r239953 - in /trunk/gcc: ChangeLog builtins.c d...

[msebor at gcc dot gnu dot org]

Author: msebor
Date: Fri Sep  2 02:14:50 2016
New Revision: 239953

URL: https://gcc.gnu.org/viewcvs?rev=239953&root=gcc&view=rev
Log:
PR tree-optimization/71831 - __builtin_object_size poor results with no
	optimization

gcc/testsuite/ChangeLog:

	PR tree-optimization/71831
	* gcc.dg/builtin-object-size-16.c: New test.
	* gcc.dg/builtin-object-size-17.c: New test.

gcc/ChangeLog:

	PR tree-optimization/71831
	* tree-object-size.h: Return bool instead of the size and add
	argument for the size.
	* tree-object-size.c (compute_object_offset): Update signature.
	(addr_object_size): Same.
	(compute_builtin_object_size): Return bool instead of the size
	and add argument for the size.  Handle POINTER_PLUS_EXPR when
	optimization is disabled.
	(expr_object_size): Adjust.
	(plus_stmt_object_size): Adjust.
	(pass_object_sizes::execute): Adjust.
	* builtins.c (fold_builtin_object_size): Adjust.
	* doc/extend.texi (Object Size Checking): Update.
	* ubsan.c (instrument_object_size): Adjust.


Added:
    trunk/gcc/testsuite/gcc.dg/builtin-object-size-16.c
    trunk/gcc/testsuite/gcc.dg/builtin-object-size-17.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/doc/extend.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-object-size.c
    trunk/gcc/tree-object-size.h
    trunk/gcc/ubsan.c