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eliminate the duplicate detection loop, moving it into the loop that populates the Opts vector in the first place.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82367 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-09-20 05:22:52 +00:00
parent 081bcb0d41
commit d0062c6e7c
1 changed files with 6 additions and 13 deletions
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19
lib/Support/CommandLine.cpp
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@ -1033,6 +1033,8 @@ public:
// Copy Options into a vector so we can sort them as we like.
std::vector<Option*> Opts;
SmallPtrSet<Option*, 128> OptionSet; // Duplicate option detection.
for (StringMap<Option*>::iterator I = OptMap.begin(), E = OptMap.end();
I != E; ++I) {
// Ignore really-hidden options.
@ -1043,20 +1045,11 @@ public:
if (I->second->getOptionHiddenFlag() == Hidden && !ShowHidden)
continue;
Opts.push_back(I->second);
}
// If we've already seen this option, don't add it to the list again.
if (OptionSet.insert(I->second))
continue;
// Eliminate duplicate entries in table (from enum flags options, f.e.).
{ // Give OptionSet a scope
SmallPtrSet<Option*, 32> OptionSet;
for (unsigned i = 0; i != Opts.size(); ++i) {
if (OptionSet.insert(Opts[i])) // Add new entry to set
continue;
// Erase duplicate.
Opts[i] = Opts.back();
Opts.pop_back();
--i;
}
Opts.push_back(I->second);
}
if (ProgramOverview)