diff options
| -rw-r--r-- | include/llvm/Analysis/ValueNumbering.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/llvm/Analysis/ValueNumbering.h b/include/llvm/Analysis/ValueNumbering.h index b337a22a67..0ce8336afe 100644 --- a/include/llvm/Analysis/ValueNumbering.h +++ b/include/llvm/Analysis/ValueNumbering.h @@ -28,6 +28,7 @@ namespace llvm { class Value; struct ValueNumbering { + virtual ~ValueNumbering(); // We want to be subclassed /// getEqualNumberNodes - Return nodes with the same value number as the /// specified Value. This fills in the argument vector with any equal values. @@ -35,7 +36,15 @@ struct ValueNumbering { virtual void getEqualNumberNodes(Value *V1, std::vector<Value*> &RetVals) const = 0; - virtual ~ValueNumbering(); // We want to be subclassed + ///===-------------------------------------------------------------------===// + /// Interfaces to update value numbering analysis information as the client + /// changes the program + /// + + /// deleteInstruction - Clients should invoke this method when they delete an + /// instruction from the program. This allows the analysis implementations to + /// avoid having dangling pointers in their representation. + virtual void deleteInstruction(Instruction *I) {} }; extern void BasicValueNumberingStub(); |