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[ThinLTO] Record all global variable defs in the summary

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Record all variable defs with a summary record to aid in building a
complete reference graph and locating constant variable defs to import.

llvm-svn: 263576
This commit is contained in:
Teresa Johnson 2016-03-15 19:35:45 +00:00
parent 35b3cf6cf1
commit 4ce6e8f7a7
1 changed files with 10 additions and 11 deletions
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21
lib/Bitcode/Writer/BitcodeWriter.cpp
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@ -2900,20 +2900,20 @@ static void WriteModuleLevelReferences(const GlobalVariable &V,
SmallVector<uint64_t, 64> &NameVals,
unsigned FSModRefsAbbrev,
BitstreamWriter &Stream) {
// Only interested in recording variable defs in the summary.
if (V.isDeclaration())
return;
DenseSet<unsigned> RefEdges;
SmallPtrSet<const User *, 8> Visited;
findRefEdges(&V, VE, RefEdges, Visited);
unsigned RefCount = RefEdges.size();
if (RefCount) {
NameVals.push_back(VE.getValueID(&V));
NameVals.push_back(getEncodedLinkage(V.getLinkage()));
for (auto RefId : RefEdges) {
NameVals.push_back(RefId);
}
Stream.EmitRecord(bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS, NameVals,
FSModRefsAbbrev);
NameVals.clear();
NameVals.push_back(VE.getValueID(&V));
NameVals.push_back(getEncodedLinkage(V.getLinkage()));
for (auto RefId : RefEdges) {
NameVals.push_back(RefId);
}
Stream.EmitRecord(bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS, NameVals,
FSModRefsAbbrev);
NameVals.clear();
}
/// Emit the per-module summary section alongside the rest of
@ -3054,7 +3054,6 @@ static void WriteCombinedGlobalValueSummary(
assert(S);
if (auto *VS = dyn_cast<GlobalVarSummary>(S)) {
assert(!VS->refs().empty() && "Expected at least one ref edge");
NameVals.push_back(I.getModuleId(VS->modulePath()));
NameVals.push_back(getEncodedLinkage(VS->linkage()));
for (auto &RI : VS->refs()) {