I'll add more details as they unfold, but wanted to get this posted into bugzilla. The autotester has been pretty flaky lately that I don't have a good idea when this broke, but looks to have broken somewhere between Oct 29 and Nov 4. I don't have data between those dates, but Nov 4. build did not compile mesa. SegFault doesn't happen at -O1.
SegFault Building mesa. /opt/gcc-nightly/gcc/libexec/gcc/powerpc64-linux/4.0.0/cc1 -O2 context.c context.c: In function gl_create_visual: context.c:1082: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Watching in GDB shows. Analyzing compilation unit Performing intraprocedural optimizations Assembling functions: free_shared_state init_material gl_create_visual Program received signal SIGSEGV, Segmentation fault. note_stores (x=0x403d62f0, fun=0x10325090 <forget_old_reloads_1>, data=0x0) at /home/gccbuild/gcc_mline_anoncvs/gcc/gcc/rtlanal.c:1405 1405 /home/gccbuild/gcc_mline_anoncvs/gcc/gcc/rtlanal.c: No such file or directory. in /home/gccbuild/gcc_mline_anoncvs/gcc/gcc/rtlanal.c -- Summary: ICE compiling mesa at -O2 Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P2 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: jgrimm2 at us dot ibm dot com CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18420