[Patch] 3/3 FFI: Use __builtin_flush_icache() to flush MIPS i-cache.

[David Daney]

David Daney wrote:
> This is the third and final part of the __builtin_flush_icache patch.
> It replaces the hard coded library call to cacheflush() in the MIPS
> ffi_prep_closure_loc with a call to __builtin_flush_icache();
>
> For targets that support user-space i-cache flushing (mips32r2), this
> will eliminate a system call from the ffi closure preparation path.
> On all other targets the generated code is the same as before.
>
> Bootstrapped and tested on x86_64-unknown-linux-gnu all default
> languages with no regressions.
>
> Also tested on:
> x86_64 cross to mipsel-linux --with-arch=mips32
> i686   cross to mipsel-linux --with-arch=mips32r2
>
> with no regressions.
A new version of the patch.  All that changed is the name of the 
builtin.  It is now __builtin___clear_cache().

Tested as before.

OK to commit:

2007-07-04  David Daney  <ddaney@avtrex.com>

    * src/mips/ffi.c: Don't include sys/cachectl.h.
    (ffi_prep_closure_loc): Use __builtin___clear_cache() instead of
    cacheflush().

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