r256745 - in /trunk/gcc: ChangeLog fold-const.c...

[jakub@gcc.gnu.org]

Author: jakub
Date: Tue Jan 16 15:08:32 2018
New Revision: 256745

URL: https://gcc.gnu.org/viewcvs?rev=256745&root=gcc&view=rev
Log:
	PR c/83844
	* stor-layout.c (handle_warn_if_not_align): Use byte_position and
	multiple_of_p instead of unchecked tree_to_uhwi and UHWI check.
	If off is not INTEGER_CST, issue a may not be aligned warning
	rather than isn't aligned.  Use isn%'t rather than isn't.
	* fold-const.c (multiple_of_p) <case BIT_AND_EXPR>: Don't fall through
	into MULT_EXPR.
	<case MULT_EXPR>: Improve the case when bottom and one of the
	MULT_EXPR operands are INTEGER_CSTs and bottom is multiple of that
	operand, in that case check if the other operand is multiple of
	bottom divided by the INTEGER_CST operand.

	* gcc.dg/pr83844.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr83844.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/stor-layout.c
    trunk/gcc/testsuite/ChangeLog