Tweaks to RTL locus preservation code (2)
H.J. Lu
hjl.tools@gmail.com
Thu Nov 25 08:57:00 GMT 2010
On Sun, Oct 24, 2010 at 12:37 AM, Eric Botcazou <ebotcazou@adacore.com> wrote:
> Another couple of small tweaks to the code introduced by Jakub to preserve
> location info at -O0, this time to fixup_reorder_chain. The first change
> makes it so that the code doesn't try to split non-fallthru edges to the exit
> block (this can happen with unusual combinations of options) and the second
> one avoids creating several artificial basic blocks because of the same locus
> on different edges.
>
> Tested (GCC + GDB) on x86_64-suse-linux, applied on the mainline.
>
>
> 2010-10-24 Eric Botcazou <ebotcazou@adacore.com>
>
> * cfglayout.c (fixup_reorder_chain): When ensuring that there is at
> least one insn with a locus corresponding to an edge's goto_locus,
> disregard non-fallthru edges to the exit block and merge the blocks
> created for the same goto_locus.
>
>
This caused:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46649
--
H.J.
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