On 10/08/2015 07:17 AM, Bin.Cheng wrote:
On Thu, Oct 8, 2015 at 12:59 PM, Richard Henderson <r...@redhat.com> wrote:
This is the patch that richi includes in the PR. There will need to
be an additional patch to solve an ICE for the AVR backend, as noted
in the PR, but this is good enough to solve the bad-code generation
problem for the i386 backend.
Hi Richard,
For the record, the root cause is in IVO because it fails to preserve
base object. This patch can only paper over the issue for address
spaces where PTR type and sizetype have the same length, otherwise IVO
generates wrong code which can't be walked around by this patch. I
will take PR66768.
Hmm. In 2012 I submitted a patch "Preserve pointer types in ivopts",
which got lost in review. It was for a different problem than address
spaces, but it might be worth taking a look whether that approach could
help solve this issue.
Bernd
