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[Bug middle-end/49519] [4.7 Regression] Revision 175272 miscompiled 447.dealII in SPEC CPU 2006
- From: "kirill.yukhin at intel dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 6 Jul 2011 11:50:47 +0000
- Subject: [Bug middle-end/49519] [4.7 Regression] Revision 175272 miscompiled 447.dealII in SPEC CPU 2006
- Auto-submitted: auto-generated
- References: <bug-49519-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49519
--- Comment #19 from Yukhin Kirill <kirill.yukhin at intel dot com> 2011-07-06 11:49:34 UTC ---
Created attachment 24701
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24701
Patch to make tailcall check more conservative
Attached patch adds another check for clobbered stack area.
If address comes from a register - we have no idea about destination address.
That means we must act in conservative way - address possibly overlaps with
stack area of interest.