[cfe-dev] Avoid/reduce re-compilations of source files for multiple passes

[James Dennett via cfe-dev]

On Thu, Jul 14, 2016 at 1:38 PM, Himanshu via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hi all,
>
> I run a front end action using the ClangTool::run( ... ) API on a C
> codebase. The action starts with a given functionof interest, and within it
> finds more functions of interest, and visits those. Thus, I make multiple
> passes over the code-base. Hence, the outline of my approach is:
>
> Create ClangTool tool
> // set some initial target function, and then execute the loop:
>
> while(new target functions found) {
>            tool.run (front-end-action that visits functions )
> }
>
> The tool seems to execute the compile commands for each pass, even though
> the compilation units don't change. Is there a way to avoid this
> re-compilation of the same files? Or is there a better way of doing what I
> am trying to do?
>
>
Can you pull that loop inside your ClangTool's code, rather than repeatedly
running the tool?

-- James
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