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Add an interface to update value numbering

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12822 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-04-10 22:32:09 +00:00
parent d76956d444
commit c39546cceb
1 changed files with 10 additions and 1 deletions
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11
include/llvm/Analysis/ValueNumbering.h
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@ -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();