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add a trivial line # cache to SourceMgr to make repeated queries to

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FindLineNumber much faster when in sequence.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78693 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-08-11 17:49:14 +00:00
parent b27a41b440
commit 1d96ccc69a
2 changed files with 45 additions and 1 deletions
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6
include/llvm/Support/SourceMgr.h
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@@ -65,10 +65,14 @@ class SourceMgr {
// include files in.
std::vector<std::string> IncludeDirectories;
/// LineNoCache - This is a cache for line number queries, its implementation
/// is really private to SourceMgr.cpp.
mutable void *LineNoCache;
SourceMgr(const SourceMgr&); // DO NOT IMPLEMENT
void operator=(const SourceMgr&); // DO NOT IMPLEMENT
public:
SourceMgr() {}
SourceMgr() : LineNoCache(0) {}
~SourceMgr();
void setIncludeDirs(const std::vector<std::string> &Dirs) {