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[Bug middle-end/45722] [4.6 Regression] FAIL: gcc.c-torture/execute/20040709-2.c execution at -O1 and -Os
- From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 11 Nov 2010 21:45:42 +0000
- Subject: [Bug middle-end/45722] [4.6 Regression] FAIL: gcc.c-torture/execute/20040709-2.c execution at -O1 and -Os
- Auto-submitted: auto-generated
- References: <bug-45722-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45722
--- Comment #22 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2010-11-11 21:45:40 UTC ---
It dies with SIGBUS here:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x00012d24 in testE ()
at
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.c-torture/execute/20040709-2.c:95
95 struct pck E { unsigned long long l, i : 12, j : 23, k : 29; }; T(E)
1: x/i $pc
=> 0x12d24 <testE+428>: ld [ %i5 ], %i0
(gdb) p $i5
$1 = 162310
The source address (%i5) isn't 4-byte aligned as it should be.
I'm attaching the assembler output for the 32-bit -Os case.
Btw., IRIX 6.5 (mips-sgi-irix6.5) is equally affected, both 32 and
64-bit. I haven't checked in more detail what's happening there yet.
Rainer