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authorChris Lattner <sabre@nondot.org>2004-03-08 22:03:45 +0000
committerChris Lattner <sabre@nondot.org>2004-03-08 22:03:45 +0000
commit7d84dda56044b9731aea613a26ff98c8ceb3b5f9 (patch)
tree5bd70aad9e1bf879be0c56d90997def9e916ceaf /include/llvm/Analysis/ProfileInfo.h
parent62e84f376b621eb848807e0652ad4bfc465ad1f5 (diff)
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Switch over to using edge profile information as the basic profiling representation,
from basic block counts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12241 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Analysis/ProfileInfo.h')
-rw-r--r--include/llvm/Analysis/ProfileInfo.h28
1 files changed, 18 insertions, 10 deletions
diff --git a/include/llvm/Analysis/ProfileInfo.h b/include/llvm/Analysis/ProfileInfo.h
index 3bb056b..a31bedf 100644
--- a/include/llvm/Analysis/ProfileInfo.h
+++ b/include/llvm/Analysis/ProfileInfo.h
@@ -28,31 +28,39 @@ 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;
}
-
+
//===------------------------------------------------------------------===//
/// Analysis Update Methods
///
};
+ /// 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