[cfe-dev] A plugin proposal for clang

John Criswell criswell at illinois.edu
Mon Oct 17 07:34:17 PDT 2011

On 10/15/11 3:44 AM, David Chisnall wrote:
> On 15 Oct 2011, at 01:31, Joshua Cranmer wrote:
>> 	• Custom optimization passes
> These are more likely to be LLVM plugins than clang plugins.  We already have a mechanism for optimisation plugins to automatically insert themselves into the optimiser chain - I'm using this for some Objective-C optimisations.

Is there currently a way to do that based on compiler flags?  For 
SAFECode, we added a -fmemsafety flag to enable/disable the transforms 
that add memory safety checks.  Being able to write a plugin for Clang 
that adds command-line options that can enable new transformation passes 
would alleviate our need to copy Clang into the SAFECode project.

-- John T.

> These would be better loaded from a config file by the LLVM plugin loader, because there is no sensible way for clang to pass optimisation plugins to the linker for LTO.
> David
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