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-rw-r--r--llvm/lib/Transforms/IPO/FunctionImport.cpp74
1 files changed, 1 insertions, 73 deletions
diff --git a/llvm/lib/Transforms/IPO/FunctionImport.cpp b/llvm/lib/Transforms/IPO/FunctionImport.cpp
index 9165a2feebe..a3c743f6356 100644
--- a/llvm/lib/Transforms/IPO/FunctionImport.cpp
+++ b/llvm/lib/Transforms/IPO/FunctionImport.cpp
@@ -105,78 +105,6 @@ static std::unique_ptr<Module> loadFile(const std::string &FileName,
namespace {
-// Return true if the Summary describes a GlobalValue that can be externally
-// referenced, i.e. it does not need renaming (linkage is not local) or renaming
-// is possible (does not have a section for instance).
-static bool canBeExternallyReferenced(const GlobalValueSummary &Summary) {
- if (!Summary.needsRenaming())
- return true;
-
- if (Summary.noRename())
- // Can't externally reference a global that needs renaming if has a section
- // or is referenced from inline assembly, for example.
- return false;
-
- return true;
-}
-
-// Return true if \p GUID describes a GlobalValue that can be externally
-// referenced, i.e. it does not need renaming (linkage is not local) or
-// renaming is possible (does not have a section for instance).
-static bool canBeExternallyReferenced(const ModuleSummaryIndex &Index,
- GlobalValue::GUID GUID) {
- auto Summaries = Index.findGlobalValueSummaryList(GUID);
- if (Summaries == Index.end())
- return true;
- if (Summaries->second.size() != 1)
- // If there are multiple globals with this GUID, then we know it is
- // not a local symbol, and it is necessarily externally referenced.
- return true;
-
- // We don't need to check for the module path, because if it can't be
- // externally referenced and we call it, it is necessarilly in the same
- // module
- return canBeExternallyReferenced(**Summaries->second.begin());
-}
-
-// Return true if the global described by \p Summary can be imported in another
-// module.
-static bool eligibleForImport(const ModuleSummaryIndex &Index,
- const GlobalValueSummary &Summary) {
- if (!canBeExternallyReferenced(Summary))
- // Can't import a global that needs renaming if has a section for instance.
- // FIXME: we may be able to import it by copying it without promotion.
- return false;
-
- // Don't import functions that are not viable to inline.
- if (Summary.isNotViableToInline())
- return false;
-
- // Check references (and potential calls) in the same module. If the current
- // value references a global that can't be externally referenced it is not
- // eligible for import. First check the flag set when we have possible
- // opaque references (e.g. inline asm calls), then check the call and
- // reference sets.
- if (Summary.hasInlineAsmMaybeReferencingInternal())
- return false;
- bool AllRefsCanBeExternallyReferenced =
- llvm::all_of(Summary.refs(), [&](const ValueInfo &VI) {
- return canBeExternallyReferenced(Index, VI.getGUID());
- });
- if (!AllRefsCanBeExternallyReferenced)
- return false;
-
- if (auto *FuncSummary = dyn_cast<FunctionSummary>(&Summary)) {
- bool AllCallsCanBeExternallyReferenced = llvm::all_of(
- FuncSummary->calls(), [&](const FunctionSummary::EdgeTy &Edge) {
- return canBeExternallyReferenced(Index, Edge.first.getGUID());
- });
- if (!AllCallsCanBeExternallyReferenced)
- return false;
- }
- return true;
-}
-
/// Given a list of possible callee implementation for a call site, select one
/// that fits the \p Threshold.
///
@@ -214,7 +142,7 @@ selectCallee(const ModuleSummaryIndex &Index,
if (Summary->instCount() > Threshold)
return false;
- if (!eligibleForImport(Index, *Summary))
+ if (Summary->notEligibleToImport())
return false;
return true;
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