[LLVMdev] issues with InlineAsm class and #APP/#NOAPP

[reed kotler]

When the compiler emits assembly code in gcc, there is no #APP/#NOAPP

In my case, I'm creating inline assembly IR as part of the compilation 
process (not user supplied).

These are for compiler generated stubs.

So I'm seeing these #APP,#NOAPP wrappers which are meant for user inline 
assembly.
Since I'm generating a lot of inline assembly and then each line is 
enclosed by this pair, it makes it hard to read the stubs and gcc 
generated stubs do not have them. Yes, I could buffer them and generate 
one long string but still that long string will have this wrapper and 
that's already more work .

It's not hard for me to  disable the wrappers by extending our Mips 
derived version of MCAsmInfo but it seems like this should be solved 
more generally for everyone. I'm generating a whole stub and not misc. 
asm code so I can do this easily but in other cases it would not be 
possible if things were inserted in the middle of other code.

One way would be to add a field to InlineAsm which says whether the 
compiler or user has requested the inline asm.

Then we need to similarly do something different when the IR is lowered 
to preserve this
information.