This is the mail archive of the
gcc-help@gcc.gnu.org
mailing list for the GCC project.
Does -tree apply to armel?
- From: Jeffrey Walton <noloader at gmail dot com>
- To: "gcc-help at gcc dot gnu dot org" <gcc-help at gcc dot gnu dot org>
- Date: Thu, 5 Nov 2015 23:00:34 -0500
- Subject: Does -tree apply to armel?
- Authentication-results: sourceware.org; auth=none
- Reply-to: noloader at gmail dot com
Hi Everyone,
I was reading the description for -tree at
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html. The
description states:
-free
Attempt to remove redundant extension instructions. This is
especially helpful for the x86-64 architecture, which implicitly
zero-extends in 64-bit registers after writing to their lower
32-bit half.
Enabled for Alpha, AArch64 and x86 at levels -O2, -O3, -Os.
Debian is reporting issues to us under three Chroot environments:
armel, arm64, and amd64 (arm64 is aarch64). The issues are around an
area where Big Integers are used, and it only occurs at -O2 and above.
The Big Integers have some hand-tuned assembly language routines.
Interactions with -tree are at the top of my list because of the
symptoms, but I am not sure about armel.
Does -tree apply to armel?
Thanks in advance.