[Bug target/60137] New: Code fails with -mcpu=power8 -O3 -mno-vsx

[meissner at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60137

            Bug ID: 60137
           Summary: Code fails with -mcpu=power8 -O3 -mno-vsx
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: meissner at gcc dot gnu.org

Created attachment 32097
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32097&action=edit
Program to show the problem

If you disable VSX but enable vectorization and power8 code generation, the
compiler returns a cannot split insn error:

foo.c: In function ‘init_reg_sets_1’:
foo.c:10:1: error: could not split insn
 }
 ^
(insn:TI 730 812 622 (set (reg:V16QI 6 6 [orig:378 vect_patt_115.53 ] [378])
        (mem/c:V16QI (reg:DI 9 9) [0  S16 A128])) 1080 {*altivec_movv16qi}
     (expr_list:REG_DEAD (reg:DI 9 9)
        (nil)))
foo.c:10:1: internal compiler error: in final_scan_insn, at final.c:2963
0x8ef868 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/meissner/fsf-src/trunk/gcc/rtl-error.c:109
0x6ed23d final_scan_insn(rtx_def*, _IO_FILE*, int, int, int*)
        /home/meissner/fsf-src/trunk/gcc/final.c:2963
0x6ed661 final(rtx_def*, _IO_FILE*, int)
        /home/meissner/fsf-src/trunk/gcc/final.c:2024
0x6ed889 rest_of_handle_final
        /home/meissner/fsf-src/trunk/gcc/final.c:4438
0x6ed889 execute
        /home/meissner/fsf-src/trunk/gcc/final.c:4513
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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