r249373 - in /trunk/gcc: ChangeLog c/ChangeLog ...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon Jun 19 15:01:13 2017
New Revision: 249373

URL: https://gcc.gnu.org/viewcvs?rev=249373&root=gcc&view=rev
Log:
2017-06-19  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/80887
        c/
	* gimple-parser.c (c_parser_gimple_postfix_expression): Handle
	negated _Literals to parse _Literal (int) -1.

	* tree-ssa-sccvn.c (mprts_hook_cnt): New global.
	(vn_lookup_simplify_result): Allow only mprts_hook_cnt succesful
	simplified lookups, then reset mprts_hook.
	(vn_nary_build_or_lookup_1): Set mprts_hook_cnt to 9 before
	simplifying.
	(try_to_simplify): Likewise.

	* gcc.dg/tree-ssa/pr80887.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr80887.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/gimple-parser.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c