emit the per-module summary section alongside the rest of /// the module's bitcode. void ModuleBitcodeWriter::writePerModuleGlobalValueSummary() { - Stream.EnterSubblock(bitc::GLOBALVAL_SUMMARY_BLOCK_ID, 4); + // By default we compile with ThinLTO if the module has a summary, but the + // client can request full LTO with a module flag. + bool IsThinLTO = true; + if (auto *MD = + mdconst::extract_or_null(M.getModuleFlag("ThinLTO"))) + IsThinLTO = MD->getZExtValue(); + Stream.EnterSubblock(IsThinLTO ? bitc::GLOBALVAL_SUMMARY_BLOCK_ID + : bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID, + 4); Stream.EmitRecord(bitc::FS_VERSION, ArrayRef{INDEX_VERSION}); -- cgit v1.2.3