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Add an interface to constant fold and instruction given it's opcode, type 

and operands.

llvm-svn: 28516
This commit is contained in:
Chris Lattner 2006-05-27 01:17:40 +00:00
parent 1a2a101359
commit 00bb5f8248
1 changed files with 9 additions and 0 deletions
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9
llvm/include/llvm/Transforms/Utils/Local.h
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@ -48,6 +48,15 @@ bool ConstantFoldTerminator(BasicBlock *BB);
///
Constant *ConstantFoldInstruction(Instruction *I);
/// ConstantFoldInstOperands - Attempt to constant fold an instruction with the
/// specified opcode and operands. If successful, the constant result is
/// returned, if not, null is returned. Note that this function can fail when
/// attempting to fold instructions like loads and stores, which have no
/// constant expression form.
///
Constant *ConstantFoldInstOperands(unsigned Opc, const Type *DestTy,
const std::vector<Constant*> &Ops);
/// ConstantFoldLoadThroughGEPConstantExpr - Given a constant and a
/// getelementptr constantexpr, return the constant value being addressed by the