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Re: how to modify gcc to compile a[b] differently
- From: Richard Biener <richard dot guenther at gmail dot com>
- To: Gry Gunvor <gry dot gunvor at gmail dot com>
- Cc: GCC Development <gcc at gcc dot gnu dot org>
- Date: Wed, 1 Apr 2015 11:19:56 +0200
- Subject: Re: how to modify gcc to compile a[b] differently
- Authentication-results: sourceware.org; auth=none
- References: <CA+mdN-FB_1w6NJtQpWZ-jycsS-n6qoo=FAo_z+9cATcE7QQv9A at mail dot gmail dot com>
On Wed, Apr 1, 2015 at 12:20 AM, Gry Gunvor <firstname.lastname@example.org> wrote:
> I want to modify gcc 4.9.2 so that array subscripting expressions a[b]
> generate a new instruction/syscall foo(a, b) (that is, taking a and b
> as arguments) rather than just being turned into *(a+b).
> Further, I want accesses into multi-dimensional arrays a[b][c] to turn
> into foo(a, (b * row_size + c)) rather than *(a + b * row_size + c).
> Any help finding a simple and robust way to do this would be greatly
You probably want to do this in the frontends.