[LLVMdev] adding comment

[Daniel Sanders]

Would adding a flag to MachineInstr::MIFlag do the trick? I'm thinking that fast isel could ensure that a flag (e.g. MIFlag::FastISel) is added to the instructions it creates, then the instruction printer could optionally emit a comment for instructions that have this flag.

> -----Original Message-----
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
> On Behalf Of Reed Kotler
> Sent: 16 April 2014 22:17
> To: LLVMdev at cs.uiuc.edu
> Subject: Re: [LLVMdev] adding comment
> 
> On 04/16/2014 02:06 PM, reed kotler wrote:
> > Is there a simple way to add a comment in the machine instructions of
> > a basic block?
> >
> > Ideally something that can be used with machine instruction builder.
> >
> > Tia.
> >
> > Reed
> 
> In this case, I am working on the fast instruction selector for mips.
> 
> I want to be able to tag instructions or regions of instructions that are
> emitted by the fast instruction selector as opposed to the normal
> mechanism.
> 
> In fast instruction selector can always report that it cannot emit instructions
> for some construct and then that part falls on the normal mechanism; though
> in some cases the actual machine instructions emitted would be the same.
> 
> So I want to be able to look for some kind of tag in the make check tests.
> 
> Tia.
> 
> Reed
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