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.christina@arm.com>

	* gcc/reginfo.c (fix_register): Allow FP to be set if
	-fomit-frame-pointer.

gcc/testsuite/
2016-08-17  Tamar Christina  <tamar.christina@arm.com>

	* gcc.target/aarch64/fp_free_1.c: New.