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Re: [Bug tree-optimization/23382] [4.1 Regression] tree-ssa-alias creates a new virtual variable for malloc each time may_alias is run (HEAP)
- From: Andrew Pinski <pinskia at physics dot uc dot edu>
- To: gcc-bugzilla at gcc dot gnu dot org
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 13 Aug 2005 23:48:11 -0400
- Subject: Re: [Bug tree-optimization/23382] [4.1 Regression] tree-ssa-alias creates a new virtual variable for malloc each time may_alias is run (HEAP)
- References: <20050814033625.23382.pinskia@gcc.gnu.org> <20050814034015.2974.qmail@sourceware.org>
On Aug 13, 2005, at 11:40 PM, dberlin at dberlin dot org wrote:
Uh, so?
We keep the virtual variable around even in the clobbered variables.
Add a function call to an different function like say f so it does
not get GC'd and we keep on adding more and more V_MAY_DEFs:
# HEAP.6_36 = V_MAY_DEF <HEAP.6_73>;
# HEAP.7_37 = V_MAY_DEF <HEAP.7_71>;
# HEAP.8_38 = V_MAY_DEF <HEAP.8_70>;
# HEAP.18_78 = V_MAY_DEF <HEAP.18_77>;
# HEAP.19_79 = V_MAY_DEF <HEAP.19_14>;
# HEAP.20_80 = V_MAY_DEF <HEAP.20_76>;
g ();
-- Pinski