[PATCH] PR rtl-optimization/106421: ICE in bypass_block from non-local goto.

[Richard Biener]

On Mon, Jan 9, 2023 at 8:50 PM Roger Sayle <roger@nextmovesoftware.com> wrote:
>
>
> This patch fixes PR rtl-optimization/106421, an ICE-on-valid (but
> undefined) regression.  The fix, as proposed by Richard Biener, is to
> defend against BLOCK_FOR_INSN returning NULL in cprop's bypass_block.
>
> This patch has been tested on x86_64-pc-linux-gnu with make bootstrap
> and make -k check, both with and without --target_board=unix{-m32},
> with no new failures.  Ok for mainline?

OK.

>
> 2023-01-09  Roger Sayle  <roger@nextmovesoftware.com>
>
> gcc/ChangeLog
>         PR rtl-optimization/106421
>         * cprop.cc (bypass_block): Check that DEST is local to this
>         function (non-NULL) before calling find_edge.
>
> gcc/testsuite/ChangeLog
>         PR rtl-optimization/106421
>         * gcc.dg/pr106421.c: New test case.
>
>
> Thanks in advance,
> Roger
> --
>