r215388 - in /trunk/gcc: ChangeLog doc/md.texi ...

[jgreenhalgh@gcc.gnu.org]

Author: jgreenhalgh
Date: Fri Sep 19 10:37:40 2014
New Revision: 215388

URL: https://gcc.gnu.org/viewcvs?rev=215388&root=gcc&view=rev
Log:
[Patch] Teach genrecog/genoutput that scratch registers require write  constraint modifiers

gcc/

	* doc/md.texi (Modifiers): Consistently use "read/write"
	nomenclature rather than "input/output".
	* genrecog.c (constraints_supported_in_insn_p): New.
	(validate_pattern): If needed, also check constraints on
	MATCH_SCRATCH operands.
	* genoutput.c (validate_insn_alternatives): Catch earlyclobber
	operands with no '=' or '+' modifier.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/md.texi
    trunk/gcc/genoutput.c
    trunk/gcc/genrecog.c