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Use a map to cache the ModuleType information, so we can do logarithmic

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lookups instead of linear time lookups.  This speeds up bc parsing of a
large file from

137.834u 118.256s 4:27.96
to
132.611u 114.436s 4:08.53

with a release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23611 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-10-03 21:26:53 +00:00
parent 8ba732bb1c
commit eebac5fee6
2 changed files with 47 additions and 8 deletions
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6
lib/Bytecode/Reader/Reader.h
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@ -333,6 +333,12 @@ private:
/// @brief This vector is used to deal with forward references to types in
/// a module.
TypeListTy ModuleTypes;
/// @brief This is an inverse mapping of ModuleTypes from the type to an
/// index. Because refining types causes the index of this map to be
/// invalidated, any time we refine a type, we clear this cache and recompute
/// it next time we need it. These entries are ordered by the pointer value.
std::vector<std::pair<const Type*, unsigned> > ModuleTypeIDCache;
/// @brief This vector is used to deal with forward references to types in
/// a function.