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[Bug tree-optimization/28778] [4.0/4.1/4.2 Regression] alias bug with cast and call clobbered
- From: "drow at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Aug 2006 19:57:12 -0000
- Subject: [Bug tree-optimization/28778] [4.0/4.1/4.2 Regression] alias bug with cast and call clobbered
- References: <bug-28778-1447@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from drow at gcc dot gnu dot org 2006-08-25 19:57 -------
I am looking at this.
The difference between those two compilers in t16.ssa is:
- # blist_1 = PHI <blist_6(2), blist_7(1)>;
+ # blist_1 = PHI <blist_7(1), blist_6(2)>;
The difference in t17.alias1 is that, plus:
-Variable: list, UID 2, int[31], is addressable, call clobbered, default def:
list_4
+Variable: list, UID 2, int[31], is addressable, default def: list_4
-blist_1, points-to anything, points-to vars: { list }
+blist_1, points-to anything
-list, UID 2, int[31], is addressable, call clobbered, default def: list_4
+list, UID 2, int[31], is addressable, default def: list_4
I'm pretty positive the patch shouldn't have changed what's call clobbered!
This should be easy to track down.
--
drow at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |drow at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
Last reconfirmed|2006-08-18 21:17:52 |2006-08-25 19:57:09
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28778