On 09/05/2016 08:59 AM, Tamar Christina wrote:
Hi All,
This patch allows the FP register to be used as a call-saved
register when -fomit-frame-pointer is used.
The change is done in such a way that the defaults do not change.
To use the FP register both -fomit-frame-pointer and
-fcall-saved-<hard_fp_reg> need to be used.
Regression ran on aarch64-none-linux-gnu and no regressions.
Bootstrapped and ran regressions on `x86_64` and no regressions.
A new test fp_free_1 was added to test functionality.
Ok for trunk?
Thanks,
Tamar
PS. I don't have commit rights so if OK can someone apply the patch for me.
gcc/
2016-09-01 Tamar Christina <tamar.christ...@arm.com>
* gcc/reginfo.c (fix_register): Allow FP to be set if
-fomit-frame-pointer.
I'm a little surprised you need this. Most ports allow use of FP as a
call-saved register with -fomit-frame-pointer.
Also note the documentation explicitly forbids using -fcall-saved for
the stack or frame pointer.
Jeff
