llvm::CastInst::isEliminableCastPair

Return the opcode that replaces an eliminable cast pair.

Synopsis

Declared in <llvm/IR/InstrTypes.h>

static
unsigned int
isEliminableCastPair(
    Instruction::CastOps firstOpcode,
    Instruction::CastOps secondOpcode,
    Type* SrcTy,
    Type* MidTy,
    Type* DstTy,
    DataLayout const* DL);

Description

Determine how a pair of casts can be eliminated, if they can be at all. This is a helper function for both CastInst and ConstantExpr.

Return Value

Zero if the pair cannot be eliminated; otherwise the replacing cast opcode from SrcTy to DstTy.

Parameters

Name

Description

firstOpcode

The opcode of the first cast.

secondOpcode

The opcode of the second cast.

SrcTy

The source type of the first cast.

MidTy

The intermediate type shared by both casts.

DstTy

The destination type of the second cast.

Optional data layout for pointer sizing.

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