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Do not do a linear std::find to reconstruct information we had, but later threw

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away.  This speeds up by .bc reader by 30% in a profile build on 252.eon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15450 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-08-03 23:41:28 +00:00
parent 301fe481c2
commit 45b5dd2918
2 changed files with 24 additions and 29 deletions
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27
lib/Bytecode/Reader/Reader.cpp
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@ -26,7 +26,6 @@
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "Support/StringExtras.h"
#include <sstream>
using namespace llvm;
namespace {
@ -294,7 +293,7 @@ const Type *BytecodeReader::getType(unsigned ID) {
if (!CompactionTypes.empty()) {
if (ID >= CompactionTypes.size())
error("Type ID out of range for compaction table!");
return CompactionTypes[ID];
return CompactionTypes[ID].first;
}
// Is it a module-level type?
@ -337,12 +336,11 @@ unsigned BytecodeReader::getTypeSlot(const Type *Ty) {
// Scan the compaction table for the type if needed.
if (!CompactionTypes.empty()) {
std::vector<const Type*>::const_iterator I =
find(CompactionTypes.begin(), CompactionTypes.end(), Ty);
for (unsigned i = 0, e = CompactionTypes.size(); i != e; ++i)
if (CompactionTypes[i].first == Ty)
return Type::FirstDerivedTyID + i;
if (I == CompactionTypes.end())
error("Couldn't find type specified in compaction table!");
return Type::FirstDerivedTyID + (&*I - &CompactionTypes[0]);
error("Couldn't find type specified in compaction table!");
}
// Check the function level types first...
@ -403,15 +401,10 @@ Value * BytecodeReader::getValue(unsigned type, unsigned oNum, bool Create) {
// By default, the global type id is the type id passed in
unsigned GlobalTyID = type;
// If the type plane was compactified, figure out the global type ID
// by adding the derived type ids and the distance.
if (!CompactionTypes.empty() && type >= Type::FirstDerivedTyID) {
const Type *Ty = CompactionTypes[type-Type::FirstDerivedTyID];
TypeListTy::iterator I =
find(ModuleTypes.begin(), ModuleTypes.end(), Ty);
assert(I != ModuleTypes.end());
GlobalTyID = Type::FirstDerivedTyID + (&*I - &ModuleTypes[0]);
}
// If the type plane was compactified, figure out the global type ID by
// adding the derived type ids and the distance.
if (!CompactionTypes.empty() && type >= Type::FirstDerivedTyID)
GlobalTyID = CompactionTypes[type-Type::FirstDerivedTyID].second;
if (hasImplicitNull(GlobalTyID)) {
if (Num == 0)
@ -1053,7 +1046,7 @@ void BytecodeReader::ParseCompactionTypes(unsigned NumEntries) {
if (read_typeid(TypeSlot))
error("Invalid type in compaction table: type type");
const Type *Typ = getGlobalTableType(TypeSlot);
CompactionTypes.push_back(Typ);
CompactionTypes.push_back(std::make_pair(Typ, TypeSlot));
if (Handler) Handler->handleCompactionTableType(i, TypeSlot, Typ);
}
}