The SPEC CPU2000 test 176.gcc has been failing on powerpc64-*-linux-gnu
with "-m64 -O1" since this patch was added:
2004-10-23 Daniel Berlin <[EMAIL PROTECTED]>
* tree-ssa-dom.c (record_equality): Use loop depth to determine
which way to record the equality as well.
(loop_depth_of_name): New function.
The failure goes away if the patch is reverted from mainline sources.
The miscompare is due to function exact_log2_wide from toplev.c in
176.gcc, which returns 63 instead of 31 for the value -2147483648.
I'll attach a testcase with that function.
--
Summary: 176.gcc miscompare with -m64 after DOM change
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: janis at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: powerpc64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20134
