Last known to work with: "Mon Dec 12 22:04:54 UTC 2005 (revision 108426M)".
Known to fail with: "Mon Jan 2 13:08:54 UTC 2006 (revision 109236M)":
Running
/home/hp/combined/combined/gcc/testsuite/gcc.c-torture/execute/execute.exp ...
FAIL: gcc.c-torture/execute/960802-1.c execution, -O1
FAIL: gcc.c-torture/execute/960802-1.c execution, -O2
With the message in gcc.log showing an abort call.
The assembly code acts as if the line
v = (v & 0x00ffffff) | (o & 0xff000000);
was
v = o;
(actually there are no instructions which is the same as passing on the
return value from the previous call as the first parameter in this ABI.)
Looking at the RTL dumps, it seems combine is at fault; all the bit fiddling
is gone.
As there has been changes in this area after Jan 2, I expect it to have been
fixed but it seemed proper to add this PR before updating.
I assign it to myself until I've checked whether it remains, so no-one is
tempted to do a wild goose chase.
--
Summary: [4.2 regression] testsuite failure:gcc.c-
torture/execute/960802-1.c -O1 and -O2
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: hp at gcc dot gnu dot org
ReportedBy: hp at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: cris-axis-elf, cris-axis-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25677
