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(NFC) Track global summary liveness in GVFlags.

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Replace GVFlags::LiveRoot with GVFlags::Live and use that instead of
all the DeadSymbols sets. This is refactoring in order to make
liveness information available in the RegularLTO pipeline.

llvm-svn: 304466
This commit is contained in:
Evgeniy Stepanov
2017-06-01 20:30:06 +00:00
parent a5dbbc6ead
commit 56584bbf16
8 changed files with 114 additions and 103 deletions
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llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -864,7 +864,7 @@ static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags) {
uint64_t RawFlags = 0;
RawFlags |= Flags.NotEligibleToImport; // bool
RawFlags |= (Flags.LiveRoot << 1);
RawFlags |= (Flags.Live << 1);
// Linkage don't need to be remapped at that time for the summary. Any future
// change to the getEncodedLinkage() function will need to be taken into
// account here as well.