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From: "dnovillo at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/31036] [4.3 Regression] ACATS: verify_ssa failed for c41307d c85006d cd10002 cxaa018
Date: Sun, 04 Mar 2007 19:04:00 -0000 [thread overview]
Message-ID: <20070304190402.31600.qmail@sourceware.org> (raw)
In-Reply-To: <bug-31036-7210@http.gcc.gnu.org/bugzilla/>
------- Comment #8 from dnovillo at gcc dot gnu dot org 2007-03-04 19:04 -------
(In reply to comment #7)
> If you have a run directory:
> cd gcc/testsuite/ada/acats/tests/c4/c41307d
> gdb .../gcc/x86_64-unknown-linux-gnu/4.3.0/gnat1
> r -I../../../support -quiet -dumpbase c41307d.adb -O1 -mtune=generic
> c41307d.adb
>
> If not cd somewhere then
> gnatchop .../version-head/gcc/testsuite/ada/acats/tests/c4/c41307d.ada
> gnatchop ../version-head/gcc/testsuite/ada/acats/support/rep*
> gcc -c -O1 c41307d.adb
>
Thanks. It's one of these three symbols:
c41307d: This symbols is not marked call-clobbered: C.83
c41307d: This symbols is not marked call-clobbered: C.84
c41307d: This symbols is not marked call-clobbered: C.87
These symbols are in the alias set of a call-clobbered memory tag. When the
operand scanner is adding VDEFs for this call-clobbered tag, it goes through
the set of aliases adding VDEF operands for them. However, since these symbols
are not marked as call-clobbered, the operand scanner is ignoring them.
For now, I'm suspecting a bug in alias analysis because according to the alias
dumps, the variables are all considered global and addressable. We are not
discovering that their address escape.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31036
next prev parent reply other threads:[~2007-03-04 19:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-04 13:14 [Bug ada/31036] New: " laurent at guerby dot net
2007-03-04 13:25 ` [Bug ada/31036] " laurent at guerby dot net
2007-03-04 13:28 ` laurent at guerby dot net
2007-03-04 13:45 ` laurent at guerby dot net
2007-03-04 17:39 ` [Bug tree-optimization/31036] [4.3 Regression] " pinskia at gcc dot gnu dot org
2007-03-04 18:26 ` laurent at guerby dot net
2007-03-04 18:37 ` dnovillo at gcc dot gnu dot org
2007-03-04 18:44 ` laurent at guerby dot net
2007-03-04 19:04 ` dnovillo at gcc dot gnu dot org [this message]
2007-03-04 19:07 ` pinskia at gcc dot gnu dot org
2007-06-09 8:40 ` [Bug tree-optimization/31036] [4.3 Regression] verify_ssa failure for ACATS " ebotcazou at gcc dot gnu dot org
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