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fold-const.c (fold_comparsion): Pass OEP_ADDRESS_OF when comparing addresses. 

* fold-const.c (fold_comparsion): Pass OEP_ADDRESS_OF when comparing
	addresses.
	(fold_addr_of_array_ref_difference): Likewise.

From-SVN: r228701
This commit is contained in:
Jan Hubicka 2015-10-12 07:26:47 +02:00 committed by Jan Hubicka
parent 0732f75fce
commit 38e9e539bc
2 changed files with 9 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-10-11 Jan Hubicka <hubicka@ucw.cz>
* fold-const.c (fold_comparsion): Pass OEP_ADDRESS_OF when comparing
addresses.
(fold_addr_of_array_ref_difference): Likewise.
2015-10-11 Jeff Law <law@redhat.com>
* tree-ssa-threadedge.c (fsm_find_thread_path): Moved from here into

5
gcc/fold-const.c
View File

@ -8426,7 +8426,8 @@ fold_comparison (location_t loc, enum tree_code code, tree type,
/* If we have equivalent bases we might be able to simplify. */
if (indirect_base0 == indirect_base1
&& operand_equal_p (base0, base1, 0))
&& operand_equal_p (base0, base1,
indirect_base0 ? OEP_ADDRESS_OF : 0))
{
/* We can fold this expression to a constant if the non-constant
offset parts are equal. */
@ -8846,7 +8847,7 @@ fold_addr_of_array_ref_difference (location_t loc, tree type,
&& (base_offset = fold_binary_loc (loc, MINUS_EXPR, type,
TREE_OPERAND (base0, 0),
TREE_OPERAND (base1, 0))))
|| operand_equal_p (base0, base1, 0))
|| operand_equal_p (base0, base1, OEP_ADDRESS_OF))
{
tree op0 = fold_convert_loc (loc, type, TREE_OPERAND (aref0, 1));
tree op1 = fold_convert_loc (loc, type, TREE_OPERAND (aref1, 1));