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[clang] Reduce TemplateDeclInstantiator size. #142983

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Merged
merged 2 commits into from
Jun 6, 2025
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[clang] Reduce TemplateDeclInstantiator size. #142983

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61be4bf
[clang] Reduce TemplateDeclInstantiator size.
hokein Jun 5, 2025
77ecc3b
clang-format
hokein Jun 6, 2025
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9 changes: 5 additions & 4 deletions clang/include/clang/Sema/Template.h
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Original file line number Diff line number Diff line change
Expand Up @@ -587,16 +587,17 @@ enum class TemplateSubstitutionKind : char {
/// specializations that will need to be instantiated after the
/// enclosing class's instantiation is complete.
SmallVector<std::pair<ClassTemplateDecl *,
ClassTemplatePartialSpecializationDecl *>, 4>
OutOfLinePartialSpecs;
ClassTemplatePartialSpecializationDecl *>,
1>
OutOfLinePartialSpecs;

/// A list of out-of-line variable template partial
/// specializations that will need to be instantiated after the
/// enclosing variable's instantiation is complete.
/// FIXME: Verify that this is needed.
SmallVector<
std::pair<VarTemplateDecl *, VarTemplatePartialSpecializationDecl *>, 4>
OutOfLineVarPartialSpecs;
std::pair<VarTemplateDecl *, VarTemplatePartialSpecializationDecl *>, 1>
OutOfLineVarPartialSpecs;

public:
TemplateDeclInstantiator(Sema &SemaRef, DeclContext *Owner,
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2 changes: 1 addition & 1 deletion clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
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Expand Up @@ -2394,7 +2394,7 @@ Decl *TemplateDeclInstantiator::VisitVarTemplateDecl(VarTemplateDecl *D) {
// Queue up any out-of-line partial specializations of this member
// variable template; the client will force their instantiation once
// the enclosing class has been instantiated.
SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs;
SmallVector<VarTemplatePartialSpecializationDecl *, 1> PartialSpecs;
D->getPartialSpecializations(PartialSpecs);
for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I)
if (PartialSpecs[I]->getFirstDecl()->isOutOfLine())
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