llvm::CloneBasicBlock 示例

Question

I am trying to find an example code which uses llvm::CloneBasicBlock , but can't find it. I am having problems with PHI nodes and problem with instruction domination. So I'll appreciate any good example code which teach how to use llvm::CloneBasicBlock properly.

Answer 1

What's wrong with looking in the LLVM source itself? CloneBasicBlock is used in a number of places. The simplest is probably llvm::CloneFunctionInto ; it should probably be enough to demonstrate how to correctly use the function (in terms of what arguments to pass, etc.)

A more interesting example is in llvm::LoopUnroll , which also has to deal with references from PHI nodes.