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Eliminate a bunch of work from ValueSymbolTable::insert for the common case

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where a symbol name doesn't conflict.  This speeds up bc reading 16% on 176.gcc!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33981 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-07 05:22:49 +00:00
parent 670ccfe6a4
commit f5111552c2
1 changed files with 7 additions and 1 deletions
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8
lib/VMCore/ValueSymbolTable.cpp
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@ -81,7 +81,13 @@ void ValueSymbolTable::insert(Value* V) {
assert(V && "Can't insert null Value into symbol table!");
assert(V->hasName() && "Can't insert nameless Value into symbol table");
// Check to see if there is a naming conflict. If so, rename this value
// Try inserting the name, assuming it won't conflict.
if (vmap.insert(make_pair(V->Name, V)).second) {
DOUT << " Inserted value: " << V->Name << ": " << *V << "\n";
return;
}
// Otherwise, there is a naming conflict. Rename this value.
std::string UniqueName = getUniqueName(V->getName());
DEBUG(DOUT << " Inserting value: " << UniqueName << ": " << *V << "\n");