[cfe-dev] Target specific passes in clang.

Daniel Dunbar daniel at zuster.org
Sat Feb 20 02:18:55 PST 2010

Hi Sanjiv,

I'm not exactly sure what you are asking for.

Clang already runs various passes as part of -O0, -O1, etc. Adding a
target hook for that would be relatively straightforward, although we
want to make sure that one doesn't have to link in LLVM just to run

I also plan to make the clang driver accept .ll and .bc files,
eventually, but I'm not sure if this is what you are asking.

 - Daniel

On Thu, Feb 18, 2010 at 10:15 PM, Sanjiv Gupta
<sanjiv.gupta at microchip.com> wrote:
> I am looking for a single driver that should be able to generate the
> assembly for a given target.
> It should be able to generate the bitcode, run standard LTO passes, run
> target specific module passes and final function passes to generate
> assembly. So pretty much clang -emit-llvm-bc, llvm-ld , opt and llc
> functionality in a single executable.
> Besides, the option to be able to invoke native assembler and native linker
> to generate final executable should also be handled by this driver.
> Currently, clang takes a -triple option to specify the target.
> Can a target schedule these things in clang?
> Right now we are using a .td based compilerdriver plugin to invoke these
> different set of executables.
> - Sanjiv
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