r248946 - in /trunk/gcc: ChangeLog doc/md.texi

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Wed Jun  7 06:45:36 2017
New Revision: 248946

URL: https://gcc.gnu.org/viewcvs?rev=248946&root=gcc&view=rev
Log:
Clarify define_insn documentation

This patch tries to clarify some of the restrictions on define_insn
conditions, and also on the use of "#".

2017-06-06  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* doc/md.texi: Clarify the restrictions on a define_insn condition.
	Say that # requires an associated define_split to exist, and that
	the define_split must be suitable for use after register allocation.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/md.texi