On 06/25/2015 09:13 PM, David Malcolm wrote:
Some interpreters/VMs support a switch statement (for example the JVM
has opcodes "lookupswitch" and "tableswitch"). GCC has a set of
optimizations for efficiently handling switch statements, so it makes
sense to directly expose switch statements in the libgccjit API.
Yes, I hope that feature will be incorporated quickly in gccjit. I don't
have the power to approve that patch, but I hope it will be approved.
This patch implements a switch statement, but it isn't quite ready for
committing to trunk yet:
* It relies on gcc/typed-splay-tree.h in the previous patch
* It extends the libgccjit API. It's not clear to me yet how to
manage extensions of the libgccjit API: should I use symbol maps
and versioning, or bump the SONAME? I'm thinking of providing
precanned feature macros within libgccjit.h e.g:
#define LIBGCCJIT_HAVE_SWITCH_STATEMENT
for the benefit of client code that doesn't use configure
scripts.
Perhaps just exposing the major and minor version of the GCC supporting
that GCCJIT is enough (like it was done for plugins, e.g.
GCCPLUGIN_VERSION etc)?
Regards.
--
Basile STARYNKEVITCH http://starynkevitch.net/Basile/
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