On 29/01/2020 08:24, Richard Biener wrote:
On Tue, Jan 28, 2020 at 5:53 PM Andrew Stubbs <a...@codesourcery.com> wrote:
This patch fixes an ICE compiling fast-math-pr55281.c for amdgcn.
The problem is that an "iv" is created in which both base and step are
pointer types,
How did you get a POINTER_TYPE step? That's where the issue lies
I think.
It can come from "find_inv_vars_cb":
set_iv (idata, op, op, build_int_cst (TREE_TYPE (op), 0), true);
whenever "op" has a pointer type.
Similarly for "get_iv":
set_iv (data, var, var, build_int_cst (type, 0), true);
whenever "var" has a pointer type.
In this particular case, I traced the origin back to the second one, I
think (but it's somewhat hard to unpick).
I could change one or both of those, but I don't understand enough about
the consequences of that to be sure it's the right thing to do. I can
confirm that converting the step at this point does appear to have the
desired effect in this instance.
At least at the point of writing it to gimple I can determine what is
definitely malformed.
Andrew
