Hi, guys I encounter a gcc failure when I build mysql on opensuse[1] 5.6.17/storage/perfschema/pfs_account.cc:320:1: error: could not split insn [ 1245s] } [ 1245s] ^ [ 1245s] (insn 482 1770 1461 (parallel [ [ 1245s] (set (reg:SI 1 x1 [orig:167 D.16835 ] [167]) [ 1245s] (mem/v:SI (reg/f:DI 0 x0 [orig:166 D.16844 ] [166]) [-1 S4 A32])) [ 1245s] (set (mem/v:SI (reg/f:DI 0 x0 [orig:166 D.16844 ] [166]) [-1 S4 A32]) [ 1245s] (unspec_volatile:SI [ [ 1245s] (ior:SI (mem/v:SI (reg/f:DI 0 x0 [orig:166 D.16844 ] [166]) [-1 S4 A32]) [ 1245s] (const_int 0 [0])) [ 1245s] (const_int 5 [0x5]) [ 1245s] ] UNSPECV_ATOMIC_OP)) [ 1245s] (clobber (reg:CC 66 cc)) [ 1245s] (clobber (reg:SI 4 x4)) [ 1245s] (clobber (reg:SI 3 x3)) [ 1245s] ]) /home/abuild/rpmbuild/BUILD/mysql-5.6.17/include/my_atomic.h:217 1814 {atomic_fetch_orsi} [ 1245s] (expr_list:REG_UNUSED (reg:CC 66 cc) [ 1245s] (expr_list:REG_UNUSED (reg:SI 4 x4) [ 1245s] (expr_list:REG_UNUSED (reg:SI 3 x3) [ 1245s] (nil))))) [ 1245s] /home/abuild/rpmbuild/BUILD/mysql-5.6.17/storage/perfschema/pfs_account.cc:320:1: internal compiler error: in final_scan_insn, at final.c:2897
Ihis bug could be fixed by Michael's patch(r217076): 2014-11-04 Michael Collison <michael.colli...@linaro.org> * config/aarch64/iterators.md (lconst_atomic): New mode attribute to support constraints for CONST_INT in atomic operations. * config/aarch64/atomics.md (atomic_<atomic_optab><mode>): Use lconst_atomic constraint. (atomic_nand<mode>): Likewise. (atomic_fetch_<atomic_optab><mode>): Likewise. (atomic_fetch_nand<mode>): Likewise. (atomic_<atomic_optab>_fetch<mode>): Likewise. (atomic_nand_fetch<mode>): Likewise. Michael's patch could be applied on the top of gcc 4.8 branch except the gcc/ChangeLog. Is it possible backport this patch to gcc 4.8 branch? I am new to here, I am not sure if I need send the patch with modified ChangeLog. Sorry if I break the rules. regards bamvor [1] https://bugzilla.opensuse.org/show_bug.cgi?id=896667