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StableBasicBlockNumbering is conceptually just a wrapper around UniqueVector,

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so we should actually use a UniqueVector to implement it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33935 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-05 23:19:24 +00:00
parent 1e46ae47b1
commit ae6eb5bfbe
1 changed files with 11 additions and 22 deletions
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33
include/llvm/Support/StableBasicBlockNumbering.h
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@ -18,18 +18,13 @@
#define LLVM_SUPPORT_STABLEBASICBLOCKNUMBERING_H
#include "llvm/Function.h"
#include <map>
#include "llvm/ADT/UniqueVector.h"
namespace llvm {
class StableBasicBlockNumbering {
// BasicBlockNumbering - Holds a numbering of the basic blocks in the
// function in a stable order that does not depend on their address.
std::map<BasicBlock*, unsigned> BasicBlockNumbering;
// NumberedBasicBlock - Holds the inverse mapping of BasicBlockNumbering.
std::vector<BasicBlock*> NumberedBasicBlock;
// BBNumbering - Holds the numbering.
UniqueVector<BasicBlock*> BBNumbering;
public:
StableBasicBlockNumbering(Function *F = 0) {
if (F) compute(*F);
}
@ -37,33 +32,27 @@ namespace llvm {
/// compute - If we have not computed a numbering for the function yet, do
/// so.
void compute(Function &F) {
if (NumberedBasicBlock.empty()) {
unsigned n = 0;
for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I, ++n) {
NumberedBasicBlock.push_back(I);
BasicBlockNumbering[I] = n;
}
if (BBNumbering.empty()) {
for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
BBNumbering.insert(I);
}
}
/// getNumber - Return the ID number for the specified BasicBlock.
///
unsigned getNumber(BasicBlock *BB) const {
std::map<BasicBlock*, unsigned>::const_iterator I =
BasicBlockNumbering.find(BB);
assert(I != BasicBlockNumbering.end() &&
"Invalid basic block or numbering not computed!");
return I->second;
unsigned Idx = BBNumbering.idFor(BB);
assert(Idx && "Invalid basic block or numbering not computed!");
return Idx-1;
}
/// getBlock - Return the BasicBlock corresponding to a particular ID.
///
BasicBlock *getBlock(unsigned N) const {
assert(N < NumberedBasicBlock.size() &&
assert(N < BBNumbering.size() &&
"Block ID out of range or numbering not computed!");
return NumberedBasicBlock[N];
return BBNumbering[N+1];
}
};
}