diff options
Diffstat (limited to 'include/llvm/Analysis')
| -rw-r--r-- | include/llvm/Analysis/ScalarEvolution.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h index 8e5f540..67e2659 100644 --- a/include/llvm/Analysis/ScalarEvolution.h +++ b/include/llvm/Analysis/ScalarEvolution.h @@ -219,10 +219,11 @@ namespace llvm { /// exit value. std::map<PHINode*, Constant*> ConstantEvolutionLoopExitValue; - /// ValuesAtScopes - This map contains entries for all the instructions - /// that we attempt to compute getSCEVAtScope information for without - /// using SCEV techniques, which can be expensive. - std::map<Instruction *, std::map<const Loop *, Constant *> > ValuesAtScopes; + /// ValuesAtScopes - This map contains entries for all the expressions + /// that we attempt to compute getSCEVAtScope information for, which can + /// be expensive in extreme cases. + std::map<const SCEV *, + std::map<const Loop *, const SCEV *> > ValuesAtScopes; /// createSCEV - We know that there is no SCEV for the specified value. /// Analyze the expression. @@ -236,6 +237,11 @@ namespace llvm { /// SCEVs. const SCEV *createNodeForGEP(Operator *GEP); + /// computeSCEVAtScope - Implementation code for getSCEVAtScope; called + /// at most once for each SCEV+Loop pair. + /// + const SCEV *computeSCEVAtScope(const SCEV *S, const Loop *L); + /// ForgetSymbolicValue - This looks up computed SCEV values for all /// instructions that depend on the given instruction and removes them from /// the Scalars map if they reference SymName. This is used during PHI |