[llvm-dev] Replace "ret" with "pop+jump"

[mayuyu.io via llvm-dev]

IndirectBr only works for Branch instructions, not ret.
The latter one seems likely however I’m no where near a backend expert so I could be wrong : (

Zhang

> 在 2018年8月9日，11:23，PenYiWang via llvm-dev <llvm-dev at lists.llvm.org> 写道：
> 
> Hi 
> 
> I want to replace all the return instructions in the program with pop <reg>; jmp <reg>.
> 
> Should I use  IRBuilder in LLVM IR level?
> 
> I found that there is a IRBuilder::CreateIndirectBr
> 
> Or Should I modify the code in lib/Target/X86/X86ISelLowering.cpp in backend ?
> 
> I found that there is a X86TargetLowering::LowerCall
> 
> Which is better?
> 
> Thanks
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