On 7/12/19 3:35 AM, Richard Biener wrote:
On Thu, Jul 11, 2019 at 7:43 PM Martin Sebor <mse...@gmail.com> wrote:
Attached is a patch that adds a new parameter to limit the number
of SSA_NAME assignments for GCC to follow in iterative or recursive
algorithms. Purely as a proof of concept the patch introduces
the parameter into -Warray-bounds where the warning follows
POINTER_PLUS (and ASSERT_EXPR) assignments to get at the DECL
the final pointer points to.
With this "infrastructure" in place the parameter can start to be
introduced wherever else it might be necessary. I don't know of
any pathological cases where it actually is necessary (i.e., one
the 512 default keeps from going off the rails) so the test I have
put together for it is artificial. A better test case involving
one of the known recursive algorithms would be helpful.
The docs talk about diagnostics so I wonder if the param
name should include that as well, otherwise OK.
I committed the patch as is for now. The parameter's effect is
on both, optimization and diagnostics, so a generic name seems
like a good fit. Plus, I couldn't off hand think of a better
name. We can always change it if you or someone else comes up
with one.
Martin
