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Switch over to using edge profile information as the basic profiling representation,

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from basic block counts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12241 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-03-08 22:03:45 +00:00
parent 62e84f376b
commit 7d84dda560
1 changed files with 18 additions and 10 deletions
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26
include/llvm/Analysis/ProfileInfo.h
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@ -28,23 +28,27 @@ namespace llvm {
class BasicBlock;
class Pass;
/// createProfileLoaderPass - This function returns a Pass that loads the
/// profiling information for the module from the specified filename, making
/// it available to the optimizers.
Pass *createProfileLoaderPass(const std::string &Filename);
/// ProfileInfo Class - This class holds and maintains edge profiling
/// information for some unit of code.
class ProfileInfo {
protected:
std::map<BasicBlock*, unsigned> ExecutionCounts;
// EdgeCounts - Count the number of times a transition between two blocks is
// executed. As a special case, we also hold an edge from the null
// BasicBlock to the entry block to indicate how many times the function was
// entered.
std::map<std::pair<BasicBlock*, BasicBlock*>, unsigned> EdgeCounts;
public:
virtual ~ProfileInfo(); // We want to be subclassed
//===------------------------------------------------------------------===//
/// Profile Information Queries
///
unsigned getExecutionCount(BasicBlock *BB) {
std::map<BasicBlock*, unsigned>::iterator I = ExecutionCounts.find(BB);
return I != ExecutionCounts.end() ? I->second : 0;
unsigned getExecutionCount(BasicBlock *BB) const;
unsigned getEdgeWeight(BasicBlock *Src, BasicBlock *Dest) const {
std::map<std::pair<BasicBlock*, BasicBlock*>, unsigned>::const_iterator I=
EdgeCounts.find(std::make_pair(Src, Dest));
return I != EdgeCounts.end() ? I->second : 0;
}
//===------------------------------------------------------------------===//
@ -53,6 +57,10 @@ namespace llvm {
};
/// createProfileLoaderPass - This function returns a Pass that loads the
/// profiling information for the module from the specified filename, making
/// it available to the optimizers.
Pass *createProfileLoaderPass(const std::string &Filename);
} // End llvm namespace
#endif