Re: [Patch PR 45260]: [4.5/4.6 Regression] g++4.5: -prefetch-loop-arrays internal compiler error: in verify_expr, at tree-cfg.c:2541

[Richard Guenther <richard.guenther@gmail.com>]

On Sat, Aug 21, 2010 at 12:44 AM, Fang, Changpeng
<Changpeng.Fang@amd.com> wrote:
> Hi,
>
> The attached patch fixes PR 45260:  [4.5/4.6 Regression] g++4.5: -prefetch-loop-arrays internal compiler error: in verify_expr, at tree-cfg.c:2541
>
> Problem: The prefetch pass generates an ADDR_EXPR for COMPONENT_REF(VIEW_CONVERT_EXPR(SSA_NAME)) whose
> address could not be taken, and thus invokes an assertion failure in verify_expr.
>
> Solution: Don't generate prefetch for references whose base address could not be taken.
>
> In this patch, we make may_be_nonaddressable_p (tree expr) global and use it in the prefetch pass.
>
> This patch passed bootstrapping and gcc regression tests on x86_64-unknown-linux-gnu systems ib both
> trunk and 4.5 branch.
>
> Is it OK to commit to trunk and 4.5 branch?

Ok.

Thanks,
Richard.

> Thanks and have a wonderful weekend!
>
> Changpeng